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DN20 25 32 40 50 65 80 100 125 150 Pilot Operated Pressure Control Valve
DN20 25 32 40 50 65 80 100 125 150 Pilot Operated Pressure Control Valve
Specifications
Brand Name :
WEYO
Model Number :
V500-ZZHP
Place of Origin :
China
MOQ :
Negotiable
Price :
Based on oroiect reauirements
Payment Terms :
L/C, T/T
Supply Ability :
5000 units per month for small parts. 1000 units per month for large parts
Delivery Time :
7 - 15 days for small orders, 15 - 30 days for large orders
Packaging Details :
Customized packaging to protect products
Body Type :
Globe
Valve Size :
DN20,25,32,40,50,65,80,100,125,150 (¾”,1”,1¼”,1½”,2”,2½”,3”,4”,5”,6”)
Pressure Rating :
PN10,16(ANSI Class 150)
End Connection :
Flanged: RF
Flanged Standard :
GB/T 9113.1,JB/T 79.1,HG/T 20592,HG/T 20615,SH 3406,ANSI B16.5
Body & Bonnet Materials :
A216 WCB A351 CF8, A351 CF8M, A351 CF3, A351 CF3M
Trim Materials :
A182 F304, A182 F316, A182 F304L, A182 F316L, PTFE Sealing surface or full stellite alloy overlay welding, PTFE embedded are available
O-Ring :
Oil resistance rubber, PTFE
Bonnet Type :
Standard type
Plug Type :
Flat bottom, Unbalanced
Seat Leakage Standard :
GB/T 4213, ANSI B16.104
Leakage :
Class IV, VI (Soft sealing)
Flow Characteristic :
Quick open
Regulation Accuracy :
≤ ±5%
Regulation Type :
Outlet regulation(B), Inlet regulation(K)
Pressure Setting Range :
0.5~100 kPa
Medium Temperature :
-40~80℃
Pneumatic Diaphragm Actuator :
Acting type: Direct acting, Diaphragm effective area(cm2 ): 200,280,400 , Diaphragm materials: NBR, Viton clip reinforced polyester fabric, Diaphragm cover material: Q235,Q235 PTFE applied
Description
ZZHP Series Pilot-Operated Pressure Control Valve needs no external energy; the medium’s own energy is used as the power source and then introduced into the pilot to control the main valve spool displacement in order to change medium flow, therefore the outlet pressure (B type) or the inlet pressure (K type) remains constant.
Pilot-Operated Pressure Control Valve has the following characteristics:
Pressure set is implemented on the pilot, thus easy, convenient and time-saving. Moreover it can be set at any time under continuous production conditions.
The pressure regulation range is wider than ZZY Self-Operated Pressure Control Valve with particularly large pressure ratio, for example inlet pressure: 0.8MPa, outlet pressure: 50mmH2O, the pressure ratio is up to 1600.
The regulation accuracy is higher than ZZY Self-Operated Pressure Control Valve with large pressure sensing diaphragm effective area, small spring stiffness, particularly sensitive response action, extremely low pressure (50mmH2O) or pressure change can be sensed, smooth device operation, therefore it is suitable for applications requiring high precision control.
No packing construction is adopted to reduce stem friction and obtain small dead zone.
ZZHP-16B is primarily suitable for high inlet pressure (0.2~0.8MPa) and low outlet pressure (0.5~100kPa, for example 50mmH2O) and can replace one ZZYP Self-Operated Pressure Control Valve and one ZZVP Self-Operated Micropressure Control Valve; ZZHP-16K can be used for Nitrogen vent device together with ZZHP-16B (used for Nitrogen supply device). ZZHP-16K alone can replace ZZVP Self-Operated Micropressure Control Valve (inlet pressure ≤ 0.1MPa), however ZZHP-16K Pilot-Operated Pressure Control Valve is not restricted by the above.
Rated Cv, Stroke and Allowable Pressure Drops

