On the selection of torque for switch valve actuators
Thread Content
The actuator selected shall be capable of ensuring full-stroke operation of the valve at the higher of the following pressure differences: 125% of the upstream operating pressure, or 110% of the maximum closing pressure difference specified in the instrument data sheet. Under what conditions is the torque for operating a valve calculated? It seems there is a requirement of 1.2 to 1.5 times.
The maximum output torque of the actuator should be at least 1.5 times the maximum torque of the valve, and the torsional strength of the valve shaft should be at least 1.15 times the maximum output torque of the actuator.
What determines the maximum torque of a valve?
What’s the point of these three posts upstairs that are just asking questions and giving answers themselves?
My experience. The cutting torque required on the process side is specified as “”. . the larger one”. Multiply by 1.2 again to select the actuator; this coefficient is safe enough to close the valve completely. For the actuator you choose for this application, its output torque should be somewhat higher than that of the previous one; therefore, it is important to ensure that the torque that the valve stem can withstand is not too low. It is advisable to require that the torque capacity of the valve stem be 1.5 times greater than the cutting torque. An overly large actuator is harmful to the valve.
Hello, my WeChat ID is 13142062324. I’d like to get some information about a company, so please add me