Pneumatic ppr plastic butterfly valve can not be opened or closed manually or electrically - Shanghai Dongfeng Pump Valve Factory - 上海花千坊_上海龙凤花坛_夜上海最新论坛

Pneumatic ppr plastic butterfly valve can not be opened or closed manually or electrically

The pneumatic ppr plastic butterfly valve cannot be opened or closed manually or electrically. Can the electric butterfly valve be closed manually?

5) The method of overcoming the rotating force generated by the fluid to make the valve core rotate. For the valve core with "V" port, the tangential force acting on the valve core with "V" port is inconsistent due to the asymmetry of the medium flow, resulting in a rotating force, especially for the valve with DN ≥ 100. As a result, the connection between the valve and the actuator stem may be disconnected, and the actuator without spring may cause the distortion of the diaphragm. The solutions are as follows: ① Turn the valve core in the opposite direction of rotation to balance the tangential force acting on the valve core; ② Further lock the connection between the valve rod and the push rod. If necessary, add an anti rotation splint; ③ Replace the "V" shaped opening valve core with a plunger type valve core; ④ adopt or change to a sleeve type structure; ⑤ If it is the rotation caused by resonance, eliminate the resonance to solve the problem.

Pneumatic ppr plastic butterfly valve 、

According to the action mode, it can be classified into switching type and regulating type. The switch type is to connect the power supply directly and complete the switch action through the positive and negative directions of the switch. The regulating type takes the power supply as the power source and receives the parameter value 4~20mA (weak current control such as 0~5) signal preset by the industrial automation control system to complete the regulating action. Advantages of pneumatic butterfly valve: 1. The pneumatic butterfly valve can be opened and closed easily and quickly, labor-saving, with small fluid resistance, and can be operated frequently. 2. The pneumatic butterfly valve has simple structure, small volume and light weight. 3. The pneumatic butterfly valve can transport mud, with the least liquid accumulated at the pipe mouth. 4. The pneumatic butterfly valve can achieve good sealing under low pressure. 5. The pneumatic butterfly valve has good regulation performance.

Pneumatic ppr plastic butterfly valve

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