ZZY typeSelf operated pressure regulating valveWithout the need for external energy, using the energy of the regulated medium itself as a power source, introducing an actuator to control the position of the valve core, changing the pressure difference and flow rate at both ends, and stabilizing the pressure before (or after) the valve. It has the advantages of sensitive action, good sealing, and small pressure set point fluctuations, and is widely used in automatic control of pressure reduction and stabilization or release and stabilization of gas, liquid, and steam media. This series of regulating valves has the function of reducing pressure and regulating pressure after the valve is used(BType) and pressure relief valve front pressure regulation(KType). Pressure segmented regulation from15~250KPaCan be combined as needed to meet user operating requirements.
1、 Overview of ZZY type self operated pressure regulating valve
This seriesDifferential pressure control valveIt does not require external energy, uses the energy of the regulated medium itself as a power source, introduces an actuator to control the position of the valve core, changes the pressure difference and flow rate at both ends, and stabilizes the pressure before (or after) the valve. It has the advantages of sensitive action, good sealing, and small pressure set point fluctuations, and is widely used in automatic control of pressure reduction and stabilization or release and stabilization of gas, liquid, and steam media.
The ZZY type self operated pressure regulating valve has three structures: single seat (ZZYP), sleeve (ZZYM), and double seat (ZZYN). The execution structure has two types: diaphragm type and piston type. The action types include pressure regulation after the pressure reducing valve (B type) and pressure regulation before the pressure releasing valve (K type). The nominal pressure rating of the product includes PN16, 40, and 64; Valve body diameter range DN20~300; There are three levels of leakage levels: Level II, Level IV, and Level VI; The traffic characteristic is fast opening; The pressure is adjusted in stages from 15 to 250MPa. Can be combined as needed to meet user operating requirements.
2、 ZZY type self operated pressure regulating valve body
Valve body form: |
Direct casting valve |
Nominal diameter: |
DN25、32 、40 、50 、65 、80 、100 、200 、250、300 |
Nominal pressure: |
PN 1.6、2.5、4.0、6.4、10Mpa |
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ANSI 150、300、600Lb |
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JIS 10K、20K、30K |
Connection method: |
flangeFF、RF、RTJWait, wait |
Welding: |
SW、BW |
Flange distance: |
conform toIEC 534 |
Valve cover form: |
Standard type, extended type (heat dissipation, low temperature, bellows sealing) |
Packing: |
VPTFE, flexible graphite packing, etc |
a seal: |
Metal clip graphite sealing gasket |
Executing Agency: |
Self standing spring actuator |
3、 ZZY type self operated pressure regulating valve internal components
Valve core type: |
Single seat, socket, double seat |
Traffic characteristics: |
Equal percentage, linear |
Internal material: |
Please refer to the appendix for the standard material combination, usage temperature, and pressure range |
4、 ZZY type self operated pressure regulating valve offers various options
valve body |
type |
straight through |
valve cover |
type |
Standard and extended type |
material |
WCB、WC9、CF8、CF8Mclass |
material |
WCB、WC9、CF8、CF8M |
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valve core |
characteristic |
Straight line, equal percentage, quick opening |
filler |
“V”typePTFEFlexible graphite, corrugated pipe |
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material |
304304+STL/PTFE316316+STL/PTFE |
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actuator |
Self standing spring actuator |
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positioner |
- |
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attachment |
Pressure conduit and joint |
5、 Performance parameters of ZZY type self operated pressure regulating valve
Nominal diameter(DN) |
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 travel(mm) |
8 |
10 |
14 |
20 |
25 |
40 |
50 |
60 |
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Nominal pressure(MPa) |
1.6 4.0 6.4 |
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Pressure regulation range(Mpa) |
15~50 40~80 60~140 120~220 160~220 200~260 |
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Traffic characteristics |
Quick open |
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adjusting accuracy% |
±5 |
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Usage temperature(℃) |
≤350 |
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1Allowable leakage amount |
Hard seal(1/h) |
Single seat:≤10-4Rated capacity of valve(IV)Grade; Double seat, sleeve:≤5×10-4Rated capacity of valve(IIGrade) |
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Soft seal(1/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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2Pressure reduction ratio |
big |
10 |
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small |
1.25 |
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6、 The significance of ZZY type self operated pressure regulating valve model
7、 ZZY Self operated Differential Pressure Control Valve Dimensions and Weight

Flange connection size(B) |
383 |
512 |
603 |
862 |
1023 |
1380 |
1800 |
2000 |
2200 |
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Distance between flange end faces(L) |
150 |
160 |
180 |
200 |
230 |
290 |
310 |
350 |
400 |
480 |
600 |
730 |
850 |
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Pressure regulation 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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200-500 |
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 |
980 |
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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Thread of pressure pipe joint |
M1.6×1.5 |
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8、 ZZY type self operated pressure regulating valve ordering instructions
1. Name and model of ZZY type self operated pressure regulating valve.
2. ZZY type self operated pressure regulating valve nominal diameter (mm) and nominal pressure (MPa).
3. ZZZY type self operated pressure regulating valve rated flow coefficient (Kv).
4. ZZY type self operated pressure regulating valve medium name.
5. The working temperature and range of ZZY type self operated pressure regulating valve.
6. ZZY type self operated pressure regulating valve body, valve internals, and packing material.
9. Accessories for ZZY type self operated pressure regulating valve