Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

ZSPQ Pneumatic Piston-type Fast Shut-off Valve
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Mobile：+86 195 1816 9569
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Address：No. 1, Linxia Road, Oubei Street, Yongjia County, Wenzhou City, Zhejiang Province,china
Website：https://www.kaiweixi.com

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ZSPQ Pneumatic Piston-type Fast Shut-off Valve

Model：ZSPQ-16C/ZSPQ-25C/ZSPQ-40C/ZSPQ-64C/ZSPQ-16P/ZSPQ-25P/ZSPQ-40P/ZSPQ-64P
Specification：DN20-DN300
Temperature：-250~450℃
Medium：Liquid and gas media without impurities or particles

Pressure：PN16、PN25、PN40、PN64
Connection method：Flange
Driving method：Pneumatic
Material：Cast Steel,Stainless Steel

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ZSPQ Pneumatic Piston-type Fast Shut-off ValveOverview

ZSPQ pneumatic piston-type fast shut-off valve is an industrial safety control unit consisting of a high-thrust pneumatic piston actuator and a high-sealing straight-through single-seated valve body. It is specifically designed for emergency shut-off, opening, and automated sequence control of fluid media during production processes. The core power source is compressed air. By utilizing a matching solenoid valve to control the flow of air into the upper and lower chambers of the actuator, the piston is driven to move rapidly within the cylinder, thereby causing instantaneous linear movement of the stem and plug relative to the seat. Compared to traditional pneumatic diaphragm control valves, the ZSPQ model offers significant advantages such as faster response, larger opening/closing thrust, higher frequency of action, and excellent mechanical self-locking capabilities. It can achieve complete and tight pipe closure within seconds or even milliseconds. The sealing structure utilizes a strict single-seated design with precision-ground sealing surfaces to ensure bubble-tight zero leakage under various pressure gradients. ZSPQ valves feature a simple structure, reliable action, and strong vibration resistance, and are widely used in emergency protection systems for flammable, explosive, high-pressure gas or liquid media in the petroleum, chemical, metallurgical, and power industries, serving as critical execution equipment for the safe and stable operation of the entire process.

Product Image of ZSPQ Pneumatic Piston-type Fast Shut-off Valve

ZSPQ Pneumatic Piston-type Fast Shut-off ValveCharacteristic

1.Extremely fast response and instantaneous shut-off:Utilizing a piston actuator as the power source and the instantaneous energy release of compressed air in the cylinder to generate powerful force, its opening/closing speed is significantly superior to diaphragm valves. This millisecond-level response is vital for Emergency Shutdown Systems (ESD).
2.High output thrust and differential pressure resistance:The piston actuator cylinder has high pressure ratings and a large effective area, outputting extreme thrust. This ensures the plug is pressed tightly against the seat even under complex high-pressure differential conditions, solving the issue of incomplete closure caused by fluid impact.
3.Bubble-tight shut-off performance:The single-seated design features precision-ground sealing pairs. Depending on the conditions, soft seals or Stellite-overlaid hard seals can be selected. When closed, it forms an absolute fluid barrier with zero leakage, preventing loss of valuable or hazardous media.
4.Intrinsic safety and fail-safe function:The actuator features a built-in heavy-duty return spring, supporting fail-close or fail-open logic. In the event of air or power failure, the valve automatically resets to a preset safety position via mechanical spring force, preventing process loss of control.
5.Robust structure and high-frequency operation:Piston moving parts are uniformly stressed, and the inner cylinder wall is hardened and mirror-polished for superior wear resistance. The valve supports extremely high cycle frequencies without mechanical fatigue, meeting the needs of automated lines for frequent switching.
6.Compact design and installation flexibility:Compared to diaphragm actuators with equivalent thrust, piston actuators are much smaller and more compact, reducing installation height and footprint. The valve supports horizontal, vertical, or tilted installation, facilitating layout in narrow spaces.
7.Material systems for harsh environments:Body and internals are available in cast steel, stainless steel (304/316L), and various alloys. For abrasive or corrosive media, sealing surfaces can be thickened with hard-facing or chemical treatment to ensure long-term service.
8.Low maintenance cost and modular interchangeability:All components adopt standardized and modular designs. With few wearing parts and high universality, the scientific connection between the actuator and body allows for rapid assembly/disassembly without removing the pipe, reducing maintenance costs.

ZSPQ Pneumatic Piston-type Fast Shut-off Valvestructure principle

Structural Drawing of ZSPQ Pneumatic Piston-type Fast Shut-off Valve

List of Component Names and Materials

Part	Material
Valve body, valve cover	Cast Steel,Stainless Steel
Sealing packing	V-type PTFE (Polytetrafluoroethylene)
Compression spring	60Si2Mn
Worm	45
Valve stem, valve core	1Cr18Ni9
O-ring seal	Oil-resistant rubber
Gasket	1Cr18Ni9 clad asbestos board
Push rod	2Cr13

ZSPQ Pneumatic Piston-type Fast Shut-off Valvetechnology parameter

Performance Specification Sheet

Performance Specification Sheet
Nominal Pressure	1.6	2.5	4.0	6.4	MPa
Strength test pressure	2.4	3.8	6.0	9.6
Sealing test pressure	1.76	2.8	4.4	7.04
Applicable Temperature	-250-450				℃

ZSPQ Pneumatic Piston-type Fast Shut-off Valvestandard size

Standard requirements for external dimensions

1. The structural length of the valve shall comply with the standard of GB/T12221

2. Connecting flanges according to GB/T17241.6 standard

Outline Drawing of ZSPQ Pneumatic Piston-type Fast Shut-off Valve

Outline dimension table(Unit: mm)