Valve
size
mm(inch)
Port
size
(mm)
Rated
Kv
Rated
Cv
Stroke
(mm)
Allowable
pressure
drops(MPa)
Valve size
mm(inch)
Port
size
(mm)
Rated
Kv
Rated
Cv
Stroke
(mm)
Allowable
pressure
drops(MPa)
20 (¾) 6 0.32 0.37 8 1.6 32 (1¼) 32 12.5 14.5 10 1.6
15 4 4.6 40 (1½) 40 20 23
20 5 5.8 50 (2) 50 32 37 12 1.1
25 (1) 6 0.32 0.37 8 1.6 65 (2½) 65 50 58 15 0.4
15 4 4.6 80 (3) 80 80 93 18
20 5 5.8 100 (4) 100 125 145 20 0.6
25 8 9.3 125 (5) 125 160 186 30
6 (150) 150 320 371 40

Flow Characteristics
DN20 25 32 40 50 65 80 100 125 150 Pilot Operated Pressure Control Valve
Quick open
Valve Internal Construction
DN20 25 32 40 50 65 80 100 125 150 Pilot Operated Pressure Control Valve
Fig. 1 ZZHP-16B Outlet pressure regulating fig. 2 ZZHP-16K Inlet pressure regulating
(nitrogen supply device) (nitrogen vent device)
Working Principle
Nitrogen supply device construction is shown in figure 1, the fluid, located at the top of the
tank, is introduced through the impulse pipe to the testing unit, the force caused by the fluid on
the testing unit is equilibrium to the preload of the spring. When the pressure inside the tank is
lowered to the setting point of the nitrogen supply device, the balance is broken and the pilot
plug is opened, therefore the main valve plug is opened after the inlet gas goes into the upper
and lower diaphragm cover through the air filter regulator and the throttle valve and then the
nitrogen is supplied into the tank; when the pressure inside the tank is up to the setting point,
the spring preload of the testing unit makes the pilot plug close, then the main valve plug is
also closed thus the nitrogen supplement is stopped.
Nitrogen vent device construction is shown in figure 2, the working principle is basically the
same as nitrogen supply device, the fluid is introduced into the lower diaphragm cover of the
test unit, when the pressure inside the tank is up to the setting point, the pilot plug is opened
then the main valve plug is also opened, the vent begins. When the pressure is lowered to the
setting point, the main valve is closed then the vent ends.
External Dimensions and Weight
DN20 25 32 40 50 65 80 100 125 150 Pilot Operated Pressure Control Valve
公称通径
Valve size
mm(inch)		 20
(¾)		 25
(1)		 32
(1¼)		 40
(1½)		 50
(2)		 65
(2½)		 80
(3)		 100
(4)		 125
(5)		 150
(6)
A 150 160 180 200 230 290 310 350 400 480
H 640 640 650 650 660 700 700 750 800 800
H1 85 85 100 100 110 140 150 165 200 225
H2 390 390 390 435 435 435 435 435 565 565
ØB 308 308 308 394 394 394 394 394 498 498
重量(kg)
Weight		 26 26 35 40 50 72 90 114 130 144
Application Example (For Nitrogen Seal Device)
DN20 25 32 40 50 65 80 100 125 150 Pilot Operated Pressure Control Valve
Nitrogen is on the upper end of the refined oil inside the tank, the pressure, usually around
100mmH2O, is controlled by the nitrogen seal device. When the outlet valve opens, the inner tank
level drops in the meantime ZZHP-16B nitrogen supply valve is opened to supply nitrogen into
the tank, until the pressure is up to the setting point; when the inlet valve opens, the level ups, the
nitrogen pressure increases and then ZZHP-16B nitrogen supply valve is closed. ZZHP-16K nitrogen
vent valve is opened under the pressure controller; the nitrogen is released until the pressure is
lowered to the setting point. To ensure the safety of the tank, it shall be provided with breather valve
at the tank top.
Nitrogen supply pressure P2 setting: the setting point P2 is selected, for example 1kPa (100mmH2O),
is adjusted by the pressure setting spring.
Nitrogen vent pressure Po setting: adjust the pressure controller and adjust the pressure setting
spring pre-compression set, Po should be much higher than P2, for example 2kPa (200H2O), to avoid
the frequent open and close.
Breather valve pressure Pb setting: when the nitrogen supply and nitrogen vent pressure is set, to
avoid the frequent open and close, breather valve pressure Pb should be higher than Po, and the
difference between the pressures cannot be too small, for example 3kPa (300mmH2O).
Nitrogen supply pressure P2, nitrogen vent Po and breather valve pressure Pb: Pb>Po>P2.
1. The pressure position of ZZHP-16B nitrogen supply valve should be near the tank.
2. The pressure gauge should be close to the pressure point.
3. ZZYP-16B nitrogen supply valve outlet pipeline should be bigger than inlet pipeline
External Dimensions and Weight
DN20 25 32 40 50 65 80 100 125 150 Pilot Operated Pressure Control Valve

