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1157:, which are kept open when the system is in operation and will automatically shut by taking away the power supply. This happens when there is a problem with a unit or a section of a fluid system such as a leak in order to isolate the problem from the rest of the system. Examples of normally-open valves are purge-gas supply valves or emergency-relief valves. When there is a problem these valves open (by switching them 'off') causing the unit to be flushed and emptied.
1072:. According to API Standards 600, "Steel Gate Valve-Flanged and Butt-welding Ends, Bolted Bonnets", the trim consists of stem, seating surface in the body, gate seating surface, bushing or a deposited weld for the backseat and stem hole guide, and small internal parts that normally contact the service fluid, excluding the pin that is used to make a stem-to-gate connection (this pin shall be made of an austenitic stainless steel material).
94:
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Valves are typically rated for maximum temperature and pressure by the manufacturer. The wetted materials in a valve are usually identified also. Some valves rated at very high pressures are available. When a designer, engineer, or user decides to use a valve for an application, he/she should ensure
882:
The "seat" is the interior surface of the body which contacts the disc to form a leak-tight seal. In discs that move linearly or swing on a hinge or trunnion, the disc comes into contact with the seat only when the valve is shut. In disks that rotate, the seat is always in contact with the disk, but
831:
A disc, also known as a valve member, is a movable obstruction inside the stationary body that adjustably restricts flow through the valve. Although traditionally disc-shaped, discs come in various shapes. Depending on the type of valve, a disc can move linearly inside a valve, or rotate on the stem
1329:
Valves in good condition should be leak-free. However, valves may eventually wear out from use and develop a leak, either between the inside and outside of the valve or, when the valve is shut to stop flow, between the disc and the seat. A particle trapped between the seat and disc could also cause
1273:
Many valves are controlled manually with a handle attached to the stem. If the handle is turned ninety degrees between operating positions, the valve is called a quarter-turn valve. Butterfly, ball valves, and plug valves are often quarter-turn valves. If the handle is circular with the stem as the
1120:
Operating positions for 2-port valves can be either shut (closed) so that no flow at all goes through, fully open for maximum flow, or sometimes partially open to any degree in between. Many valves are not designed to precisely control intermediate degree of flow; such valves are considered to be
1199:
come with T- or L-shaped fluid passageways inside the rotor. The T valve might be used to permit connection of one inlet to either or both outlets or connection of the two outlets. The L valve could be used to permit disconnection of both or connection of either but not both of two inlets to one
848:
use spherical rotors with a cylindrical hole drilled as a fluid passage. Plug valves use cylindrical or conically tapered rotors called plugs. Other round shapes for rotors are possible as well in rotor valves, as long as the rotor can be turned inside the valve body. However, not all round or
959:, or some combination of these (Angle valve using torque reactor pin and Hub Assembly). The valve and stem can be threaded such that the stem can be screwed into or out of the valve by turning it in one direction or the other, thus moving the disc back or forth inside the body.
1139:. For example, needle valves have elongated conically tapered discs and matching seats for fine flow control. For some valves, there may be a mechanism to indicate by how much the valve is open, but in many cases other indications of flow rate are used, such as separate
750:
of the valve, the internal parts are put into the body and then the bonnet is attached to hold everything together inside. To access internal parts of a valve, a user would take off the bonnet, usually for maintenance. Many valves do not have bonnets; for example,
1047:
for spring-loading, to normally shift the disc into some position by default but allow control to reposition the disc. Relief valves commonly use a spring to keep the valve shut, but allow excessive pressure to force the valve open against the spring-loading.
1146:
In plants with remote-controlled process operation, such as oil refineries and petrochemical plants, some 2-way valves can be designated as normally closed (NC) or normally open (NO) during regular operation. Examples of normally-closed valves are
342:
The simplest, and very ancient, valve is simply a freely hinged flap which swings down to obstruct fluid (gas or liquid) flow in one direction, but is pushed up by the flow itself when the flow is moving in the opposite direction. This is called a
1318:
the rated maximum temperature and pressure are never exceeded and that the wetted materials are compatible with the fluid the valve interior is exposed to. In Europe, valve design and pressure ratings are subject to statutory regulation under the
811:. An actuator is a mechanism or device to automatically or remotely control a valve from outside the body. Some valves have neither handle nor actuator because they automatically control themselves from inside; for example, check valves and
806:
A handle is used to manually control a valve from outside the valve body. Automatically controlled valves often do not have handles, but some may have a handle (or something similar) anyway to manually override automatic control, such as a
931:
A closed soft seated valve is much less liable to leak when shut while hard seated valves are more durable. Gate, globe, and check valves are usually hard seated while butterfly, ball, plug, and diaphragm valves are usually soft seated.
389:
Valves are found in virtually every industrial process, including water and sewage processing, mining, power generation, processing of oil, gas and petroleum, food manufacturing, chemical and plastic manufacturing and many other fields.
507:
refers to the poppet valves found in the vast majority of modern internal combustion engines such as those in most fossil fuel powered vehicles which are used to control the intake of the fuel-air mixture and allow exhaust gas venting.
1290:
actuators which are controlled by the pressure of a liquid such as oil or water. Actuators can be used for the purposes of automatic control such as in washing machine cycles, remote control such as the use of a centralised
1295:, or because manual control is too difficult such as when the valve is very large. Pneumatic actuators and hydraulic actuators need pressurised air or liquid lines to supply the actuator: an inlet line and an outlet line.
1325:
Some fluid system designs, especially in chemical or power plants, are schematically represented in piping and instrumentation diagrams. In such diagrams, different types of valves are represented by certain symbols.
1160:
Although many 2-way valves are made in which the flow can go in either direction between the two ports, when a valve is placed into a certain application, flow is often expected to go from one certain port on the
370:, industrial uses for controlling processes, residential uses such as on/off and pressure control to dish and clothes washers and taps in the home. Valves are also used in the military and transport sectors. In
697:
are very common. Seawater applications, like desalination plants, often use duplex valves, as well as super duplex valves, due to their corrosion resistant properties, particularly against warm seawater.
1274:
axis of rotation in the center of the circle, then the handle is called a handwheel. Valves can also be controlled by actuators attached to the stem. They can be electromechanical actuators such as an
1918:
755:
usually do not have bonnets. Many ball valves do not have bonnets since the valve body is put together in a different style, such as being screwed together at the middle of the valve body.
