ZJH Series Pneumatic Diaphragm Control Ball Valve

Short Description:

Pneumatic diaphragm control valve

comprises a multiple spring zero adjustable actuator, a low flow resistance sleeve and a single seat regulation valve without a lower cover. The flow capacity increases by 1/3. It’s of low center of gravity, high vibration resistance and easy to install. The performance indexes are superior to products of the same kind. The products are widely used in automatic production control systems in industries including chemistry, petroleum, light industry, power station, and metallurgy. We will try our best to provide the high-quality and high-tech pneumatic control valve for your various project for flow control. Inquiry us to get the free valve solution!

Model

Inherent Regulation Ratio: 50:1
Nominal Pressure : 1.6 / 4.0 / 6.4 MPa
Service Temperature: -10 to 180℃
Ambient Temperature:-30 to 70℃
Air Supply Pressure : 0.14 / 0.25 / 0.40 KPa
Spring Range: 20 to 100(Basic type) / 40 to 200 / 80 to 240 KPa

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Benefits Of Pneumatic Control Valve:

COVNA Pneumatic Control Valves are suitable for regulating flow rate of pipelines. Pneumatic control valve is powered by compressed air, without electricity, safe and explosion-proof. The positioner receives and feedback the control signal of the industrial automation control system to complete the adjustment of the flow and pressure of the pipeline medium. Widely used in shipbuilding, power plants, food and beverage, and so on.

Features Of ZJH Series Pneumatic Diaphragm Control Valve:

● Globe valve is driven by pneumatic control which could allow your automation more easily and help you control the medium more precise

● Available in single-seat type and sleeve type for your choice

● Precise control: Pneumatic control valves offer precise and accurate control over the flow of fluids and gases

Technical Parameters Of Pneumatic Control Valve:

Nominal Size DN (mm)		20				25	32	40	50	65	80	100	125	150	200	250	300
		10	12	15	20
Rated Flow Coefficient CV	High accuracy flow characteristic clack	1.6	2.5	4.0	6.3	10	17	24	44	68	99	175	275	360	630	900	1440
	High capacity flow characteristic clack	1.8	2.8	4.4	6.9	11	21	30	50	85	125	200	310	440	690	1000	1600
Rated Stroke(mm)		10				16		25		40			60			100
Effective Diaphragm Area cm²		280						400		630			1000			1600
Inherent Regulation Ratio		50:1
Nominal Pressure MPa		1.6 / 4.0 / 6.4
Service Temperature		-100~-60℃; -200~-100℃; -250~-200℃
Ambient Temperature		-30~70℃
Air Supply Pressure KPa		0.14 / 0.25 / 0.40
Spring Range KPa		20~100(Basic type) / 40~200 / 80~240
Connection Thread		G1/4" , M16X1.5

Major Technological Performance Indexes And Testing:

1. Major performance indexes shall be as shown in below table

2. Testing shall be conducted according to the specification of GB/T4213-92

Serial No.	Technical Performance	Without Positioner	With Positioner
1	Basic Error	≤±5%	≤±1%
2	Return Difference	≤3%	≤1%
3	Dead Zone	≤3%	≤0.4%
4	Leakage	ZJHP Type:≤1X10-4Rated FlowZJHM Type:≤1X10-3 Rated Flow
5	Rated Flow Coefficient	≤±10%
6	Inherent Flow Characteristic	Slope±30%