Nominal Diameter (DN)			20	25	32	40	50	65	80	100	125	150	200	250	300
Face-to-face (L)			185	190	210	230	255	285	310	355	425	460	560	655	735
H1	Normal Temp		662	732	744	885	915	1131	1147	1155	1588	1608	1659	1850	2130
	Medium Temp		813	883	895	1036	1066	1296	1310	1318	1803	1823	1874
	High Temp		1018	1088	1100	1242	1272	1550	1558	1566	2028	2048	2094
	LowTemp	-100℃	1127	1181	1193	1310	1335	1554	1565	1569	1942	1952	1982
		-200℃	1327	1381	1393	1510	1535	1754	1765	1769	2142	2152	2182
		-250℃	1527	1581	1593	1710	1735	1954	1965	1769	2342	2352	2382
	Normal Temp		447			570		706			1022			1300
	Medium Temp		447			570		706			1022
	High Temp		447			570		649			872
	LowTemp	-100℃	500	500	500	500	500	600	600	600	700	700	700
		-200℃	700	700	700	700	700	800	800	800	900	900	900
		-250℃	900	900	900	900	900	1000	1000	1000	1100	1100	1100
H2			53	112	118	129	144	178	191	195	245	255	290	380	436
H3			222			280		378
Flange Standard			GB：1.6、2.5、4.0、6.4Mpa ANSI：150、300、600Lb JIS：10K、20K、30K

Articles related to technology research and development

Dynamic balance electric control valve Patent

The utility model provides a dynamically balanced electric regulating valve, which includes a valve body, a valve cover, a valve rod, a valve core installed inside the valve body and connected to the valve rod, and an actuator installed on the valve cover and connected to the top end of the valve rod. The valve body is internally provided with a water inlet chamber, a valve cavity, and a water outlet chamber in order towards the direction of medium flow. The valve core is in the shape of a bucket with its opening facing downwards. The valve core is located inside the valve cavity and is used for connecting or cutting off between the water inlet chamber and the valve cavity. The top of the valve core is provided with a through port for medium circulation. Above the through port, there is a filter cover detachably connected to the valve core. The valve rod is provided with a step, and the outside of the step is covered with an elastic sleeve that fits it. The top of the filter cover is provided with a fixing hole that fits the elastic sleeve. This utility model can filter the medium, is simple to install, time-saving, labor-saving, and can reduce the medium pressure inside the valve body, extending the service life of the valve core.
1. A dynamic balance electric regulating valve, comprising a valve body, a valve cover, a valve rod, a valve core installed inside the valve body and connected to the valve rod, and an actuator installed on the valve cover and connected to the top end of the valve rod. Its characteristic lies in that the valve body is sequentially provided with an inlet chamber, a valve cavity, and an outlet chamber in the direction of medium flow. The valve core is in the shape of a bucket with an opening facing downwards. The valve core is located inside the valve cavity and is used for connecting or cutting off between the inlet chamber and the valve cavity. The top of the valve core is provided with a port for medium circulation. Above the port, there is a filter cover detachably connected to the valve core. The valve rod is provided with a step, and the outside of the step is covered with an elastic sleeve that fits it. The top of the filter cover is provided with a fixing hole that fits the elastic sleeve.
2. A dynamic balance electric regulating valve according to claim 1, characterized in that the bottom of the valve body is provided with a downward-opening groove, which is connected to the valve cavity through a through hole. A bottom cover connected to the valve body is arranged below the groove, and a pressure relief mechanism is arranged inside the groove. The pressure relief mechanism comprises a force-receiving member, a pressure plate connected to the force-receiving member, and a first spring arranged below the pressure plate and abutting against the bottom cover. The force-receiving member comprises a flow diversion block protruding from the through hole and a connecting rod connected to the flow diversion block, and the connecting rod passes through the pressure plate and is locked and fixed by a nut.
3. A dynamic balance electric regulating valve according to claim 2, characterized in that the top end of the pressure plate is pressed against the top wall of the groove, the bottom of the pressure plate is provided with a boss, and the top end of the first spring is sleeved on the boss.
4. A dynamic balance electric control valve according to claim 1, characterized in that the valve rod is arranged through the valve cover, a sealing cover threadedly connected to the valve cover is sleeved on the valve rod, a convex ring abutting against the valve cover is arranged on the outer circumferential wall of the sealing cover, a nut cover threadedly connected to the sealing cover is arranged at the connection between the sealing cover and the valve rod, an installation groove is arranged at the connection between the nut cover and the valve rod, a plurality of O-rings adapted to the valve rod are stacked in the installation groove, and a packing gland threadedly connected to the installation groove is arranged above the O-rings.
5. A dynamic balance electric control valve according to claim 4, characterized in that a second spring is arranged between the packing gland and the O-ring.
6. A dynamic balance electric control valve according to claim 5, characterized in that a sealing ring adapted to the valve rod is arranged inside the nut cover below the installation groove.
7. A dynamic balance electric control valve according to claim 6, characterized in that the bottom of the sealing cover is provided with a thrust ring that is threadedly connected to the sealing cover and abuts against the bottom end of the valve cover.
8. A dynamic balance electric regulating valve according to claim 1, characterized in that the top surface of the elastic sleeve is higher than the top surface of the filter cover.
9. A dynamic balance electric control valve according to claim 8, characterized in that the filter cover is connected to the valve core through threads.

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Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

ZSPQ Pneumatic Piston-type Fast Shut-off Valve

More Pneumatic Control Valve>>

More control valve>>

More valve>>

ZSPQ Pneumatic Piston-type Fast Shut-off Valve