Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

ZJHQ Pneumatic Diaphragm Three-way Converging Control Valve
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Phone：+86（577）6730 7899
Mobile：+86 195 1816 9569
Fax：+86（577）6738 7099
Email：Lucas@kaiweixi.com
Address：No. 1, Linxia Road, Oubei Street, Yongjia County, Wenzhou City, Zhejiang Province,china
Website：https://www.kaiweixi.com

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ZJHQ Pneumatic Diaphragm Three-way Converging Control Valve

Model：ZJHQ-16C/ZJHQ-25C/ZJHQ-40C/ZJHQ-64C/ZJHQ-16P/ZJHQ-25P/ZJHQ-40P/ZJHQ-64P/ZJHQ-16R/ZJHQ-25R/ZJHQ-40R/ZJHQ-64R
Specification：DN25-DN300
Temperature：-60~450℃
Medium：Common fluids, etc.

Pressure：PN1.6、PN2.5、PN4.0、PN6.4
Connection method：Flange
Driving method：Pneumatic
Material：Cast Steel,Stainless Steel,Duplex Stainless Steel

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ZJHQ Pneumatic Diaphragm Three-way Converging Control ValveOverview

ZJHQ pneumatic diaphragm three-way converging control valve is an industrial automation control valve consisting of a multi-spring pneumatic diaphragm actuator and a three-way converging globe-style valve body. By receiving pneumatic signals from the control system (or standard 4-20mA DC signals converted via an electro-pneumatic positioner), the valve utilizes the thrust generated in the diaphragm chamber to drive the valve stem, moving the valve plug axially between two seats. Its unique two-inlet and one-outlet structural design is specifically used to mix two fluids of different temperatures, pressures, or concentrations into a single uniform fluid in a set proportion, achieving precise control over parameters such as the temperature and composition of the mixed medium. Compared to electric control valves, the ZJHQ model features sensitive action, rapid response, and intrinsic safety due to its pneumatic actuator, making it better suited for high-frequency regulation and environments with extreme safety requirements. In heat exchange stations, industrial mixing systems, and cooling circulation loops, a single pneumatic three-way converging valve can replace two coordinated single-seated control valves. This not only significantly simplifies the process pipeline configuration and reduces potential leakage points but also greatly lowers system complexity and equipment investment costs.

Product Image of ZJHQ Pneumatic Diaphragm Three-way Converging Control Valve

ZJHQ Pneumatic Diaphragm Three-way Converging Control ValveCharacteristic

1.Proportional mixing adjustment logic:The valve body features two inlets (Ports A and B) and one outlet (Port C). As the valve plug position changes, the opening of one inlet increases while the other decreases simultaneously, ensuring a relatively stable total flow and achieving precise fluid proportioning adjustment.
2.Compact pipeline design:The integrated three-way flow path design effectively reduces the number of pipeline interfaces, elbows, and supports. The small footprint is particularly suitable for modular heat exchange units or skid-mounted equipment with limited space.
3.Efficient pneumatic diaphragm drive:Equipped with a multi-spring pneumatic diaphragm actuator, the structure is lightweight yet provides large output force. Compared to electric drives, the pneumatic actuator is more sensitive with a faster response speed, allowing for real-time regulation following control signal changes.
4.Dynamic operational stability:The valve plug adopts a side-guiding structure, and the flow path is optimized via fluid dynamics. Under mixing conditions, it can effectively suppress impact vibration and turbulent noise generated by the intersection of two fluid streams, ensuring stable system operation under complex differential pressures.
5.Excellent adjustment characteristics:The valve plug profile is precision-machined to provide linear or equal percentage flow characteristics. The wide rangeability (typically up to 30:1 or higher) ensures high-precision control even under low load fluctuations.
6.Intrinsic safety and fail-safe function:Pneumatic systems possess natural explosion-proof advantages, requiring no additional explosion-proof enclosures for use in hazardous areas. It supports fail-safe modes: upon air supply failure, the valve automatically resets to a preset safety position (full open or full close) via built-in spring pressure, ensuring process safety.
7.Material and environmental adaptability:Valve body materials include grey cast iron (HT200), cast steel (ZG230-450), and stainless steel (ZG1Cr18Ni9Ti/CF8). Internal parts can be hardened to handle hot water, thermal oil, steam, and general corrosive media.
8.Significant maintenance cost advantages:The modular internal component design allows for the inspection and replacement of seals or valve plugs without dismantling the entire valve body or complex electrical disassembly, greatly shortening maintenance downtime and resulting in low long-term operation and maintenance expenses.

ZJHQ Pneumatic Diaphragm Three-way Converging Control Valvestructure principle

Structural Drawing of ZJHQ Pneumatic Diaphragm Three-way Converging Control Valve

List of Component Names and Materials

Part Name	Material Description
Valve body, valve bonnet	Cast iron, carbon steel, stainless steel
Valve core, valve seat	1Cr18Ni9Ti, Stellite alloy surfacing
Valve stem, push rod	2Cr13, 1Cr18Ni9Ti
Bellows diaphragm	Nitrile rubber clamped reinforced polyester fabric
Spring	60Si2Mn
Packing	PTFE, flexible graphite
Diaphragm cover	A3
Bushing	2Cr13
Gasket	Rubber asbestos board, 1Cr18Ni9Ti, graphite spiral wound gasket

ZJHQ Pneumatic Diaphragm Three-way Converging Control 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	-60-450				℃

ZJHQ Pneumatic Diaphragm Three-way Converging Control 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 ZJHQ Pneumatic Diaphragm Three-way Converging Control Valve

Outline dimension table(Unit: mm)

Nominal Diameter(DN)				25	32	40	50	65	80	100	125	150	200	250	300
Flange Distance(L)		PN16		185	200	220	250	275	300	350	410	450	550	670	770
		PN40		190	200	220	255	285	310	360	430	465	560	690	795
		PN64		200	210	235	265	295	320	370	440	475	570	752	819
Medium Temp Type Bonnet H1				622	637	660	695	829	854	856	1089	1114	1170	1530	1600
Medium Temp Type Bonnet H1				725	750	763	795	983	1008	1010	1270	1295	1351	1728	1798
H2	PN16			140	150	160	180	200	222	220	270	280	306	474	584
	PN40			140	150	160	180	200	222	220	270	280	306	474	584
	PN64		diversion	160	170	180	200	220	242	260	300	322	376	474	584
	PN64		confluence	160	170	180	200	220	242	260	325	322	376	495	604
A				282				360			470			620
Flange Standard				GB：1.6、2.5、4.0、6.4Npa ANSI；150、300、600Lb JIS：10K、20K、30K

Note:(1)H1 in this table is based on PN16.(2)The height for models equipped with a handwheel mechanism should be increased by:150mm(DN20-50), 180mm(DN65-100), 250mm(DN125-200), 280mm(DN250-300).

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

ZJHQ Pneumatic Diaphragm Three-way Converging Control Valve

More Pneumatic Control Valve>>

More control valve>>

More valve>>

ZJHQ Pneumatic Diaphragm Three-way Converging Control Valve