Control Valve

ZHCF Type PTFE Lined Control Valve

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Category : Control Valve. Tags : control valve, Linear actuator control valve

ZHCF type PTFE lined single seat control valve(Pneumatic / Electric) is a kind of bellow sealed single seat control valve. The internal PTFE (F46) lined is workable with high corrosion medium, such as: hydrochloric acid, sulfuric acid, nitric acid, hydrofluoric acid, etc.

PTFE lined control valve Specification

Body type: straight through casting globe type
Spool type: non-balanced single seat plug type
Nominal size: DN20~150 NPS 3/4〞~ 6〞
Nominal pressure: PN16 ~ 25 CLASS 150/300LB
Connection: flange: FF、RF、MF、RTJ
Bonnet type: PTFE lined bellow sealed
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 polyurthene ceramic paint.

PTFE lined control valve Code

Z Actuator H Structure Nominal pressure Body material Nominal size
Z series control valve J:  pneumatic diaphragm actuator
H: pneumatic piston actuator
R: electric 3810L actuator
D: electric PSL actuator
Hdirect travel CF:  standard PTFE lined control valve PN16=16
CL150LB=
150 LB
JIS10K=10K
C=WCB
LC=LCB
P=CF8
PL=CF3
R=CF8M
RL=CF3M
DN25= DN25
NPS1〞=NPS1〞
Such as: Z type pneumatic diaphragm PTFE lined control valve, pressure:  PN16,body material WCB,nominal size DN50,type: ZJHCF-16C DN50

PTFE lined control valve Performance

Flow characteristic Linear, percentage, quick open
Allowable range 30: 1
Rated Cv value Percentage CV6.3~400 ,linear CV6.9~440
Allowable leakage soft seal:  VI grade(foam grade)
Leakage standard:  GB/T 4213
Performance   Pneumatic Electric
Allowable tolerance, % ±1.5 ±1.0
Return difference, % ≤1.5 ≤1.0
Dead zone, % ≤0.6 ≤1.0
Difference from beginning to end point, % ±2.5 ±2.5
Rated travel difference, % ≤2.5 ≤2.5
Note : specification on the basis of control valve with positioned and PTFE packing.

PTFE lined control valve Special specification

Type/Method Pneumatic diaphragm actuator Electric actuator
ZH23~ZH56 3810L series
 Multi-spring type Intelligent integrated type
Usage Regulating type, ON-OFF type Regulating
Air supply pressure or Power supply voltage Air 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
Connector Air pipe connector: RC1/4 Nomal type:  cable inlet 2-PF(G1/2〞)
Explosive proof type:  can install protection jacket PF(G3/4〞)
Positive action Pressure increase, stem descend, valve close. Input signal increase, stem descend, valve close.
Negative action Pressure increase, stem ascend, valve open. Input signal increase, stem ascend, valve open.
Input signal 40~20mA.DC(with positioner) Input/output4~20mA.DC
Lag ≤1%FS(with positioner) ≤0.8%FS
Linear type 2%FS(with positioner) +1%FS
Environmental temperature -10℃~+70℃ Standard type: -10℃~+60℃
With space heater : -35℃~+60℃
Explosive proof: -10℃~+40℃
Surface coating Green, acrylic acid polyurethane ceramic coating Blue, acrylic acid polyurethane ceramic coating
Accessories Electric-air (air-air) valve positioned, filter regulator, valve converter, solenoid valve, limited switch Space hearter (normal type)
Note : non-standard accessories, need special customized notes.

PTFE lined control valve Parameter

Nominal size, DN 20 25 32 40 50 65 80 100 125 150
Rated flow coefficient, Cv Percentage   8 12 20 32 50 70 100 200 240
Linear 5 10 16 25 38 63 80 120 220 300
Travel 16mm 25 mm 40mm 60mm
Pneumatic actuator
Diaphragm effective area, Ae (cm2)
ZHA/B-22 ZHA/B-23 ZHA/B-34 ZHA/B-45
350 350 560 900
Action Spring range Max. allowable pressure difference(MPa)
Air open 20-100KPa 1.16 0.7 0.44 0.28 0.18 0.17 0.11 0.07 0.07 0.05
40-200 KPa 3.34 2.14 1.31 0.84 0.53 0.51 0.33 0.21 0.22 0.15
80-240 KPa 6.4 4.99 3.05 1.95 1.25 1.18 0.78 0.5 0.51 0.36
Air close 20-100KPa 2.23 2.14 0.87 0.56 0.35 0.34 0.22 0.14 0.15 0.1
40-200 KPa 6.4 6.4 5.86 3.64 2.3 2.21 1.43 0.91 0.95 0.66
80-240 KPa 6.4 6.4 6.4 5.04 3.18 3.06 1.98 1.26 1.32 0.92
Electric actuator Max. allowable pressure difference,(MPa)
Type Thrust(N)
3810L-08 800 2.38 1.52                
3810L-20 2000 4.77 3.05 1.86 1.19 0.76          
3810L-30 3000     2.79 1.79 1.14          
3810L-50 5000     4.66 2.98 1.91 1.13 0.6 0.47    
3810L-65 6500           1.35 0.8 0.57 0.39 0.26
3810L-99 10000                 0.61 0.42

PTFE lined control valve Material and internal structure

Body, bonnet WCB LCB CF8
Lined PTFE PTFE PTFE
Spool 304+ PTFE 304+ PTFE 304+ PTFE
Bellow seal PTFE
Stem 304 304 304
Studs, nut 304 304 304
PTFE lined control valve Internal structure