222:. Globe valves are mainly used for corrosive or high viscous fluids which solidify at room temperature. This is because straight valves are designed so that the outlet pipe is in line with the inlet pipe and the fluid has a good chance of staying there in the case of horizontal piping. In the case of angle valves, the outlet pipe is directed towards the bottom. This allows the fluid to drain off. In turn, this prevents clogging and/or corrosion of the valve components over a period of time. A globe valve can also have a body in the shape of a "Y". This will allow the construction of the valve to be straight at the bottom as opposed to the conventional pot type construction (to arrange bottom seat) in case of other valves. This will again allow the fluid to pass through without difficulty and minimizes fluid clogging/corrosion in the long term.
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packing is a wearable material and will have to be replaced during maintenance. With a smooth stem the ends are threaded to allow connection to the plug and the actuator. The stem must not only withstand a large amount of compression force during valve closure, but also have high tensile strength during valve opening. In addition, the stem must be very straight, or have low run out, in order to ensure good valve closure. This minimum run out also minimizes wear of the packing contained in the bonnet, which provides the seal against leakage. The stem may be provided with a shroud over the packing nut to prevent foreign bodies entering the packing material, which would accelerate wear.
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offer advantages such as simpler design, with potential leakage only at the seat, and usually lower cost. However, they are limited in size, as larger unbalanced plugs may require impractical forces to seal and control flow. On the other hand, balanced plugs feature holes through the plug itself. They offer advantages such as easier shut-off due to reduced static forces required. However, they introduce a second potential leak path between the plug and the cage, and they tend to be more expensive.
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The cage is a part of the valve that surrounds the plug and is located inside the body of the valve. Typically, the cage is one of the greatest determiners of flow within the valve. As the plug is moved more of the openings in the cage are exposed and flow is increased and vice versa. The design and
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containing structure of the valve and the most easily identified as it forms the mass of the valve. It contains all of the valve's internal parts that will come in contact with the substance being controlled by the valve. The bonnet is connected to the body and provides the containment of the fluid,
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The stem serves as a connector from the actuator to the inside of the valve and transmits this actuation force. Stems are either smooth for actuator controlled valves or threaded for manual valves. The smooth stems are surrounded by packing material to prevent leaking material from the valve. This
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The valve's closure mechanism involves plugs that connect to a stem, which is adjusted either by sliding or screwing it up or down to regulate flow. Plugs come in balanced or unbalanced types. Unbalanced plugs, typically solid, are suitable for smaller valves or those with low pressure drops. They
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The bonnet provides a leakproof closure for the valve body. The threaded section of the stem goes through a hole with matching threads in the bonnet. Globe valves may have a screw-in, union, or bolted bonnet. Screw-in bonnet is the simplest bonnet, offering a durable, pressure-tight seal. Union
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The seat ring provides a stable, uniform and replaceable shut off surface. Seat are usually screwed in or torqued . This pushes the cage down on the lip of the seat and holds it firmly to the body of the valve. Seat may also be threaded and screwed into a thread cut in the same area of the body.
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are openings in the body for fluid flowing in or out. The two ports may be oriented straight across from each other or anywhere on the body, or oriented at an angle (such as a 90°). Globe valves with ports at such an angle are called
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However this method makes removal of the seat ring during maintenance difficult if not impossible. Seat rings are also typically beveled at the seating surface to allow for some guiding during the final stages of closing the valve.
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Although globe valves in the past had the spherical bodies which gave them their name, many modern globe valves do not have much of a spherical shape. However, the term
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270:, pressures that are in a range). Cages are also used to guide the plug to the seat of the valve for a good shutoff, substituting the guiding from the bonnet.
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under heading "McGraw-Hill
Professional – Architecture" diagram shows disc. See diagram of "straight body" globe valve with bolted bonnet here.
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at the bottom of the disc for the seating surface, so that rubber can be compressed against the seat to form a leak-tight seal when shut.
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layout of the openings can have a large effect on flow of material (the flow characteristics of different materials at
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McGraw-Hill
Dictionary of Scientific and Technical Terms. McGraw-Hill Companies (25 April 2007).
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may refer to valves which are used to stop flow even when they have other mechanisms or designs.
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Economical globe valves or stop valves with a similar mechanism used in plumbing often have a
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in manual valves. Typically, automated globe valves use smooth stems rather than
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Globe valves are named for their spherical body shape with the two halves of the
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can be screwed in to close (or shut) the valve. The plug is also called a
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is still often used for valves that have such an internal mechanism. In
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International
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Control Valve
Handbook – Fisher Controls International (4th Edition)
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Globe Valve Disks. See diagram of angle globe valve here.
