Self Actuated Control Valve ZZYP Serial

BCST ZZYP serial self-actuated control valve does not require any external energy sources. It is adjusted by flow medium automatically. It has the advantages of using no electricity and no gas source site.

  • Price Term: FOB/CIF/EXW/DAP
  • Package: Exported Wooden case or according to customer request
  • Delivery Time:  7 to 10 working days
  • Transports: By sea, by air, by high express
  • Shipment Port: Shanghai Port
  • Origin of Place: Jiangsu
  • Warranty: 12 Months

BCST ZZYP serial self-actuated control valve can be adjusted the pressure setting during operation. The quick opening flow characteristics are sensitive and of good sealing performance. It is widely used in petroleum, chemical, electric power, metallurgy, food, textile, machinery manufacturing, and residential construction buildings, and other industrial equipment for the medium of gas, liquid, and steam. And they have the function of pressure reducing (for valve adjustment) or relief, regulating pressure (before adjustment for the valves), and automatically controlling.

  • Diaphragm type with sensitivity adjustment and fast response of the  pressure change
  • Piston cylinder with high-pressure resistance and large adjustable travel
  • Single-seat control valve, sleeve valve types for wide-range control
  • For controlling the downstream pressure


Body Type Single seated, globe type
Size DN15~DN250 (3/4″ to 10″)
Pressure Class 1.6, 4.0, 6.4 Mpa;
  ANSI 150, ANSI 300, ANSI 600
Characteristics Quick open
Body Materials WCB, CF8M, CF3M, CF3
Trim materials Stainless Steel
Temp range – 5°C to ~ +70°C
Connection Flanged, Socket welding, Butt welding
Gland packing PTFE, Braided PTFE, Grafoil
Actuator Pneumatic diaphragm actuator, Piston
Accuracy Within ±5%
Diameter  DN 15 20 25 32 40 50 65 80 100 125 150 200 250
 Rated Flow Factor  KvS 4 6.3 8 16 20 32 50 80 125 160 280 320 400
Noise factor Z Value 0.6 0.6 0.6 0.55 0.55 0.5 0.5 0.45 0.4 0.35 0.3 0.2 0.2
Allowable Differential pressure


PN16 1.6 1.5 1.2 1.0
PN40 4.0
 Active Area(cm)2 32※ 80 250 630
Setted pressure range (MPa) 0.8~1.6






Min pressure △Pmin(MPa) ≥0.05 ≥0.04 ≥0.01 ≥0.005
 Max differential pressure (MPa) 2 1.25 0.4 0.15
Material Diaphragm cover: Galvanized steel; Diaphram: EPDM or FKM fiber
 Control pipeline, adaptor Copper pipe or steel pipe 10×1; Ferrule type connector: R1/4 “

Note:※This pressure range is not for DN150 to DN250

 Set allowable error ±8%
 Allowable leakage


Metal seal 4×0.01% rated capacity
Soft seal DN15~50 DN65~125 DN150~250
10气泡/min 20气泡/min 40气泡/min
Diameter 15~125mm 150~250mm
 Seal type Metal seal ≤150℃ ≤140℃
 Cooling tank ≤200℃  Cooling tank& length pipe ≤200℃
Cooling tank & fin ≤350℃  Cooling tank& length pipe≤300℃ ※
Soft Seal ≤150℃

Note: ※ the allowable working temperature for valve, only when the medium is a valve, if the working temperature reaches 350 °C, please select PN 40 valve body.


Structure Self Actuated Control Valve-Manual

1 Body 2 Seat 3 Shaft 4 Bonnet 5 Diaphragm cover 6 Diaphragm
7 Spring 8 Adjusting nut 9 Guided pipe 10 Bellow 11 Balance diaphragm 12  Charging valve

Dimension Self Actuated Control Valve-Manual

DN (mm) 15 20 25 32 40 50 65 80 100 125 150 200 250
L (mm) 130 150 160 180 200 230 290 310 350 400 480 600 730
B (mm) 212 212 238 238 240 240 275 275 380 380 326 354 404
Weight (Kg) 6.2 6.7 9.7 13 14 17 29 33 60 70 80 140 220
B1 (mm) 630 855 1205
Weight  (Kg) 140 210 300


