Mini-Flow Control Valve

Pneumatic Mini-Flow Control Valve | Electric Mini-Flow Control Valve

ZHW Type Mini-Flow Control Valve Introduction

ZHW type mini-flow control valve is a kind of top pilot single seat valve, which has a simple structure, well sealing, high stable application performance. The top pilot system efficiently avoided the small opening vibration, extend the shelf life.


Pneumatic Mini-Flow Control Valve
Pneumatic Mini-Flow Control Valve
Electric Mini-Flow Control Valve
Electric Mini-Flow Control Valve
Body type:straight through casting globe type
Spool type:non-balanced single-seat plug type
Nominal size:DN15, 20, 25, NPS 1/2〞~ 1〞
Nominal pressure:PN16 ~ 100 CLASS 150LB ~ 600LB
Connection: flange:FF、RF、MF、RTJ
Flange dimension:acc. to IEC 60534
Bonnet type:(-45℃~ higher than 230℃ occasion)
Low temperature extended type(-196℃~ -45℃)
Bellow seal type
Warm insulation Jacket type
Packing:V type PFTE packing, flex. graphite packing, etc.
Gasket:Metal graphite packing
Actuator:pneumatic: multi-spring diaphragm actuator, piston type actuator.
electric: 3810L series smart actuator, PSL series actuator.
Surface painting:Green color, acrylic acid polyurethane ceramic paint.


ZActuatorHStructureNominal pressureBody materialNominal size
Z series control valveJ: pneumatic diaphragm
H: pneumatic piston
R: electric 3810L
D: electric PSL
Direct travelW: standard min-flow
WG: single seat with radiator
WV: single seat with bellow seal
WD: low-temperature single seat
150 LB
D= special
DN25= DN25
Such as: Z type pneumatic diaphragm min-flow control valve, pressure PN16,valve material WCB,nominal size DN50,type:  ZJHW-16C DN50


Flow characteristicLinear, percentage, quick open
Allowable range30: 1
Rated Cv valueCV 0.01~1.0
Allowable leakageMetal seal:  IV grade(0.01% rated capacity)
Leakage standard: GB/T 4213


Type/MethodPneumatic diaphragm actuatorElectric actuator
ZH23~ZH563810L series
 Multi-spring typeIntelligent integrated type
UsageRegulating type, an ON-OFF typeRegulating
Air supply pressure or Power supply voltageAir supply pressure (Spring range)
140(20~100)Kpa G
240 (40~200) Kpa G
280 (80~240) Kpa G
Power: AC 200V±10%  50Hz
Or Power: AC 380V±10% 50Hz
ConnectorAir pipe connector: RC1/4Normal type:  cable inlet 2-PF(G1/2〞)
Explosive proof type:  can install protection jacket PF(G3/4〞)
Positive actionPressure increase, stem descend, valve close.Input signal increase, stem descend, valve close.
Negative actionPressure increase, stem ascend, valve open.Input signal increase, stem ascend, valve open.
Input signal40~20mA.DC(with positioner)Input/output4~20mA.DC
Lag≤1%FS(with positioner)≤0.8%FS
Linear type2%FS(with positioner)+1%FS
Environmental temperature-10℃~+70℃Standard type: -10℃~+60℃
With space heater: -35℃~+60℃
Explosive proof: -10℃~+40℃
Surface coatingGreen, acrylic acid polyurethane ceramic coatingBlue, acrylic acid polyurethane ceramic coating
AccessoriesElectric-air (air-air) valve positioned, filter regulator, valve converter, solenoid valve, limited switchSpace heater (normal type)
Note: non-standard accessories, need special customized notes.

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