What Does Single And Double In Ball Valve Mean And The Difference Between Them
What does single and double mean in ball valves and the difference between them? Time: 4/26/2019 7:08:41 AM
Single ball valve is the abbreviation of single-acting pneumatic ball valve; double ball valve is the abbreviation of double-acting pneumatic ball valve.
Ball Valve is air-open and spring-closed; while double-acting pneumatic ball valve is air-open and air-closed.
Single/double ball valves are actually divided according to actuators. Actuators include single-acting pneumatic actuators and double-acting pneumatic actuators.
Single-acting pneumatic actuators have one more pair of springs than double-acting actuators. When the air source is lost, the spring resets the actuator.
For hazardous media or when it is necessary to maintain a safe and comprehensive working condition when the air source is lost, it is recommended to use single-acting.
When selecting, the spring force must be selected according to the size of the on-site air source pressure, otherwise the air source pressure may be less than the spring force to overcome the actuator and the actuator cannot be driven.
When selecting an actuator, the factor that the spring force gradually decreases should be taken into consideration to ensure that the minimum spring force can drive the valve normally.