774:
to control flow. Valves most commonly have 2 ports, but may have as many as 20. The valve is almost always connected at its ports to pipes or other components. Connection methods include
558:
849:
spherical discs are rotors; for example, a ball check valve uses the ball to block reverse flow, but is not a rotor because operating the valve does not involve rotation of the ball.
1557:
844:(as in a check valve). A ball is a round valve member with one or more paths between ports passing through it. By rotating the ball, flow can be directed between different ports.
2994:
1238:
A 4-port valve is a valve whose body has four ports equally spaced round the body and the disc has two passages to connect adjacent ports. It is operated with two positions.
1104:
are operating conditions determined by the position of the disc or rotor in the valve. Some valves are made to be operated in a gradual change between two or more positions.
474:. An actuator will stroke the valve depending on its input and set-up, allowing the valve to be positioned accurately, and allowing control over a variety of requirements.
331:, but are usually discussed as a separate category. In an open valve, fluid flows in a direction from higher pressure to lower pressure. The word is derived from the Latin
470:
More complex control systems using valves requiring automatic control based on an external input (i.e., regulating flow through a pipe to a changing set point) require an
1617:
1309:
In some valve designs, the pressure of the flow fluid itself or pressure difference of the flow fluid between the ports automatically controls flow through the valve.
1581:
1533:
3119:
1593:
1173:
are variations of valves in which flow is controlled to produce a certain downstream pressure, if possible. They are often used to control flow of gas from a
493:
1909:
638:
The main parts of the most usual type of valve are the body and the bonnet. These two parts form the casing that holds the fluid going through the valve.
1242:
482:
Valves vary widely in form and application. Sizes typically range from 0.1 mm to 60 cm. Special valves can have a diameter exceeding 5 meters.
963:
is often used between the stem and the bonnet to maintain a seal. Some valves have no external control and do not need a stem as in most check valves.
1845:
1121:
either open or shut. Some valves are specially designed to regulate varying amounts of flow. Such valves have been called by various names such as
1002:
1915:
1299:
are valves which are used to control other valves. Pilot valves in the actuator lines control the supply of air or liquid going to the actuators.
1395:
1899:
1605:
1306:
in a toilet water tank is a liquid level-actuated valve. When a high water level is reached, a mechanism shuts the valve which fills the tank.
1105:
1665:
1303:
1266:
1208:
automatically connect the higher pressure inlet to the outlet while (in some configurations) preventing flow from one inlet to the other.
1497:
1485:
1224:
mix hot and cold water to produce a constant temperature in the presence of variable pressures and temperatures on the two input ports.
1177:. A back-pressure regulator is a variation of a valve in which flow is controlled to maintain a certain upstream pressure, if possible.
3112:
948:
when present. In some cases, the stem and the disc can be combined in one piece, or the stem and the handle are combined in one piece.
371:
1653:
1876:
1521:
522:
Valves are quite diverse and may be classified into a number of basic types. Valves may also be classified by how they are actuated:
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1677:
1355:
658:(see below) passes and that forms a guide and seal for the stem. The bonnet typically screws into or is bolted to the valve body.
206:
1383:
3105:
974:. Valves whose seat is between the disc and the stem and where the stem moves in a direction out of the valve to shut it are
2954:
1629:
1509:
1473:
1545:
966:
Valves whose disc is between the seat and the stem and where the stem moves in a direction into the valve to shut it are
746:
acts as a cover on the valve body. It is commonly semi-permanently screwed into the valve body or bolted onto it. During
1949:
1641:
718:
valves are often used in hydrogen applications. Plastic bodies are used for relatively low pressures and temperatures.
3230:
2274:
290:
177:
80:
264:
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3004:
886:
Seats are classified by whether they are cut directly into the body, or if they are made of a different material:
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1018:
866:
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115:
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the area of contact changes as the disc is turned. The seat always remains stationary relative to the body.
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1319:
1216:
produce a variable mixture of hot and cold water at a variable flow rate under control of a single handle.
17:
1029:
944:
transmits motion from the handle or controlling device to the disc. The stem typically passes through the
3146:
2728:
2530:
1849:
489:
valves to specialized valves which cost thousands of dollars (US) per inch of the diameter of the valve.
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2340:
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144:
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The valve's body is the outer casing of most or all of the valve that contains the internal parts or
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1407:
1193:
Valves with three ports serve many different functions. A few of the possibilities are listed here.
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2345:
1984:
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1212:
993:
are the mechanical seals, or packings, used to prevent the leakage of a gas or fluids from valves.
823:
381:. In compressed air systems, however, valves are used with the most common type being ball valves.
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126:
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1153:, which are only opened while a sample is taken. Other examples of normally-closed valves are
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327:) by opening, closing, or partially obstructing various passageways. Valves are technically
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are integral to the valve body. Nearly all hard seated metal valves have a small amount of
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valves are often used in high temperature applications, such as nuclear plants, whilst
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1935:
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are passages that allow fluid to pass through the valve. Ports are obstructed by the
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which in turn activates the valve, examples of this type of valve found commonly are
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30:
This article is about the flow control device. For the electronic component, see
1784: – Valve controlling flow of breathing gas into and out of a scuba cylinder
319:
is a device or natural object that regulates, directs or controls the flow of a
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2949:
2919:
2914:
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2800:
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2450:
2445:
2289:
2227:
2171:
2119:
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1999:
1916:
Department of Energy
Fundamentals Handbook, Mechanical Science, Module 4 Valves
1827:
1724:
1275:
1233:
1154:
1149:
945:
912:
715:
546:
541:
517:
447:, pedal or wheel. Valves may also be automatic, driven by changes in pressure,
356:
217:
3593:
3588:
3563:
3558:
3653:
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3466:
3255:
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2014:
2009:
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2319:
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2109:
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1754:
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1174:
1135:
1068:
The internal elements of a valve are collectively referred to as a valve's
812:
775:
460:
418:
1763: – Valve where rotation of passages in a plug controls flow direction
3410:
3215:
3156:
2904:
2881:
2856:
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2365:
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2079:
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1347:
1296:
1049:
982:. These terms don't apply to valves with no stem or valves using rotors.