Valve size
mm(inch)		 20
(¾)		 25
(1)		 32
(1¼)		 40
(1½)		 50
(2)		 65
(2½)		 80
(3)		 100
(4)		 125
(5)		 150
(6)
A 150 160 180 200 230 290 310 350 400 480
H 640 640 650 650 660 700 700 750 800 800
H1 85 85 100 100 110 140 150 165 200 225
H2 390 390 390 435 435 435 435 435 565 565
ØB 308 308 308 394 394 394 394 394 498 498
重量(kg)
Weight		 26 26 35 40 50 72 90 114 130 144
Application Example (For Nitrogen Seal Device)
DN20 25 32 40 50 65 80 100 125 150 Pilot Operated Pressure Control Valve
Nitrogen is on the upper end of the refined oil inside the tank, the pressure, usually around
100mmH2O, is controlled by the nitrogen seal device. When the outlet valve opens, the inner tank
level drops in the meantime ZZHP-16B nitrogen supply valve is opened to supply nitrogen into
the tank, until the pressure is up to the setting point; when the inlet valve opens, the level ups, the
nitrogen pressure increases and then ZZHP-16B nitrogen supply valve is closed. ZZHP-16K nitrogen
vent valve is opened under the pressure controller; the nitrogen is released until the pressure is
lowered to the setting point. To ensure the safety of the tank, it shall be provided with breather valve
at the tank top.
Nitrogen supply pressure P2 setting: the setting point P2 is selected, for example 1kPa (100mmH2O),
is adjusted by the pressure setting spring.
Nitrogen vent pressure Po setting: adjust the pressure controller and adjust the pressure setting
spring pre-compression set, Po should be much higher than P2, for example 2kPa (200H2O), to avoid
the frequent open and close.
Breather valve pressure Pb setting: when the nitrogen supply and nitrogen vent pressure is set, to
avoid the frequent open and close, breather valve pressure Pb should be higher than Po, and the
difference between the pressures cannot be too small, for example 3kPa (300mmH2O).
Nitrogen supply pressure P2, nitrogen vent Po and breather valve pressure Pb: Pb>Po>P2.
1. The pressure position of ZZHP-16B nitrogen supply valve should be near the tank.
2. The pressure gauge should be close to the pressure point.
3. ZZYP-16B nitrogen supply valve outlet pipeline should be bigger than inlet pipeline.
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DN20 25 32 40 50 65 80 100 125 150 Pilot Operated Pressure Control Valve

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Product Detail
Brand Name :
WEYO
Model Number :
V500-ZZHP
Place of Origin :
China
MOQ :
Negotiable
Price :
Based on oroiect reauirements
Payment Terms :
L/C, T/T
Contact Supplier
DN20 25 32 40 50 65 80 100 125 150 Pilot Operated Pressure Control Valve

WEYO AUTO TECH

Verified Supplier
2 Years
shanghai, shanghai
Since 2003
Business Type :
Manufacturer, Seller
Main Products :
Control Valves, Servo Valves, Proportional Valve
Total Annual :
141790014-161450000
Employee Number :
1000~1200
Certification Level :
Verified Supplier
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