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http://www.tpub.com/content/doe/h1018v2/css/h1018v2_37.htm
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since they don't have the spherical housing, but the term
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74:. In globe valves, the plug is connected to a
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189:Internal parts of a typical globe valve
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62:. This has an opening that forms a
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539:
536:
534:
531:
530:
528:
522:
518:
511:
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504:
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497:
492:
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488:
481:
477:
473:
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467:
464:
461:
459:
458:
446:
441:
434:
429:
427:
412:
408:
402:
387:
383:
379:
372:
364:
363:
358:
351:
347:
336:
333:
331:
328:
326:
323:
321:
318:
316:
315:Control valve
313:
311:
308:
306:
303:
302:
291:
287:
285:
284:rubber washer
280:
271:
269:
258:
250:
241:
232:
223:
221:
216:
212:
207:
205:
201:
196:
187:
172:
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147:
141:
140:
135:This section
133:
129:
124:
123:
115:
113:
109:
105:
101:
91:
89:
85:
81:
77:
73:
69:
65:
61:
57:
52:
50:
46:
42:
38:
34:
30:
21:
1518:Pipe marking
1491:and services
1487:Professions,
1435:Strap wrench
1375:Basin wrench
1354:Water heater
1349:Water filter
1262:Flush toilet
1237:Dehumidifier
1179:Trench drain
1159:Street elbow
1149:Safety valve
1134:Relief valve
1074:Needle valve
1059:Grinder pump
1048:
1029:Flow limiter
1014:Float switch
949:Chopper pump
929:Booster pump
878:Tube bending
823:Pipe support
688:Water hammer
668:Thermosiphon
598:Neutral axis
440:
414:. Retrieved
410:
401:
390:. Retrieved
381:
376:Thunli, XA.
371:
360:
350:
330:Needle valve
281:
277:
268:temperatures
264:
255:
238:
235:Plug or disc
229:
219:
214:
208:
192:
164:
155:
144:Please help
139:verification
136:
111:
107:
99:
97:
75:
71:
67:
63:
55:
53:
28:
26:
1463:Flow sensor
1451:and control
1449:Measurement
1440:Tap and die
1415:Pipe wrench
1400:Driving cap
1292:Laundry tub
1169:Tap (valve)
1154:Sewage pump
1139:Riser clamp
1084:Pinch valve
1054:Grease trap
1049:Globe valve
1039:Flushometer
1024:Floor drain
1019:Float valve
939:Check valve
924:Bleed screw
698:Water table
638:Storm sewer
524:Fundamental
362:Answers.com
335:Pinch valve
108:stop valves
100:globe valve
94:Information
29:globe valve
23:Globe valve
1660:Categories
1523:Pipefitter
1410:Pipecutter
1390:Core drill
1277:Humidifier
1242:Dishwasher
1204:Zone valve
1199:Water tank
1044:Gate valve
919:Ball valve
892:Components
712:Technology
683:Wastewater
643:Stormwater
416:2019-08-23
392:2023-11-30
342:References
325:Gate valve
305:Ball valve
112:stop valve
90:assembly.
33:ball valve
1542:Industry
1528:Pipelayer
1385:Borescope
1380:Blowtorch
1319:Sump pump
853:Soldering
818:Pipe dope
781:Hydronics
653:Tap water
618:Sewer gas
583:Heat trap
578:Greywater
548:Corrosion
80:handwheel
49:spherical
1608:See also
1594:Scalding
1282:Icemaker
1069:Manifold
628:Sewerage
608:Pressure
563:Fuel gas
538:Backflow
526:concepts
517:Plumbing
482:website.
472:Archived
386:Archived
298:See also
195:pressure
104:plumbing
88:actuator
84:threaded
45:pipeline
1533:Plumber
1489:trades,
1430:Plunger
1339:Washlet
1227:Bathtub
1129:Reducer
959:Cistern
863:Swaging
843:Sealant
719:Brazing
357:"Globe"
1671:Valves
1666:Piping
1620:Piping
1329:Urinal
1297:Shower
803:O-ring
776:Gasket
633:Siphon
623:Sewage
226:Bonnet
211:valves
204:slurry
60:baffle
51:body.
1232:Bidet
1194:Valve
838:Putty
808:Oakum
799:(NPS)
793:(NPT)
772:(GHT)
726:(BSP)
215:Ports
202:, or
43:in a
37:valve
1309:Sink
1114:Pump
703:Well
593:Leak
274:Seat
261:Cage
244:Stem
181:Body
76:stem
72:disc
68:plug
64:seat
56:body
41:flow
200:gas
148:by
1662::
425:^
409:.
384:.
380:.
359:.
27:A
509:e
502:t
495:v
419:.
395:.
365:.
171:)
165:(
160:)
156:(
142:.
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