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31:
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752:
731:
531:
526:
410:
393:
People in developed nations use valves in their daily lives, including
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72:
2995:
International
Association of Plumbing and Mechanical Officials (IAPMO)
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installed on a pressurized water line. It is useful to take a fluid
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93:
3634:
3629:
3614:
3550:
3458:
3035:
2723:
2069:
2049:
2004:
1979:
1958:
1828:"Types of valve bodies and their specifications - Actuation Valves"
1279:
1253:(no leak, no gas loss or air entry, no external contamination)....
1096:. Seacocks are usually ball valves, but may be other types as well.
1089:
1010:
1006:
841:
699:
678:
492:
Disposable valves may be found in common household items including
471:
394:
352:
1249:
without affecting the pressure of a hydraulic system and to avoid
903:
are fitted to the valve body and made of softer materials such as
2974:
2871:
2780:
2668:
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2400:
2304:
2284:
2160:
1883:- Nearly 500 valve base classifications and definitions from the
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1080:
1057:
1033:
795:
666:
377:
and other near-atmospheric air flows, valves are instead called
3061:
2770:
2738:
2244:
2217:
2074:
2064:
1742:
1017:. They can also be made of different types of plastic, such as
1014:
990:
960:
956:
791:
787:
674:
464:
456:
347:, as it prevents or "checks" the flow in one direction. Modern
324:
1891:
Animations showing
Internal Function of Various Types of Valve
1189:
Schematic 3 way ball valve: L-shaped ball right, T-shaped left
2673:
2279:
2249:
1623:
Disc for an alloy check valve also known as axial check valve
1362:
952:
837:
703:
686:
670:
662:
444:
443:
Valves may be operated manually, either by a handle or grip,
320:
3127:
1910:
1802: – Process of altering the timing of a valve lift event
1563:
Cryogenic super duplex gate valve frozen up during operation
2750:
2555:
2144:
2034:
1927:
916:
904:
894:
783:
727:
702:
valves are typically used in sulphuric acid plants, whilst
536:
437:
425:
424:
In nature, there are valves, for example one-way valves in
1751: – Tubular section or hollow cylinder made of plastic
1005:
applications. They are typically made of stainless steel,
1001:
A valve ball is also used for severe duty, high-pressure,
1241:
It can be used to isolate and to simultaneously bypass a
1056:, stainless steel, and for high temperature applications
920:
719:
1846:"European Commission Pressure Equipment Directive (PED)"
1769: – Valve controlling the release of a liquid or gas
1265:
A sailor aboard a ship operates the wheel controlling a
1185:
432:, and heart valves controlling the flow of blood in the
405:, gas control valves on cookers, small valves fitted to
1587:
Flanged nozzle inconel check valve or axial check valve
1112:
allow fluid to move in 2 or 1 directions respectively.
366:
Valves have many uses, including controlling water for
1777:
Pages displaying wikidata descriptions as a fallback
1052:
are normally used. Typical spring materials include
213:
1790: – Device for maintaining flow control devices
951:The motion transmitted by the stem may be a linear
118:. Unsourced material may be challenged and removed.
631:position of handle or handwheel if valve were shut
1599:Inside hastelloy check valve, wafer configuration
1539:Inside view of a tilting disc inconel check valve
3651:
1745: – System of pipes used to transport fluids
1733: – Non-destructive test of pressure vessels
1282:, pneumatic actuators which are controlled by
3113:
1943:
1897:Flow in known Design Types of Shut-off Valves
1165:side of the valve, to the other port on the
1075:
222:introducing citations to additional sources
734:are common plastics used for valve bodies.
81:Learn how and when to remove these messages
3120:
3106:
1950:
1936:
1739: – Tubular section or hollow cylinder
485:Valve costs range from simple inexpensive
335:, the moving part of a door, in turn from
1808: – Type of water of steam flow valve
291:Learn how and when to remove this message
178:Learn how and when to remove this message
1260:
1184:
1079:
1028:
871:
856:
822:
556:
451:, or flow. These changes may act upon a
359:downstream and operate on sophisticated
302:
212:Relevant discussion may be found on the
3005:Plumbing & Drainage Institute (PDI)
1312:
14:
3652:
323:(gases, liquids, fluidized solids, or
3101:
1931:
801:
2955:Mechanical, electrical, and plumbing
1611:Large carbon steel swing check valve
1180:
189:
116:adding citations to reliable sources
87:
46:
1704: – Valve with special ceramics
1227:
861:The shut off butterfly valve for a
628:position of disc if valve were shut
561:Cross-sectional diagram of an open
307:These water valves are operated by
24:
1115:
34:. For the video game company, see
25:
3686:
2275:Push-to-pull compression fittings
1867:
1659:Nuts and bolts for incoloy valves
1491:Stainless steel wafer check valve
62:This article has multiple issues.