 Active Area(cm)2 32 80 250 630
R (mm) 172 172 263 380
H (mm) 435 430 470 520
Weight  (Kg) 7.5 7.5 13 28
  1. Model and Name
  2. DN(mm) Diameter
  3. Working pressure
  4. Flow Characteristic
  5. Body material
  6. Rate Flow rate Factor
  7. Medium and working temperature
  8. Inlet and outlet pressure (differential pressure )
  9. Control signal
  10. another special requirement


ZZYP Structure type Nominal pressure Body material Mode of action Condensator Pressure control scope (KPa) Nominal diameter
Self-operation control valve P: Single seat

M:Sleeve type


CL150LB=150 LB







D=Special material


Backstream pressure control


Upstream pressure control

No: without

C: with condensator

15~50 40~80

60~140 120~220

160~220 200~260

240~300 280~350

330~400 380~450

480~560 540~620

600~700 680~800

780~900 880~1000

950~1500 1000~2500

DN50= DN50


For example Single self-operated control valve, Nominal pressure PN16, WCB material, without condensation, pressure scope: 120—220KPa. Size DN50, Model : ZZYP-16C-B-120~220-DN50

Installation, use, and maintenance

1. Installation

When the valve is used at room temperature (≤ 80°C) in gas or low viscosity liquid media, it is the same as the usual pneumatic film control valve installed upright on a horizontal pipe, as shown in the figure below.

Installstion Self Actuated Control Valve-Manual

A.ZZYP-16B Type Self-operated pressure regulating valve

  1. Globe valve  2. Pressure Gauge   3. Filter  4. Self-operated pressure regulating valves        5. Pressure GaugeInstallstion Self Actuated Control Valve-Manual

If the medium used is steam, the self-operated pressure regulating valve should be installed upside down on a horizontal pipe, as shown below.

Installstion Self Actuated Control Valve-Manual

When installing, pay attention to the following points:

  1. The condenser must be above the actuator of the regulator and below the post-valve (post-valve regulator) or pre-valve (pre-valve regulator) receiver to ensure that the condenser is filled with condensate.
  2. The pressure point should be taken at a suitable location from the regulator, the pre-valve regulator should be greater than two times the diameter of the pipe, and the post-valve regulator should be more significant than six times the diameter of the tube.
  3. on-site maintenance and operation, the regulator should be surrounded by appropriate space, and a

Installstion Self Actuated Control Valve-Manual

Note The dotted line in the diagram indicates the alternative permissible orientation of the pipe entrances and exits

4. If the diameter of the regulator is too large (DN ≥ 100), there should be a fixed bracket.

5. The direction of media flow is the same as the arrow on the valve body. The center of the pipe before and after should be aligned with the center of the two flanges of the regulator to avoid excessive stress on the valve body.

6. A filter should be installed in front of the valve to prevent blockage by impurities in the medium.

7. Control valves should be installed at ambient temperatures not exceeding -25°C to 55°C.

2. Use

Operating procedures when using gases or low viscosity liquids at room temperature

  1. Slow opening of the shut-off valve before and after the valve.
  2. Loosen the vent plug until the gas or liquid escapes from the actuator.
  3. Then retighten the vent plug, and the regulator is ready for operation. The required pressure value can be obtained by adjusting the pressure regulating disc. When revising, pay attention to the pressure indication and move slowly so that the valve stem does not follow the rotation.

Operating procedures when using steam:

  1. Unscrew the liquid filling port screw from the condenser.
  2. Unscrew the actuator exhaust plug.
  3. Use the leaky tip to add water through the fill port until it flows out of the vapor discharge hole.
  4. Tighten the venting plug and continue filling until it overflows the fill port.
  5. Tighten the liquid filler screw.
  6. Slowly open the shut-off valves before and after the regulator.
  7. Adjust the pressure adjustment dial and observe the pressure indication until the required value is reached.


After the control valve is put into operation, the general maintenance workload is minimal, usually as long as the observation of the valve before, after the valve pressure value is in line with the process. The required value can be observed. In addition, keep whether the stuffing box and the actuator are leaking, and if they are leaking, tighten or replace the packing and diaphragm.



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