The advantages and disadvantages of hydraulic pneumatic valve device, rounding

hydraulic pneumatic valve device is to use liquid pressure or adjust the driving gear of pneumatic valves, opening and closing it by control, motivation and actuators composed of three parts. Control part is controlled by pressure pneumatic valve, pneumatic valve flow control, direction control pneumatic valve and electric control system composition and so on. Drive by electric motor or pneumatic motor, hydraulic pump, fuel tanks and other parts, is the effective power of the electric or pneumatic motor rotating shafts of can into hydraulic transmission fluid pressure. Hydraulic pneumatic valve actuator device has two kinds, one kind is the hydraulic cylinder actuators, realize the reciprocating linear motion, the other is a hydraulic motor actuators, realize the rotary motion, hydraulic pneumatic valve device is as follows: the advantages and disadvantages of
( A) Hydraulic pneumatic valve device advantages
) Simple and compact structure, small volume;
) Is stable and reliable;
) Can get a lot of output torque;
) The output torque can be accurately through constant pressure relief pneumatic valve adjustment, including the opening and closing torque adjustment, even can be reflected directly by hydraulic pressure instrument;
) Speed regulation is convenient;
) When the power, the sudden accident, still can use accumulator to one or several power operation. The long distance pipeline automatic emergency cut off pneumatic valve and wellhead discharge pneumatic valve has a special significance.
( 2) Hydraulic pneumatic valve device faults
) Oil temperature are greatly influenced by environmental temperature, the oil temperature change caused by oil viscosity changes, affect the operation;
) Piping trouble, easy to produce leakage;
) Not suitable for various operations on signals ( Such as signal amplification, memory, logic, etc. ) The occasion.
hydraulic pneumatic valve device has the advantage of its shortcomings, we will know how to foster strengths and circumvent weaknesses in the process of use, give full play to its advantages, and avoid the disadvantages.