Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

ZJHM Compact Pneumatic Diaphragm Cage-Guided 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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ZJHM Compact Pneumatic Diaphragm Cage-Guided Control Valve

Model：ZJHM-16C/ZJHM-25C/ZJHM-40C/ZJHM-64C/ZJHM-16P/ZJHM-25P/ZJHM-40P/ZJHM-64P/ZJHM-16R/ZJHM-25R/ZJHM-40R/ZJHM-64R
Specification：DN20-DN300
Temperature：-200~560℃
Medium：Common fluids, etc.

Pressure：PN16,PN25,PN40,PN64
Connection method：flange
Driving method：Pneumatic
Material： Cast Steel,Stainless Steel,Duplex Stainless Steel

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ZJHM Compact Pneumatic Diaphragm Cage-Guided Control ValveOverview

ZJHM compact pneumatic diaphragm cage-guided control valve is an industrial automation control unit consisting of a high-performance multi-spring pneumatic diaphragm actuator and a compact pressure-balanced cage-style valve body. The valve receives standard analog signals such as 4-20mA DC from control systems (such as PLC, DCS). Through an electro-pneumatic valve positioner, it converts the control signals into pneumatic power, driving the multi-spring actuator to generate linear thrust, which moves the balanced valve plug within the cage vertically. Due to the pressure balance hole design of the valve plug, the fluid-induced unbalanced forces acting on the plug are effectively offset. This series of valves features excellent dynamic stability, high allowable pressure differential, low operating noise, and a compact, lightweight design. It is widely used in industries such as petroleum, chemical, pharmaceutical, metallurgical, and power for automation control systems that demand high pressure drops, large flow rates, and high dynamic response.

Product Image of ZJHM Compact Pneumatic Diaphragm Cage-Guided Control Valve

ZJHM Compact Pneumatic Diaphragm Cage-Guided Control ValveCharacteristic

1.Pressure-balanced valve plug structure:The valve plug is equipped with precision pressure balance holes, utilizing the medium's own pressure to offset the unbalanced force before and after the valve. This significantly reduces the driving force required by the actuator, allowing stable control of high-pressure differential fluids with a smaller actuator size.
2.Excellent dynamic stability:Utilizing cage side-guiding technology, the guiding surface is precise and uniformly stressed. This structure effectively suppresses vibration and high-frequency whistling generated by high-speed fluids passing through the throttling windows, maintaining stable regulation even under large pressure fluctuations.
3.Compact and lightweight design:Adopting integrated structural optimization and a multi-spring pneumatic actuator, the overall height and weight are significantly reduced (by approximately 30%) compared with traditional pneumatic control valves. This saves installation space and significantly reduces the mechanical load on the pipeline.
4.Superior noise and cavitation resistance:The throttling design of the cage window complies with fluid dynamics principles, effectively guiding the flow and dissipating kinetic energy in stages. Compared with single-seated valves, it offers better noise reduction and stronger cavitation resistance, extending the service life of internal components.
5.High-precision pneumatic drive:Equipped with a multi-spring pneumatic diaphragm actuator, providing large output thrust and excellent linearity. Combined with an intelligent valve positioner, it achieves minimal dead zones and high-precision repeatable positioning, ensuring stable and accurate process parameters.
6.Intrinsically safe and explosion-proof:Driven by an air source, the adjustment process involves no risk of electrical sparks, providing inherent safety attributes. It supports a choice of "air-to-open" or "air-to-close" types, automatically resetting to a safety position in the event of a power air source failure.
7.Wide material adaptability:Valve bodies are available in cast steel (WCB), stainless steel (CF8/CF8M), and high-temperature alloys. Cages and plugs can undergo surface hardening or Stellite overlay based on working conditions to handle steam, oil, and general corrosive media effectively.
8.Modular online rapid maintenance:Utilizing a top-pressed bonnet structure. Maintenance can be performed without removing the valve body from the pipeline by simply extracting the actuator and valve cover to achieve modular replacement of the cage, plug, and seals, significantly shortening maintenance downtime.

ZJHM Compact Pneumatic Diaphragm Cage-Guided Control Valvestructure principle

Structural Drawing of ZJHM Compact Pneumatic Diaphragm Cage-Guided Control Valve

List of Component Names and Materials

Name	Material
Valve body	HT200, ZG230-450, ZG1Cr18Ni9Ti
Bonnet	HT200, ZG230-450, ZG1Cr18Ni9Ti
Valve core	1Cr18Ni9Ti, Stellite alloy surfacing
Valve seat	1Cr18Ni9Ti, Stellite alloy surfacing
Soft sealed valve core	Reinforced PTFE
Packing	PTFE, flexible graphite, stainless steel bellows
Gasket	Rubber asbestos board, 1Cr18Ni9Ti, graphite spiral wound gasket
Diaphragm cover	A3
Bellows diaphragm	Nitrile rubber (clipped) reinforced polyester fabric
Spring	60Si2Mn
Valve stem/push rod	2Cr13, 1Cr18Ni9Ti
Bush	2Cr13

ZJHM Compact Pneumatic Diaphragm Cage-Guided 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	-200-560				℃

ZJHM Compact Pneumatic Diaphragm Cage-Guided 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 ZJHM Compact Pneumatic Diaphragm Cage-Guided Control Valve

Outline dimension table(Unit: mm)

Nominal Diameter(DN)			20	25	32	40	50	65	80	100	125	150	200	250	300
L	PN16		185	200	205	222	250	276	298	350	410	451	600	670	735
	PN40		190	205	210	230	255	285	310	355	425	460	615	685	750
	PN64		200	210	220	251	286	311	337	394	440	475	630	700	765
H1	Room temperature	PN16	487	493	524	524	538	686	706	726	969	969	1009	1353	1390
		PN40	487	493	524	524	538	686	706	733	979	979	1029	1373	1415
		PN64	497	503	534	534	546	696	713	743	999	999	1044	1385	1425
	Medium Temperature		+200					+250			+320			+350
H2	PN16		53	58	68	73	80	90	98	108	123	140	168	203	230
	PN40		53	58	68	73	80	90	98	115	135	150	188	223	255
	PN64		63	68	75	83	88	100	105	125	148	170	203	235	265
A			282					360			470			620
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

ZJHM Compact Pneumatic Diaphragm Cage-Guided Control Valve

More Pneumatic Control Valve>>

More control valve>>

More valve>>

ZJHM Compact Pneumatic Diaphragm Cage-Guided Control Valve