1676:
1664:
1652:
1640:
1628:
1616:
1604:
1592:
1580:
1568:
1556:
1544:
1532:
1520:
1508:
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1484:
1472:
1457:
1445:
1433:
1418:
1406:
1394:
1382:
1370:
1354:
1340:
650:. The bonnet is the part of the
205:relies largely or entirely on a
194:
92:
51:
1714:Cylinder valve (disambiguation)
463:fitted to hot water systems or
384:
103:needs additional citations for
70:or discuss these issues on the
1838:
1820:
1683:Ball for a titanium ball valve
996:
867:Gordon Power Station, Tasmania
13:
1:
1813:
552:
3015:World Plumbing Council (WPC)
2566:Reduced pressure zone device
1957:
1527:Cryogenic 254 SMO gate valve
1320:Pressure Equipment Directive
477:
436:and maintaining the correct
7:
3010:Uniform Plumbing Code (UPC)
2729:Instant hot water dispenser
2531:Piping and plumbing fitting
1727: – Flow control device
1710: – Flow control device
1698: – Flow control device
1688:
1671:Inconel check valve springs
1635:Balls for alloy ball valves
413:, safety devices fitted to
10:
3691:
2356:Backflow prevention device
2341:Atmospheric vacuum breaker
1912:, controls.engin.umich.edu
1515:Stainless steel ball valve
1440:Stainless steel gate valve
1256:
1231:
1221:Thermostatic mixing valves
1213:Single handle mixer valves
985:
515:
29:
3602:
3549:
3457:
3409:
3341:
3332:
3294:
3139:
3049:
3023:
2983:
2928:
2890:
2809:
2654:
2616:Thermostatic mixing valve
2333:
2153:
1965:
1401:Cast iron butterfly valve
1389:Cast iron butterfly valve
1333:
1155:emergency shutdown valves
1076:Valve operating positions
1024:
923:depending on the maximum
737:
661:Valve bodies are usually
503:A common use of the term
2346:Automatic bleeding valve
1985:Compatibility (chemical)
1775: – fluid conveyance
1575:Super duplex ball valves
1361:A valve controlled by a
758:
511:
2551:Pressure-balanced valve
2546:Pressure vacuum breaker
2255:Pipe (fluid conveyance)
2197:Drain-waste-vent system
2177:Chemical drain cleaners
1063:
1013:, Hastelloy, brass, or
935:
852:
818:
641:
3261:Single-acting cylinder
3194:Double-acting cylinder
3072:Template:Public health
2744:water recycling shower
2714:Hot water storage tank
2045:Onsite sewage facility
1452:Hastelloy check valves
1270:
1190:
1097:
1040:
879:
869:
828:
732:glass-reinforced nylon
635:
312:
40:Valve (disambiguation)
38:. For other uses, see
3129:Engine configurations
3057:Fire sprinkler system
2766:Tankless water heater
2709:Garbage disposal unit
2694:Electric water boiler
2166:British Standard Pipe
1800:Variable valve timing
1796: – Type of valve
1757: – Type of valve
1377:Large butterfly valve
1264:
1197:Three-way ball valves
1188:
1083:
1032:
925:operating temperature
875:
860:
826:
560:
434:chambers of the heart
306:
3231:Oscillating cylinder
2756:Storage water heater
2325:Water heat recycling
2233:National Pipe Thread
2135:Water supply network
1782:Scuba cylinder valve
1413:Hastelloy ball valve
1313:Other considerations
780:compression fittings
494:mini-pump dispensers
218:improve this article
112:improve this article
3324:Two-and four-stroke
3226:Intake over exhaust
3087:Template:Wastewater
2945:Hydrostatic testing
2586:Rooftop water tower
2182:Compression fitting
1832:www.actuation.co.uk
1719:Endobronchial valve
1503:Inconel check valve
1171:Pressure regulators
1043:Many valves have a
1021:, PVC, PP or PVDF.
706:valves are used in
27:Flow control device
3041:Waterborne disease
2940:Hydronic balancing
2699:Evaporative cooler
2664:Accessible bathtub
2561:Radiator (heating)
2541:Pressure regulator
2436:Double check valve
2411:Concentric reducer
2212:Garden Hose Thread
2105:Thermal insulation
1975:Air gap (plumbing)
1921:2017-08-30 at the
1902:2009-11-22 at the
1879:2019-08-20 at the
1551:Duplex ball valves
1479:Inconel gate valve
1365:(on vertical line)
1271:
1191:
1098:
1041:
880:
870:
836:), or rotate on a
829:
815:may have neither.
802:Handle or actuator
710:(HF Acid) plants.
654:through which the
636:
625:when valve is open
604:when valve is open
594:when valve is open
313:
3647:
3646:
3643:
3642:
3343:Inline / straight
3241:Overhead camshaft
3095:
3094:
3077:Template:Sewerage
3024:Health and safety
3000:NSF International
2810:Specialized tools
2689:Drinking fountain
2656:Plumbing fixtures
2536:Plug (sanitation)
2521:Nipple (plumbing)
2441:Eccentric reducer
2421:Coupling (piping)
2386:Chemigation valve
2239:Nominal Pipe Size
2202:Ductile iron pipe
2100:Thermal expansion
1647:Wafer check valve
1243:sampling cylinder
1181:Three-port valves
1110:non-return valves
1054:zinc plated steel
708:hydrofluoric acid
430:blood circulation
415:hot water systems
339:, to turn, roll.
301:
300:
293:
283:
282:
268:
188:
187:
180:
162:
85:
36:Valve Corporation
16:(Redirected from
3682:
3339:
3338:
3334:Cylinder layouts
3122:
3115:
3108:
3099:
3098:
3082:Template:Toilets
2847:Flare-nut wrench
2606:Submersible pump
2431:Dielectric union
2351:Automatic faucet
2310:Thread seal tape
2270:Plastic pipework
2030:Hydrostatic loop
1995:Drain (plumbing)
1952:
1945:
1938:
1929:
1928:
1861:
1860:
1858:
1857:
1848:. Archived from
1842:
1836:
1835:
1824:
1778:
1749:Plastic pipework
1731:Hydrostatic test
1680:
1668:
1656:
1644:
1632:
1620:
1608:
1596:
1584:
1572:
1560:
1548:
1536:
1524:
1512:
1500:
1488:
1476:
1461:
1449:
1437:
1425:Stainless steel
1422:
1410:
1398:
1386:
1374:
1358:
1344:
1322:97/23/EC (PED).
1228:Four-port valves
809:stop-check valve
695:stainless steels
428:controlling the
421:in car engines.
