a, choose electric actuator which three key elements should be considered?

( 1) Electric actuator output than the load of the valve, and effective matching. （ 2) Inspection specification, want to consider the allowable differential pressure valve required is considered processing rules. Large pressure difference to measure the valve core is not force each other. （ 3) Take into account the response time of the electric actuator is considered processing practical operation rules, especially the dynamic electric actuators.

2, compared with the pneumatic electric actuator motor electric actuators have what features, what are the output way?

electrodynamic drive source for power engineering simplicity, torque, torque is big, bending rigidity. But structure complicated, credibility is poor. In small and medium-sized more expensive than the pneumatic specifications. Common in pneumatic valve or without strict explosion proof and flame retardant. Dynamic electric actuator angular scheduling, scheduling, and rotate the three output modes.

three, why Angle class schedule valve pressure difference is very big disconnect?

disconnection of Angle class schedule valve pressure difference is very big, is caused by material on heart valve or valve plate together on the drive shaft torque is very small, so it can bear large pressure difference.

disc valve, the valve is the Angle of the common scheduling class valves.

4, what need to be conducted into the selected? How to choose?

single sealing classes such as single-seat regulating valve valve, high pressure valve, single without balance hole sealing sleeve valve should be carried out into the selection. Flow on, flow off each have advantages and disadvantages. Flow type valve work relatively stable, but since the wash and weaker in sealing performance, cycle is short; Long life flow closed type of valve, since the washing performance and good sealing, and when the valve seat diameter is lower than the valve core diameter poor reliability. Single seat valve, flow valve, sealing sleeve Industrial Valves generally choose away and when flushing powerful or have since wash regulation can choose flow closed. Two type quick opening characteristics of regulating valve flow closed form.

5, in addition to the single and double seat valve and sleeve valve what have adjust the function of the valve?

diaphragm valve, butterfly valves, valve type O, V type ball valve ( Adjustment than large, cutting effect) , axial force, rotary valve is all has the adjustment function of the valve.

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