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SINGLE-SEAT PNEUMATIC CONTROL VALVE

SINGLE-SEAT PNEUMATIC CONTROL VALVE

SINGLE-SEAT PNEUMATIC CONTROL VALVE
CategoriesCONTROL VALVE
BrandKRV
ModelDN20-DN250
Update Time2021-06-17
Detail Information

Product features

Zjhp fine and small pneumatic single seat control valve is composed of pneumatic multi spring diaphragm actuator and low flow resistance single seat valve. The new actuator is low in height, light in weight, easy to install, compact in structure, unobstructed in flow passage, large in flow coefficient, reliable in action, small in seat leakage, accurate in flow characteristic and wide in adjustable range.

Main performance specifications

Main technical parameters of regulating mechanism

Nominal diameter(mm)202540506580100150200
Seat diameter(mm)10121520253240506580100125150200
Rated flow coefficient Kvstraight line1.82.84.46.91117.627.54469110176275440690
Equal percentage1.62.546.31016254063100160250400630
Nominal pressure(MPa)0.6   1.6   4.0   6.4
trip mm1016254060
Flow characteristicsStraight line, equal percentage
Medium temperature ℃-15~200、-40~250(Normal temperature type)、230~450(Medium temperature type)
Flange sizeCast iron flange size according to JB/T78,Cast steel flange size according to JB/T79
flange typeFlange sealing surface type JB/T77,The cast iron flange is smooth type and the cast steel flange is concave type
body materialPN(MPa)0.6,1.6WCB(ZG230-450)
4.0,6.4WCB(ZG230-450),ZG1Cr18Ni9Ti、ZG0Cr18Ni12Mo2Ti
Material of valve core1Cr18Ni9、0Cr18Ni12Mo2Ti
Type of upper valve coverCommon type (constant temperature type),hot plate type (medium temperature type)
Adjustable ratio R50:1
Air supply connectorM16*1.5

Note: ANSI, API, JIS and other foreign flange standard products can be provided for users, and the structural length can also be determined according to the needs of users.

Main technical parameters of actuator

modelZHA/ZHB-22ZHA/ZHB-23ZHA/ZHB-34ZHA/ZHB-45
Effective area cm²350350560900
trip mm16254060
Spring range KPa20~100(标准);40~200;80~240;20~60;60~100

Drawing of pneumatic single seat control valve


Main connecting dimensions of pneumatic single seat control valve

Nominal diameter

(DN)

LHH1weight(Kg)ΦA
PN6/16PN40PN64ordinaryhigh temperaturePN6PN16PN40PN64PN6/16PN40/64
201841942063985484552651923285
251851972104105605057702024
322002102204185785670782431
402222352514556206575852635
502542672864756277082903040
6527629231161079080921024766360
80298317337622807951001075578
1003523683946408501051101171256599
1254104254408641122120125135148120140
1504514735088701130132142150175130160470
2006006206508901150160170187207175250
25065067069012031523187202225235350470580
30074077080012341554220230257265500660

Material of main parts of pneumatic single seat control valve


Part nameMaterial Sciencetemperature range
Body / bonnetHT200-15~200℃
WCB-20~425℃
ZG1Cr18Ni9Ti-40~550℃
ZG0Cr18Ni12Mo2Ti-40~600℃
Spool / seat1Cr18Ni9-40~550℃
0Cr18Ni12Mo2Ti-40~550℃
fillerteflon PTFE-40~200℃
diaphragmNBR clip reinforced polyester fabric 
Compression spring60Si2Mn 
Membranous capA3
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