407:washing machines
397:valves, such as
296:
289:
278:
275:
269:
267:
226:
198:
190:
183:
176:
172:
169:
163:
161:
120:
96:
88:
77:
55:
54:
47:
21:
3690:
3689:
3685:
3684:
3683:
3681:
3680:
3679:
3650:
3649:
3648:
3639:
3598:
3545:
3453:
3405:
3328:
3290:
3135:
3126:
3096:
3091:
3045:
3019:
2987:
2985:
2979:
2932:
2930:
2924:
2910:Pressure sensor
2892:
2886:
2862:Plumber's snake
2805:
2786:Water dispenser
2776:Washing machine
2650:
2476:Flushing trough
2426:Diaphragm valve
2416:Condensate pump
2396:Circulator pump
2376:Butterfly valve
2329:
2300:Solvent welding
2192:Crimp (joining)
2149:
2115:Trap (plumbing)
2090:Surface tension
1967:
1961:
1956:
1923:Wayback Machine
1906:, home.arcor.de
1904:Wayback Machine
1881:Wayback Machine
1870:
1865:
1864:
1855:
1853:
1844:
1843:
1839:
1826:
1825:
1821:
1816:
1811:
1788:Valve exerciser
1776:
1691:
1684:
1681:
1672:
1669:
1660:
1657:
1648:
1645:
1636:
1633:
1624:
1621:
1612:
1609:
1600:
1597:
1588:
1585:
1576:
1573:
1564:
1561:
1552:
1549:
1540:
1537:
1528:
1525:
1516:
1513:
1504:
1501:
1492:
1489:
1480:
1477:
1468:
1462:
1453:
1450:
1441:
1438:
1429:
1423:
1414:
1411:
1402:
1399:
1390:
1387:
1378:
1375:
1366:
1359:
1350:
1345:
1336:
1315:
1259:
1236:
1230:
1183:
1150:sampling valves
1118:
1116:Two-port valves
1078:
1066:
1027:
999:
988:
968:normally-seated
955:, a rotational
938:
863:Francis turbine
855:
834:butterfly valve
821:
804:
761:
740:
644:
634:
555:
520:
514:
480:
387:
297:
286:
285:
284:
279:
273:
270:
227:
225:
211:
199:
184:
173:
167:
164:
121:
119:
109:
97:
56:
52:
43:
28:
23:
22:
15:
12:
11:
5:
3688:
3678:
3677:
3675:Water industry
3672:
3667:
3662:
3645:
3644:
3641:
3640:
3638:
3637:
3632:
3627:
3622:
3617:
3612:
3606:
3604:
3600:
3599:
3597:
3596:
3591:
3586:
3581:
3576:
3571:
3566:
3561:
3555:
3553:
3547:
3546:
3544:
3543:
3538:
3533:
3528:
3523:
3518:
3513:
3508:
3503:
3502:
3501:
3491:
3490:
3489:
3479:
3474:
3469:
3463:
3461:
3455:
3454:
3452:
3451:
3446:
3441:
3436:
3431:
3426:
3421:
3415:
3413:
3407:
3406:
3404:
3403:
3398:
3393:
3388:
3383:
3378:
3373:
3368:
3363:
3358:
3353:
3347:
3345:
3336:
3330:
3329:
3327:
3326:
3321:
3316:
3311:
3306:
3300:
3298:
3292:
3291:
3289:
3288:
3283:
3278:
3273:
3268:
3263:
3258:
3253:
3248:
3246:Overhead valve
3243:
3238:
3236:Opposed-piston
3233:
3228:
3223:
3218:
3213:
3212:
3211:
3201:
3196:
3191:
3186:
3181:
3176:
3171:
3170:
3169:
3164:
3154:
3149:
3143:
3141:
3137:
3136:
3133:piston engines
3125:
3124:
3117:
3110:
3102:
3093:
3092:
3090:
3089:
3084:
3079:
3074:
3069:
3064:
3059:
3053:
3051:
3047:
3046:
3044:
3043:
3038:
3033:
3027:
3025:
3021:
3020:
3018:
3017:
3012:
3007:
3002:
2997:
2991:
2989:
2986:organizations
2981:
2980:
2978:
2977:
2972:
2967:
2962:
2957:
2952:
2950:Leak detection
2947:
2942:
2936:
2934:
2926:
2925:
2923:
2922:
2920:Water metering
2917:
2915:Water detector
2912:
2907:
2902:
2896:
2894:
2888:
2887:
2885:
2884:
2879:
2874:
2869:
2867:Plumber wrench
2864:
2859:
2854:
2849:
2844:
2839:
2834:
2829:
2824:
2819:
2813:
2811:
2807:
2806:
2804:
2803:
2801:Water softener
2798:
2793:
2788:
2783:
2778:
2773:
2768:
2763:
2758:
2753:
2748:
2747:
2746:
2736:
2731:
2726:
2721:
2716:
2711:
2706:
2701:
2696:
2691:
2686:
2681:
2676:
2671:
2666:
2660:
2658:
2652:
2651:
2649:
2648:
2643:
2638:
2633:
2631:Vacuum ejector
2628:
2626:Vacuum breaker
2623:
2618:
2613:
2608:
2603:
2598:
2593:
2588:
2583:
2578:
2573:
2568:
2563:
2558:
2553:
2548:
2543:
2538:
2533:
2528:
2523:
2518:
2513:
2508:
2503:
2498:
2493:
2488:
2483:
2478:
2473:
2468:
2463:
2458:
2453:
2451:Faucet aerator
2448:
2446:Expansion tank
2443:
2438:
2433:
2428:
2423:
2418:
2413:
2408:
2403:
2398:
2393:
2388:
2383:
2378:
2373:
2368:
2363:
2358:
2353:
2348:
2343:
2337:
2335:
2331:
2330:
2328:
2327:
2322:
2317:
2312:
2307:
2302:
2297:
2292:
2290:Sewage pumping
2287:
2282:
2277:
2272:
2267:
2262:
2257:
2252:
2247:
2242:
2236:
2230:
2228:Leak detection
2225:
2220:
2215:
2209:
2204:
2199:
2194:
2189:
2184:
2179:
2174:
2172:Cast iron pipe
2169:
2163:
2157:
2155:
2151:
2150:
2148:
2147:
2142:
2137:
2132:
2127:
2122:
2120:Venturi effect
2117:
2112:
2107:
2102:
2097:
2092:
2087:
2082:
2077:
2072:
2067:
2062:
2057:
2055:Sanitary sewer
2052:
2047:
2042:
2037:
2032:
2027:
2022:
2017:
2012:
2007:
2002:
2000:Drinking water
1997:
1992:
1987:
1982:
1977:
1971:
1969:
1963:
1962:
1955:
1954:
1947:
1940:
1932:
1926:
1925:
1913:
1907:
1894:
1888:
1869:
1868:External links
1866:
1863:
1862:
1837:
1818:
1817:
1815:
1812:
1810:
1809:
1803:
1797:
1791:
1785:
1779:
1770:
1764:
1758:
1752:
1746:
1740:
1734:
1728:
1725:Four-way valve
1722:
1716:
1711:
1705:
1699:
1692:
1690:
1687:
1686:
1685:
1682:
1675:
1673:
1670:
1663:
1661:
1658:
1651:
1649:
1646:
1639:
1637:
1634:
1627:
1625:
1622:
1615:
1613:
1610:
1603:
1601:
1598:
1591:
1589:
1586:
1579:
1577:
1574:
1567:
1565:
1562:
1555:
1553:
1550:
1543:
1541:
1538:
1531:
1529:
1526:
1519:
1517:
1514:
1507:
1505:
1502:
1495:
1493:
1490:
1483:
1481:
1478:
1471:
1469:
1463:
1456:
1454:
1451:
1444:
1442:
1439:
1432:
1430:
1424:
1417:
1415:
1412:
1405:
1403:
1400:
1393:
1391:
1388:
1381:
1379:
1376:
1369:
1367:
1360:
1353:
1351:
1346:
1339:
1335:
1332:
1330:such leakage.
