What is the difference between electric stainless steel valves and pneumatic stainless steel valves? Which One is better?
Pneumatic stainless steel valve is a feature that uses compressed air to drive the movement of multiple groups of combined pneumatic pistons in the actuator, transmitting force to the beam and inner curved track, driving the hollow core spindle to rotate, and the compressed air disk is delivered to each cylinder to change the inlet and outlet positions In order to change the rotation direction of the main shaft, according to the requirements of the load (stainless steel valve) required rotation torque, the number of cylinder combinations can be adjusted to drive the load (stainless steel valve) to work.
Two-position five-way solenoid valves are usually used in conjunction with double-acting pneumatic actuators. Two positions are controllable in two positions:Open and Close.Five channels are ventilated with five channels, one of which is connected to the air source, two are connected to the inlet and outlet ports of the external air chamber of the double-acting cylinder, and the two are connected to the inlet and outlet ports of the internal air chamber. The detailed working principle can refer to the working principle of double-acting pneumatic actuator.
1. Reliability of stainless steel valves. We usually think that pneumatic stainless steel valves are highly reliable;Poor reliability of electric stainless steel valves. However, the new-generation electric stainless steel valve implementation mechanism adopts new circuit integration technology.After eliminating the previous fatal weakness, the implementing agency can be used for an average of 5-10 years, thereby reaching or exceeding the service life of pneumatic stainless steel valves.
2. On-site power source. Pneumatic stainless steel valves are mostly used in the places where explosion-proof requirements are extremely high-one of the advantages of pneumatic stainless steel valves is intrinsically safe explosion-proof. The implementation mechanism of electric stainless steel valve can take the material locally, and the electric stainless steel valve is preferred when the explosion-proof requirements are not high and it is not convenient to equip the gas source.
3. price: Electric stainless steel valve implementation mechanism and pneumatic stainless steel valve implementation mechanism + stainless steel valve positioner technical indicators are basically the same. Pneumatic stainless steel valves need to be equipped with air source facilities such as air compressor stations, so the selection of electric stainless steel valves has an advantage in price.
4. Outstanding effort: The selection of the implementing agency is determined according to the type of stainless steel valve and the allowable pressure difference. Therefore, the detailed selection should be determined according to the actual situation
5. Fire and explosion protection. As to fire and explosion protection, pneumatic actuators + stainless steel valve positioners are superior to electric actuators. Only a few electric actuators can be produced into explosion-proof series.Highly flammable, explosive and other special occasions usually do not permit the use of electric actuators.
