PQ pneumatic piston valve is composed of a cutting mechanism and a pneumatic piston actuator. The cutting mechanism with DN20 core is formed through single seat, single oriented, DN25 ~ 200 spool for double direction, has the advantages of simple structure, convenient operation, reliable use, fast switching etc.. Mainly used in without impurities and particles of liquid and gas medium, fast close, fast emptying in automatic control system.
category |
Soft seal |
Hard seal |
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Normal temperature type |
Middle temperature type |
High temperature type |
Low temperature type |
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Model |
ZSPQ-40 |
ZSPQ-40G |
ZSPQ-40G |
ZSPQ-40D |
Specifications |
DN20~200 |
Note: parameters are for reference only, or are not full. Valve can be used in accordance with the requirements of different pressure, material, diameter, drive, etc.. Specific please contact or online advisory contact.
Part name |
Material Science |
Valve body, valve cover |
ZG270-500、ZG1Cr18Ni9Ti |
Valve stem, valve core |
1Cr18Ni9 |
Sealing packing |
V Type PTFE |
A seal |
1Cr18Ni9Asbestos board |
worm |
45 |
O type sealing ring |
Oil resistant rubber |
Compression spring |
60Si2Mn |
Bracket |
HT270 |
Worm gear box, worm wheel, cylinder, bearing cover, piston |
HT200 |
Push rod |
2Cr13 |
Nominal diameter mm |
20 |
25 |
32 |
40 |
50 |
65 |
80 |
100 |
125 |
150 |
200 |
250 |
300 |
350 |
400 |
Valve seat diameter mm |
26 |
43 |
43 |
52 |
62 |
79 |
94 |
115 |
145 |
166 |
216 |
Can be with the company Arrange production |
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Rated flow coefficient Kv |
6.5 |
10 |
15 |
25 |
40 |
65 |
100 |
150 |
260 |
350 |
540 |
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Nominal pressure MPa |
4.0(JB/T79·2-94) |
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Trip mm |
16 |
25 |
40 |
60 |
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Medium temperature ℃ |
-16~150(Normal atmospheric temperature);-60~450(Medium temperature);-60~550(high temperature);-250~60(low temperature); |
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Flow characteristics |
Two bit fast open |
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Distribution execution mechanism |
ZSD-D |
ZSD-3 |
ZSD-5 |
ZSD-7 |
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Flange size and type |
Press JB/T79·2-94The concave type (normal, middle and high temperature); according to the JB/T79 3-94 slot type (low temperature) |
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body material |
ZG270-500;ZG1Cr18Ni9Ti;ZG0Cr18Ni12Mo2Ti |
Main technical parameters of piston actuator
Model |
ZSD-D |
ZSD-3 |
ZSD-5 |
ZSD-7 |
Piston diameter mm |
150 |
200 |
300 |
400 |
effective areacm2 |
175 |
305 |
700 |
1245 |
Trip mm |
16 |
25 |
40 |
60 |
Inlet thread |
M16×1.5 |
M20×1.5 |
M24×2 |
|
Maximum output force N |
7200 |
12800 |
29300 |
5200 |
Accessories can be equipped with |
Air filter regulator, Paul position valve, limit switch, valve position transmitter, electromagnetic valve, hand wheel mechanism etc. |
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Operating gas pressure KPa |
500 |
Performance index of pneumatic cut-off valve
Nominal diameter mm |
20 |
25 |
32 |
40 |
50 |
65 |
80 |
100 |
125 |
150 |
200 |
|
Leakage rate drop/min |
Soft seal |
0 |
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Hard seal |
1 |
3 |
5 |
7 |
9 |
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Cut off time S |
1~2 |
2~4 |
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|
+10 |
Note: leakage test medium for water
Allowable differential pressure MPa
Nominal diameter mm |
20 |
25 |
32 |
40 |
50 |
65 |
80 |
100 |
125 |
150 |
200 |
|
Allowable differential pressure |
Open air |
4.0 |
4.0 |
4.0 |
2.8 |
3.5 |
2.4 |
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Gas off |
4.0 |
2.5 |
1.7 |
1.0 |
1.1 |
0.8 |
0.6 |
body material |
Nominal pressure4.0MPaWorking temperature of medium℃ |
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200 |
250 |
300 |
350 |
<400 |
<425 |
<450 |
<475 |
<500 |
<510 |
<525 |
<550 |
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Maximum working pressure MPa |
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ZG270-500 |
4.0 |
3.7 |
3.3 |
3.0 |
2.8 |
2.3 |
1.8 |
|
|
|
|
|
|
|
|
|
4.0 |
3.6 |
3.4 |
3.2 |
2.8 |
2.2 |
2.0 |
1.7 |
1.4 |
Normal temperature type pneumatic piston cut off valve
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Middle temperature type pneumatic piston cut off valve
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Low temperature type pneumatic piston cut off valve
Nominal diameter |
L |
H2 |
H3 |
-100℃ |
-200℃ |
-250℃ |
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With hand wheel |
Without hand wheel |
With hand wheel |
Without hand wheel |
With hand wheel |
Without hand wheel |
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H1 |
H |
H1 |
H |
H1 |
H |
H1 |
H |
H1 |
H |
H1 |
H |
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20 |
180 |
53 |
222 |
500 |
1127 |
500 |
1039 |
700 |
1237 |
700 |
1239 |
900 |
1527 |
900 |
1439 |
25 |
190 |
111 |
|
500 |
1181 |
500 |
1093 |
700 |
1381 |
700 |
1293 |
900 |
1581 |
900 |
1491 |
32 |
210 |
117 |
|
500 |
1193 |
500 |
1105 |
700 |
1393 |
700 |
1305 |
900 |
1593 |
900 |
1505 |
40 |
230 |
131 |
280 |
500 |
1310 |
500 |
1203 |
700 |
1510 |
700 |
1403 |
900 |
1710 |
900 |
1603 |
50 |
255 |
146 |
|
500 |
1335 |
500 |
1228 |
700 |
1535 |
700 |
1428 |
900 |
1735 |
900 |
1628 |
65 |
285 |
181 |
|
600 |
1554 |
600 |
1447 |
800 |
1754 |
800 |
1647 |
1000 |
1954 |
1000 |
1847 |
80 |
310 |
190 |
|
600 |
1565 |
600 |
1458 |
800 |
1765 |
800 |
1658 |
1000 |
1965 |
1000 |
1858 |
100 |
355 |
194 |
|
600 |
1569 |
600 |
1462 |
800 |
1769 |
800 |
1662 |
1000 |
1769 |
1000 |
1862 |
125 |
425 |
256 |
378 |
700 |
1942 |
700 |
1809 |
900 |
2142 |
900 |
2009 |
1100 |
2342 |
1100 |
2209 |
150 |
460 |
266 |
|
700 |
1952 |
700 |
1819 |
900 |
2152 |
900 |
2019 |
1100 |
2352 |
1100 |
2219 |
200 |
560 |
289 |
|
700 |
1982 |
700 |
1849 |
900 |
2182 |
900 |
2049 |
1100 |
2382 |
1100 |
2249 |