1314:
1311:
1276:electric motor
1258:
1255:
1234:Four-way valve
1232:Main article:
1229:
1226:
1205:Shuttle valves
1182:
1179:
1117:
1114:
1092:, on a marine
1077:
1074:
1065:
1062:
1026:
1023:
1003:high-tolerance
998:
995:
987:
984:
976:reverse-seated
937:
934:
929:
928:
898:
854:
851:
820:
817:
803:
800:
760:
757:
739:
736:
643:
640:
633:
632:
629:
626:
620:
615:
610:
605:
595:
589:
584:
579:
574:
568:
554:
551:
550:
549:
544:
542:Solenoid valve
539:
534:
529:
518:List of valves
516:Main article:
513:
510:
479:
476:
386:
383:
349:control valves
309:rotary handles
299:
298:
281:
280:
216:. Please help
202:
200:
193:
186:
185:
100:
98:
91:
86:
60:
59:
57:
50:
26:
9:
6:
4:
3:
2:
3687:
3676:
3673:
3671:
3668:
3666:
3663:
3661:
3658:
3657:
3655:
3636:
3633:
3631:
3628:
3626:
3623:
3621:
3618:
3616:
3613:
3611:
3608:
3607:
3605:
3601:
3595:
3592:
3590:
3587:
3585:
3582:
3580:
3577:
3575:
3572:
3570:
3567:
3565:
3562:
3560:
3557:
3556:
3554:
3552:
3548:
3542:
3539:
3537:
3534:
3532:
3529:
3527:
3524:
3522:
3519:
3517:
3514:
3512:
3509:
3507:
3504:
3500:
3497:
3496:
3495:
3492:
3488:
3485:
3484:
3483:
3480:
3478:
3475:
3473:
3470:
3468:
3465:
3464:
3462:
3460:
3456:
3450:
3447:
3445:
3442:
3440:
3437:
3435:
3432:
3430:
3427:
3425:
3422:
3420:
3417:
3416:
3414:
3412:
3408:
3402:
3399:
3397:
3394:
3392:
3389:
3387:
3384:
3382:
3379:
3377:
3374:
3372:
3369:
3367:
3364:
3362:
3359:
3357:
3354:
3352:
3349:
3348:
3346:
3344:
3340:
3337:
3335:
3331:
3325:
3322:
3320:
3317:
3315:
3312:
3310:
3307:
3305:
3302:
3301:
3299:
3297:
3296:Stroke cycles
3293:
3287:
3284:
3282:
3279:
3277:
3274:
3272:
3269:
3267:
3264:
3262:
3259:
3257:
3254:
3252:
3249:
3247:
3244:
3242:
3239:
3237:
3234:
3232:
3229:
3227:
3224:
3222:
3219:
3217:
3214:
3210:
3207:
3206:
3205:
3202:
3200:
3197:
3195:
3192:
3190:
3187:
3185:
3182:
3180:
3177:
3175:
3172:
3168:
3165:
3163:
3160:
3159:
3158:
3155:
3153:
3150:
3148:
3145:
3144:
3142:
3138:
3134:
3130:
3123:
3118:
3116:
3111:
3109:
3104:
3103:
3100:
3088:
3085:
3083:
3080:
3078:
3075:
3073:
3070:
3068:
3067:Template:HVAC
3065:
3063:
3060:
3058:
3055:
3054:
3052:
3048:
3042:
3039:
3037:
3034:
3032:
3031:Plumbing code
3029:
3028:
3026:
3022:
3016:
3013:
3011:
3008:
3006:
3003:
3001:
2998:
2996:
2993:
2992:
2990:
2988:and standards
2982:
2976:
2973:
2971:
2968:
2966:
2963:
2961:
2958:
2956:
2953:
2951:
2948:
2946:
2943:
2941:
2938:
2937:
2935:
2927:
2921:
2918:
2916:
2913:
2911:
2908:
2906:
2903:
2901:
2900:Control valve
2898:
2897:
2895:
2889:
2883:
2880:
2878:
2875:
2873:
2870:
2868:
2865:
2863:
2860:
2858:
2855:
2853:
2850:
2848:
2845:
2843:
2840:
2838:
2837:Drain cleaner
2835:
2833:
2830:
2828:
2825:
2823:
2820:
2818:
2815:
2814:
2812:
2808:
2802:
2799:
2797:
2794:
2792:
2789:
2787:
2784:
2782:
2779:
2777:
2774:
2772:
2769:
2767:
2764:
2762:
2759:
2757:
2754:
2752:
2749:
2745:
2742:
2741:
2740:
2737:
2735:
2732:
2730:
2727:
2725:
2722:
2720:
2717:
2715:
2712:
2710:
2707:
2705:
2702:
2700:
2697:
2695:
2692:
2690:
2687:
2685:
2682:
2680:
2677:
2675:
2672:
2670:
2667:
2665:
2662:
2661:
2659:
2657:
2653:
2647:
2644:
2642:
2639:
2637:
2634:
2632:
2629:
2627:
2624:
2622:
2619:
2617:
2614:
2612:
2609:
2607:
2604:
2602:
2599:
2597:
2594:
2592:
2589:
2587:
2584:
2582:
2579:
2577:
2574:
2572:
2569:
2567:
2564:
2562:
2559:
2557:
2554:
2552:
2549:
2547:
2544:
2542:
2539:
2537:
2534:
2532:
2529:
2527:
2524:
2522:
2519:
2517:
2514:
2512:
2509:
2507:
2506:Hose coupling
2504:
2502:
2499:
2497:
2494:
2492:
2489:
2487:
2484:
2482:
2479:
2477:
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2434:
2432:
2429:
2427:
2424:
2422:
2419:
2417:
2414:
2412:
2409:
2407:
2406:Closet flange
2404:
2402:
2399:
2397:
2394:
2392:
2389:
2387:
2384:
2382:
2379:
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2344:
2342:
2339:
2338:
2336:
2332:
2326:
2323:
2321:
2318:
2316:
2315:Threaded pipe
2313:
2311:
2308:
2306:
2303:
2301:
2298:
2296:
2293:
2291:
2288:
2286:
2283:
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2240:
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2234:
2231:
2229:
2226:
2224:
2221:
2219:
2216:
2213:
2210:
2208:
2207:Flare fitting
2205:
2203:
2200:
2198:
2195:
2193:
2190:
2188:
2187:Copper tubing
2185:
2183:
2180:
2178:
2175:
2173:
2170:
2167:
2164:
2162:
2159:
2158:
2156:
2152:
2146:
2143:
2141:
2138:
2136:
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2128:
2126:
2123:
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2101:
2098:
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2041:
2038:
2036:
2033:
2031:
2028:
2026:
2023:
2021:
2018:
2016:
2015:Grade (slope)
2013:
2011:
2010:Friction loss
2008:
2006:
2003:
2001:
1998:
1996:
1993:
1991:
1988:
1986:
1983:
1981:
1978:
1976:
1973:
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1964:
1960:
1953:
1948:
1946:
1941:
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1924:
1920:
1917:
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1911:
1908:
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1898:
1895:
1892:
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1886:
1882:
1878:
1875:
1872:
1871:
1852:on 2010-08-15
1851:
1847:
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1738:
1735:
1732:
1729:
