COVNA Pneumatic Control Valve Series

What is Pneumatic Control Valve:
The pneumatic control valve is composed of an actuator and an adjustment mechanism. The actuator is the thrust component of the adjustment valve. It generates a corresponding thrust according to the pressure of the control signal to push the adjustment mechanism into action. The valve body is the regulating component of the pneumatic regulating valve. It directly contacts the regulating medium to regulate the flow, pressure, temperature and other process parameters of the fluid. The pneumatic control valve has the characteristics of simple control, fast response, and intrinsically safe, without additional explosion-proof measures. Pneumatic control valve is one of the industrial process control instruments widely used in petroleum, chemical, electric power, metallurgy and other industrial enterprises.

Advantages of COVNA Pneumatic Control Valve Series:

● It is cost-effective and safe to be used,which can help you save cost of the whole system COVNA Single Seat Pneumatic Globe Control Valved maintenance.
● It has a simple structure and a big torque, explosion-proof with short actuating times,optimized actuating forces and reliable tight sealing.
● It can perfectly avoid problems of friction, corrosion, and emissions.
● It is of low center of gravity, high vibration resistance and easy to install. 
● Simple to control, rapid response, and intrinsic safety, no need to take additional explosion-proof measures.
● Fluid channels in a s- shaped streamline, small pressure drop loss large flow, wide adjustment range, high precision flow .

Working Principle Of COVNA Pneumatic Control Valve:

By receiving the control signal pressure output by the standard electric signals of the regulator(via electricity-air positioner or electricity-air converter), the valve opening is changed, so as to change the flow of the medium to be regulated and then allow parameters such as flow, pressure, temperature and liquid level to be regulated. As a result, the production process automation is achieved.
After the extraneous pneumatic pressure signal is input into the diaphragm chamber, it will act on the diaphragm to produce thrust. The thrust them compress the spring pack, and move the push rod, which drives the spindle to open(close) of the valve clack until the balance is achieved between the thrust and reaction of the compressed spring pack and the clack is in a stable position of the stroke. It is concluded from the above principle. There is a definite proportional relation between the clack and the input pressure signal.

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Technical Parameter of Valve Body: 

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

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

Weight table of Pneumatic diaphragm regulating valve:

Company Profile:

Factory Profile:


Company Certificates:

●22 years manufacturer of actuated valves

●Mass customaztion acceptable. 3 production base, large stock,

●Short lead time, same day shipping.

●German imported manufacturing facilities, 100% Q.C passed before shipping, quality assured.

●Industrial standard 1 year (12 months) warranty.

●ISO 9001 certificated, with extra certifications include CE, TUV, RoHS, SGS, BV, explosion & fire safe.

●OEM / ODM  service available. Can do JIS 5K / 10K, ANSI 150lb / 300lb / 600lb / 900lb standard.

●More infomation, pls send message to us. Quote will be provided within 2 hours!