Some questions about on-off valves?
Thread Content
1. On/off valve: pressure difference shutdown, critical pressure, compression coefficient, valve cover type: normal temperature type, actuator: spring-return cylinder, specification: single-action, solenoid valve: 2-way 3-position, valve position switch: dry contact. I don’t understand any of these terms. I would appreciate your advice, thank you. It would be best to show a sample.
1. On/off valve: Closing pressure difference refers to the pressure difference before and after the valve when it is closed； Critical pressure and compression coefficient are both physical property parameters of the process medium ； Valve cover type: Normal temperature type. The valve covers of control valves are available in normal temperature types, high temperature types, low temperature types, and diaphragm-sealed types to suit different operating conditions ； Actuator: spring-return cylinder. Cylinder-type actuators come in spring-return and springless types; the spring-return type requires only one control signal, while the springless type needs two control signals ； Specification: Single-acting, spring-return cylinder, also known as a single-acting actuator ； Solenoid valve: 2/3 way; solenoid valves are available in 2/3 way, 2/5 way, and other configurations ； Valve position switch: dry contact. It means that the output signal of the valve position switch is a dry contact switch signal.
1. What does 2-position 3-way mean for a solenoid valve? 2. What is the valve position switch used for? 3. What does single action mean in the specifications? 4. How does the actuator work?
It was already discussed on the forum; go here to check it out: http://bbs.hcbbs.com/viewthread.php?tid=91526&highlight=%C1%BD%CE%BB%C8%FD%CD%A8
1. The 2-position 3-way solenoid valve is a pneumatic solenoid directional control valve with 2 positions and 3 channels. 2. The function of the valve position switch is to indicate the status of the valve, whether it is in the open or closed position. 3. The single-action in the specifications means that only one side of the actuator’s cylinder is filled with air, and it returns to its original position due to the force of the spring. 4. The actuating mechanisms are available in pneumatic piston type and motor type; they usually utilize the linear motion of a piston or the rotation of a motor to drive a gear and rack mechanism, which in turn causes the valve disc to rotate and thus opens or closes the valve.
on off intake exhaust outlet