1726:
1723:
1720:
1717:
1715:
1712:
1709:
1708:Control valve
1706:
1703:
1702:Ceramic valve
1700:
1697:
1694:
1693:
1679:
1674:
1667:
1662:
1655:
1650:
1643:
1638:
1631:
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1187:
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1172:
1168:
1164:
1158:
1156:
1152:
1151:
1144:
1142:
1138:
1137:
1136:needle valves
1132:
1128:
1124:
1113:
1111:
1107:
1106:Return valves
1103:
1095:
1094:diesel engine
1091:
1087:
1082:
1073:
1071:
1061:
1059:
1055:
1051:
1046:
1039:
1035:
1031:
1022:
1020:
1016:
1012:
1008:
1004:
994:
992:
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962:
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922:
918:
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906:
902:
899:
896:
892:
889:
888:
887:
884:
878:
874:
868:
864:
859:
850:
847:
843:
839:
835:
825:
816:
814:
813:relief valves
810:
799:
797:
793:
789:
785:
781:
777:
773:
769:
765:
756:
754:
749:
745:
735:
733:
729:
725:
721:
717:
713:
709:
705:
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688:
684:
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676:
672:
668:
664:
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624:
621:
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559:
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543:
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538:
535:
533:
530:
528:
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524:
523:
519:
509:
506:
501:
499:
495:
490:
488:
483:
475:
473:
468:
466:
462:
461:safety valves
458:
454:
450:
446:
441:
439:
435:
431:
427:
422:
420:
419:poppet valves
416:
412:
408:
404:
400:
396:
391:
382:
380:
376:
373:
369:
364:
362:
358:
354:
351:may regulate
350:
346:
340:
338:
334:
330:
326:
322:
318:
310:
305:
295:
292:
277:
274:December 2011
266:
263:
259:
256:
252:
249:
245:
242:
238:
235: –
234:
230:
229:Find sources:
223:
219:
215:
209:
208:
207:single source
203:This article
201:
197:
192:
191:
182:
179:
171:
168:December 2011
160:
157:
153:
150:
146:
143:
139:
136:
132:
129: –
128:
124:
123:Find sources:
117:
113:
107:
106:
101:This article
99:
95:
90:
89:
84:
82:
75:
74:
69:
68:
63:
58:
49:
48:
45:
41:
37:
33:
19:
3625:Split-single
3411:Flat / boxer
3271:Swing-piston
2960:Pipe marking
2933:and services
2929:Professions,
2877:Strap wrench
2817:Basin wrench
2796:Water heater
2791:Water filter
2704:Flush toilet
2679:Dehumidifier
2635:
2621:Trench drain
2601:Street elbow
2591:Safety valve
2576:Relief valve
2516:Needle valve
2501:Grinder pump
2471:Flow limiter
2456:Float switch
2391:Chopper pump
2371:Booster pump
2320:Tube bending
2265:Pipe support
2130:Water hammer
2110:Thermosiphon
2040:Neutral axis
1854:. Retrieved
1850:the original
1840:
1831:
1822:
1761:Rotary valve
1755:Poppet valve
1328:
1324:
1316:
1308:
1301:
1297:Pilot valves
1293:control room
1284:air pressure
1272:
1240:
1237:
1219:
1218:
1211:
1210:
1203:
1202:
1195:
1192:
1175:gas cylinder
1166:
1162:
1159:
1148:
1145:
1134:
1130:
1126:
1122:
1119:
1101:
1099:
1088:for cooling
1069:
1067:
1050:Coil springs
1042:
1000:
989:
979:
975:
972:front seated
971:
967:
965:
950:
941:
939:
930:
900:
890:
885:
881:
830:
805:
771:
768:valve member
767:
763:
762:
743:
741:
691:alloy steels
660:
647:
645:
637:
622:
617:
612:
607:
601:
597:
591:
586:
581:
576:
571:
562:
521:
504:
502:
498:aerosol cans
491:
484:
481:
469:
442:
423:
392:
388:
385:Applications
365:
341:
336:
332:
316:
314:
287:
271:
261:
254:
247:
240:
228:
204:
174:
165:
155:
148:
141:
134:
122:
110:Please help
105:verification
102:
78:
71:
65:
64:Please help
61:
44:
18:Inlet valves
3314:Five-stroke
3309:Four-stroke
3266:Split cycle
3204:Free-piston
3147:Atmospheric
2905:Flow sensor
2893:and control
2891:Measurement
2882:Tap and die
2857:Pipe wrench
2842:Driving cap
2734:Laundry tub
2611:Tap (valve)
2596:Sewage pump
2581:Riser clamp
2526:Pinch valve
2496:Grease trap
2491:Globe valve
2481:Flushometer
2466:Floor drain
2461:Float valve
2381:Check valve
2366:Bleed screw
2140:Water table
2080:Storm sewer
1966:Fundamental
1874:ISO-15926-4
1767:Tap (valve)
1348:Globe valve
1141:flow meters
997:Valve balls
980:back seated
907:or various
846:Ball valves
753:plug valves
748:manufacture
564:globe valve
449:temperature
411:dishwashers
345:check valve
32:Vacuum tube
3654:Categories
3319:Six-stroke
3304:Two-stroke
3221:Heron head
3179:Cam engine
2965:Pipefitter
2852:Pipecutter
2832:Core drill
2719:Humidifier
2684:Dishwasher
2646:Zone valve
2641:Water tank
2486:Gate valve
2361:Ball valve
2334:Components
2154:Technology
2125:Wastewater
2085:Stormwater
1856:2010-09-13
1814:References
1806:Zone valve
1794:Valve stem
1696:Ball valve
1466:ball valve
1427:gate valve
1304:fill valve
1267:fuel valve
1167:downstream
1127:throttling
1123:regulating
909:elastomers
901:Soft seats
891:Hard seats
877:Ball valve
827:Valve disc
776:threadings
623:fluid flow
553:Components
487:disposable
368:irrigation
361:automation
244:newspapers
138:newspapers
67:improve it
2984:Industry
2970:Pipelayer
2827:Borescope
2822:Blowtorch
2761:Sump pump
2295:Soldering
2260:Pipe dope
2223:Hydronics
2095:Tap water
2060:Sewer gas
2025:Heat trap
2020:Greywater
1990:Corrosion
1893:, tlv.com
1887:standard.
