ZSH Shanghai Valve Manufzcturing Co.,LTD.

Home > Products > Regulator valve > Pneumatic piston cut-off valveZSPQ

Description Material Performance Product Size Specifications

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
category	Normal temperature type	Middle temperature type	High temperature type	Low temperature type
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
Rated flow coefficient Kv	6.5	10	15	25	40	65	100	150	260	350	540
Nominal pressure MPa	4.0(JB/T79·2-94)
Trip mm	16			25		40			60
Medium temperature ℃	-16～150(Normal atmospheric temperature)；-60～450(Medium temperature)；-60～550（high temperature）；-250～60（low temperature）；
Flow characteristics	Two bit fast open
Distribution execution mechanism	ZSD-D			ZSD-3		ZSD-5			ZSD-7
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)
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.
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
	Hard seal	1	3				5			7		9
Cut off time S		1～2					2～4
Rated Travel Deviation%		+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
	Gas off	4.0					2.5	1.7	1.0	1.1	0.8	0.6

body material	Nominal pressure4.0MPaWorking temperature of medium℃
	200	250	300	350	＜400	＜425	＜450	＜475	＜500	＜510	＜525	＜550
	Maximum working pressure MPa
ZG270-500 ZG1Cr18Ni9Ti	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

nominal Path	L	H2	With hand wheel				Without hand wheel
nominal Path	L	H2	H	H1	H3	Weight kg	H	H1	Weight kg
20	180	53	662	447	222	39	574	359	26
25	190	111	732			46	644		33
32	210	117	744			48	656		35
40	230	131	885	570	280	85	778	463	61
50	255	146	915	570	280	89	808	463	65
65	285	181	1131	706	389	135	969	542	97
80	310	190	1147			143	983		99
100	355	194	1155			163	991		109
125	425	256	1588	1022		305	1305	739	218
150	460	266	1608			331	1325		244
200	560	289	1659			445	1376		358

Middle temperature type pneumatic piston cut off valve

nominal Path	L	H2	With hand wheel				Without hand wheel
nominal Path	L	H2	H	H1	H3	Weight kg	H	H1	Weight kg
20	180	53	813	447	222	43	725	359	30
25	190	111	883			52	795		39
32	210	117	895			54	807		41
40	230	131	1036	570	280	90	929	463	66
50	255	146	1066	570	280	95	969	463	71
65	285	181	1296	706	389	145	1132	542	101
80	310	190	1310			155	1146		111
100	355	194	1318			172	1154		128
125	425	256	1803	1022		327	1520	739	240
150	460	266	1823			356 .	1540		269
200	560	289	1874			464	1591		377

Low temperature type pneumatic piston cut off valve

Nominal diameter	L	H2	H3	-100℃				-200℃				-250℃
				With hand wheel		Without hand wheel		With hand wheel		Without hand wheel		With hand wheel		Without hand wheel
				H1	H	H1	H	H1	H	H1	H	H1	H	H1	H
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