Model Selection &data
Actuator SelectionWhen Actuator Selection , you should add a safe value to the defined valve torque , for example , a 25% safe value to steam or non-lubricating liquid media ; a 3safe value to non-lubricating paste or liquid media , a 40% safe value to non-lubricating dry gas media a 60 % safe value to non-lubricating particle or powder mediatransmitted by gas ; a 20% safe value to clean and low-friction lubricating media ( the above are theoretical safe values recommended by our company , onlyreference )
Examples for selecting DR double-action actuators
When controlling a ball valve , with torque of 200NM , air supply pressure of bar , medium of non-lubricating steam , considering safety factors , you should add a25% afe value that is equal to 250NM you can nd the air supply pressure of bar in the double-action output torque table , and then search the equal oapproximate torque data in the vertical line and select 306 8NM and then search leftward the model in the line , and select AT125DR . ( Image 1 )
Examples for selecting SC single-action actuators
When controlling a butterfly valve , with torque of 100NM , air supply pressure of 4bar medium of non-lubricating dry gas , considering safety factors , you shoulddd a 40% safe value that is equal to 140NM search the spring resetting terminal in the single action output torque table for an approximate torque of 142NM andthen find leftward in the line the terminal torque of 156NM for the air supply pressure of 4bar you must the relative balance of air supply pressure torque and springresetting torque ; and then search the model and spring quantity leftward in the line , and select AT 140SC and 8 springs . ( Image 2 , 3 )
