Instructions for the use of self-operated pressure regulating valves
ZZY type self-operated pressure regulating valve (ZZY self-operated regulating valve) does not need to add additional energy, and uses the energy of the adjusted medium as the power source to introduce the actuator to control the position of the valve core, and changes the pressure difference and flow at both ends of the bend to stabilize the pressure in front of the valve (or behind the valve). It has the advantages of sensitive action, good sealing, and small fluctuation force at the pressure set point, and is widely used in the automatic control of gas, liquid and steam medium pressure reduction and pressure regulation or pressure relief and regulation.
This series of products has three structures: single seat (ZZYP), sleeve (ZZYM), double (ZZYN), and three structures; There are two types of actuators: membrane type and piston type; There are two types of pressure adjustment: pressure adjustment after the valve for pressure reduction (type B) and pressure adjustment for pressure relief (type K). The nominal pressure level of the product is PN16, 40, 64; the valve body diameter range DN20~300; There are three levels of leakage volume: level II, class IV and class VI; The flow characteristics are quick opening; The pressure is segmented from 15~2500Kpa. It can be combined to meet the requirements of user working conditions as needed.
Product features of self-operated pressure regulating valves
Self-operated pressure regulating valves do not require additional energy and can work in places without electricity and gas, which is convenient and energy-saving.
The pressure segment range is fine and intersecting, and the adjustment accuracy is high.
The pressure setpoint can be set continuously during operation.
For the pressure adjustment after the valve, the ratio of the pressure in front of the valve to the pressure behind the valve can be 10:1~10:8.
Rubber diaphragm detection, actuator measurement accuracy is high and action is sensitive.
The pressure balance mechanism is used to make the control valve responsive and precise control.
Self-powered pressure regulating valve parts material
Valve body: ZG230-450, ZG1Cr18Ni9Ti, ZGCr18Ni12Mo2Ti
Valve spool: 1Cr18Ni9Ti, Cr18Ni12Mo2Ti
Seat: 1Cr18Ni9Ti, Cr18Ni12Mo2Ti
Stem: 1Cr18Ni9Ti, Cr18Ni12Mo2Ti
Membrane cover: A3, A3 steel coated Teflon stainless steel
Fillers: nitrile, ethylene, fluorine, oil-resistant rubber
Specifications and technical parameters of self-operated pressure regulating valves
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Nominal diameter DN (mm) |
20 |
25 |
32 |
40 |
50 |
65 |
80 |
100 |
125 |
150 |
200 |
250 |
300 |
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Rated Flow Coefficient (KV) |
7 |
11 |
20 |
30 |
48 |
75 |
120 |
190 |
300 |
480 |
760 |
1100 |
1750 |
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Rated stroke (mm) |
8 |
10 |
14 |
20 |
25 |
40 |
50 |
60 |
70 |
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Nominal pressure PN (Mpa) |
1.6、4.0、6.4 |
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Pressure Regulation Range (MPa) |
15～50 40～80 60～100 80～140 120～180 160～220 200～260 |
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Flow Characteristics (°C) |
Hurry up |
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Adjustment Accuracy (%) |
±5 |
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Operating temperature (°C) |
≤350 |
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Allowable leakage |
Hard seal (L/H) |
Single seat: ≤ 10-4 valve rated capacity (Class IV); Double seat, sleeve: ≤5×10-3 valve rated capacity (Class II) |
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Soft seal (ml/h) |
0.15 |
0.30 |
0.45 |
0.60 |
0.90 |
1.7 |
4.0 |
6.75 |
11.10 |
16.0 |
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Stress reduction ratio |
It’s huge |
10 |
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So small |
1.25 |
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Self-operated pressure regulating valve dimensions and weight
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Nominally known as the diameter DN |
20 |
25 |
32 |
40 |
50 |
65 |
80 |
100 |
125 |
150 |
200 |
250 |
300 |
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Flange takes over size B |
383 |
512 |
603 |
862 |
1023 |
1380 |
1800 |
2000 |
2200 |
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Flange end face distance L |
150 |
160 |
180 |
200 |
230 |
290 |
310 |
350 |
400 |
480 |
600 |
730 |
850 |
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Pressure adjustment range kpa |
15-140 |
H |
475 |
520 |
540 |
710 |
780 |
840 |
880 |
915 |
940 |
1000 |
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A |
280 |
308 |
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280-500 |
H |
455 |
500 |
520 |
690 |
760 |
800 |
870 |
880 |
900 |
950 |
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A |
230 |
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120-300 |
H |
450 |
490 |
510 |
680 |
750 |
790 |
860 |
870 |
890 |
940 |
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A |
176 |
194 |
280 |
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480-1000 |
H |
445 |
480 |
670 |
740 |
780 |
850 |
860 |
880 |
930 |
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A |
176 |
194 |
280 |
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600-1500 |
H |
445 |
570 |
600 |
820 |
890 |
950 |
1000 |
1100 |
1200 |
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A |
85 |
96 |
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1000-2500 |
H |
445 |
570 |
600 |
820 |
890 |
950 |
1000 |
1100 |
1200 |
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A |
85 |
96 |
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Weight kg |
26 |
37 |
42 |
72 |
90 |
114 |
130 |
144 |
180 |
200 |
250 |
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Pressure pipe fitting threads |
M16×1.5 |
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Self-operated pressure regulating valve connection size and standard
Flange standard: Casting method according to BG9113-88, JB/79-94
Flange sealing surface type: PN16 convex surface
PN40 and 64 are concave and convex, and the valve body is concave
The length of the structure is BG12221-98
Actuator signal interface: female thread M16×1.5
※ The body flange and flange end face distance can be manufactured according to the standard specified by the user. Such as: ANSI, JIS, DIN, etc.
Self-operated pressure regulating valve ordering instructions
When ordering, please provide the following information:
The name and model of the regulating valve
Nominal pressure Mpa
Nominal Diameter (mm)
Rated flow factor (Kv)
Inherent flow characteristics
Media Name
Operating temperature and range
The mode of operation of the whole machine
pressure set point and adjustment range
Valve body, valve trim and packing material
Attached attachments
Other special requirements