Self-Operated Pressure Regulating Valve
Self-Operated Pressure Regulating Valve
Self-Operated Pressure Regulating Valve

Self-Operated Pressure Regulating Valve

  • No external energy source required – powered by the medium’s own energy for automatic pressure regulation
  • Pressure-closing (B) and pressure-opening (K) types for gas, steam and low-viscosity liquids
  • DN20-DN200, PN1.6-6.4 MPa; condenser and cooling fin options available

Category

Overview

ZZYP self-operated pressure regulating valve requires no external energy source. The controlled medium itself acts as the power source: it enters the actuator diaphragm chamber to generate thrust and drive the throttling element for automatic regulation. It combines the functions of measurement, actuation and control, and can be used where no compressed air or electricity is available. It is widely used in automatic control systems in the petroleum, chemical, power, light industry and printing & dyeing industries for automatic pressure reduction and stabilization (downstream pressure regulation) as well as pressure relief and stabilization (upstream pressure regulation) of gas, liquid and steam in various equipment. Different trim structures and actuators can be selected according to the user’s working conditions to achieve the optimal control effect.

Product Models

Category
Model
Category
Model
Single-seat pressure-closing type ZZYP-16～64B Single-seat pressure-opening type ZZYP-16～64K
Double-seat pressure-closing type ZZYN-16～64B Double-seat pressure-opening type ZZYN-16～64K
Cage pressure-closing type ZZYM-16～64B Cage pressure-opening type ZZYM-16～64K

Note: 1. The pressure-closing type is used for downstream pressure regulation. When the downstream pressure rises, the valve closes to achieve pressure reduction and stabilization. 2. The pressure-opening type is used for upstream pressure regulation. When the upstream pressure rises, the valve opens to achieve pressure relief and stabilization.

Technical Parameters

Nominal Diameter DN (mm)
20
25
32
40
50
65
80
100
125
150
200
Seat Diameter DN (mm) 10 12 15 20
Rated Flow Coefficient Kv 1.8 2.4 4.4 4 11 20 30 48 75 120 190 300 480 760
Allowable Differential Pressure (MPa) 2.5 2.0 1.6 1.0
Nominal Pressure (MPa) 1.6 4.0 6.4
Inherent Flow Characteristic Quick opening
Minimum Differential Pressure P for Reliable Operation (MPa) 0.05
Pressure Setting Range (kPa) 15～50 40～80 60～100 80～140 120～180 160～220 200～260 240～300 280～350 330～400 380～450 430～500 480～560 540～620 600～700 680～800 780～900 800～1000 900～2000
Working Temperature (℃) Liquid ≤140; gas ≤80; with condenser and cooling fin ≤350
Suitable Media Gas, steam, low-viscosity liquids
Flange Dimensions & Type PN10, 16, 40 GB9113-88; PN64 JB/T79-94; PN10, 16 raised face; PN40, 64 concave face. Other flange standards (e.g., ANSI, JIS, DIN) available on request.
Face-to-Face Dimension Conforming to GB12221-89
Available Accessories Condenser (for steam service), cooling fin, etc.
Actuator Signal Connection Internal thread M16×1.5

Performance Specifications

Control Accuracy (%) ±8
Allowable Leakage Metal seat (L/h) Single-seat (Class IV): ≤10-4 of rated flow capacity; double-seat, cage (Class II): ≤5×10-3 of rated flow capacity
Soft seat (ml/min) DN (mm)
20 25 32 40 50 65 80 100 125 150 200
0.15 0.3 0.45 0.6 0.9 1.7 4.0 6.75

Overall Dimensions & Weight

Nominal Diameter DN
20
25
32
40
50
65
80
100
125
150
200
L PN16, 40 150 160 180 200 230 290 310 350 400 480 600
PN64 230 230 260 260 300 340 380 430 500 550 650
B 233 332 373 522 673 980 1200
H Pressure Setting Range (MPa) 15～140 475 520 540 710 780 840 880 915
120～300 455 500 520 690 760 800 870 880
280～500 450 490 510 680 750 790 860 870
480～1000 445 480 670 740 780 850 860
600～1500 445 570 600 820 890 950 950 1000
1000～2500 445 570 600 820 890 950 950 1000
A Pressure Setting Range (MPa) 15～140 φ282 φ308
120～300 φ232
280～1000 φ196 φ196 φ282
600～2500 φ85 φ96
Approx. Weight (Kg) 26 37 42 72 90 114 130 144 180
Impulse Pipe Connection Thread M16×1.5

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