1885:ISO 15926
1721:, medical
1288:hydraulic
1251:degassing
1102:positions
832:(as in a
712:Hastelloy
683:cast iron
618:gland nut
602:handwheel
532:Pneumatic
527:Hydraulic
478:Variation
453:diaphragm
403:tap water
363:systems.
214:talk page
73:talk page
3670:Plumbing
3251:Pentroof
3199:Flathead
3189:Compound
3167:Rotative
3050:See also
3036:Scalding
2724:Icemaker
2511:Manifold
2070:Sewerage
2050:Pressure
2005:Fuel gas
1980:Backflow
1968:concepts
1959:Plumbing
1919:Archived
1900:Archived
1877:Archived
1689:See also
1280:solenoid
1200:outlet.
1163:upstream
1131:metering
1090:seawater
1011:Stellite
1007:titanium
911:such as
842:trunnion
700:Alloy 20
679:gunmetal
663:metallic
652:encasing
472:actuator
440:action.
395:plumbing
375:ductwork
353:pressure
329:fittings
325:slurries
3459:V / Vee
3276:Uniflow
3209:Stelzer
3184:Camless
3162:Cornish
2975:Plumber
2931:trades,
2872:Plunger
2781:Washlet
2669:Bathtub
2571:Reducer
2401:Cistern
2305:Swaging
2285:Sealant
2161:Brazing
1464:Duplex
1257:Control
1086:seacock
1058:Inconel
1034:Inconel
991:Gaskets
986:Gaskets
961:Packing
895:leakage
796:welding
792:flanges
716:inconel
667:plastic
613:packing
465:boilers
438:pumping
379:dampers
337:volvere
258:scholar
233:"Valve"
152:scholar
127:"Valve"
3665:Valves
3660:Piping
3620:Radial
3610:Deltic
3256:Rotary
3174:Bourke
3062:Piping
2771:Urinal
2739:Shower
2245:O-ring
2218:Gasket
2075:Siphon
2065:Sewage
1773:Tubing
1743:Piping
1334:Images
1247:sample
1169:side.
1100:Valve
1060:X750.
1045:spring
1038:spring
1025:Spring
1015:nickel
957:torque
946:bonnet
788:cement
744:bonnet
738:Bonnet
675:bronze
608:bonnet
598:handle
537:Manual
457:piston
417:, and
260:
253:
246:
239:
231:
154:
147:
140:
133:
125:
3603:Other
3286:Wedge
3152:Axial
2674:Bidet
2636:Valve
2280:Putty
2250:Oakum
2241:(NPS)
2235:(NPT)
2214:(GHT)
2168:(BSP)
1363:wheel
1286:, or
1133:, or
1036:X750
953:force
919:, or
838:hinge
794:, or
764:Ports
759:Ports
704:monel
687:steel
671:Brass
577:ports
547:Motor
512:Types
505:valve
455:or a
445:lever
426:veins
333:valva
321:fluid
317:valve
265:JSTOR
251:books
159:JSTOR
145:books
3281:Watt
3216:Hemi
3157:Beam
3140:Type
3131:for
2751:Sink
2556:Pump
2145:Well
2035:Leak
1737:Pipe
1302:The
1108:and
1070:trim
1064:Trim
942:stem
940:The
936:Stem
917:EPDM
905:PTFE
853:Seat
819:Disc
784:glue
772:disc
730:and
728:PVDF
693:and
656:stem
648:trim
642:Body
592:disc
587:stem
582:seat
572:body
496:and
409:and
401:for
399:taps
372:HVAC
357:flow
237:news
131:news
3594:W30
3589:W24
3584:W18
3579:W16
3574:W12
3541:V24
3536:V20
3531:V18
3526:V16
3521:V14
3516:V12
3511:V10
3499:VR6
3487:VR5
3449:F16
3444:F12
3439:F10
3401:I14
3396:I12
1278:or
1019:ABS
978:or
970:or
921:FKM
913:NBR
865:at
840:or
770:or
720:PVC
665:or
600:or
355:or
220:by
114:by
3656::
3569:W8
3564:W6
3559:W3
3506:V8
3494:V6
3482:V5
3477:V4
3472:V3
3467:V2
3434:F8
3429:F6
3424:F4
3419:F2
3391:I9
3386:I8
3381:I7
3376:I6
3371:I5
3366:I4
3361:I3
3356:I2
3351:I1
1830:.
1143:.
1129:,
1125:,
1084:A
1009:,
915:,
798:.
790:,
786:,
782:,
778:,
742:A
726:,
724:PP
722:,
689:,
685:,
681:,
677:,
673:,
669:.
500:.
467:.
315:A
76:.
3635:X
3630:U
3615:H
3551:W
3121:e
3114:t
3107:v
1951:e
1944:t
1937:v
1859:.
1834:.
1269:.
927:.
897:.
566::
311:.
294:)
288:(
276:)
272:(
262:·
255:·
248:·
241:·
224:.
210:.
181:)
175:(
170:)
166:(
156:·
149:·
142:·
135:·
108:.
83:)
79:(
42:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
