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How do I choose an actuator for a butterfly valve? Choose a butterfly valve's actuator based on the available power source (e.g., manual, electric, pneumatic, and hydraulic) and the design elements of the application. What are the different types of butterfly valve actuation methods?
Valve Sizing Calculations (Traditional Method) Introduction. Fisher® regulators and valves have traditionally been sized using equations derived by the company. There are now standardized calculations that are becoming accepted worldwide.
According to AWWA C504, the actuator sizing torque (AST) should be calculated by the actuator manufacturer and based on the MRST times the AF. These requirements have been added to the 2015 versions of the AWWA butterfly and ball valve standards.
SECTION 2 VALVE SIZING PROCEDURE Introduction .....2‐1 Sizing Valves for Liquids .....2‐1 Liquid Sizing Sample Problems .....2‐8 Sizing Valves for Compressible Fluids .....2‐12
Affected parameters for actuator selection include the availability of a power source, torque and size of the valve, failure mode, speed of operation, frequency and ease of operation, control accessories, hazardous area, and cost.
Control Valve terminology, bodies, trim, flow characteristics, Cv and Kv sizing, noise, actuators, positioners and more.
Actuator Sizing. Sizing actuators for on-off service is fairly straightforward, requiring only that an actuator be selected with a torque output slightly higher than the seating and unseating torque of the valve. The situation is more complex with control valves. The torque output of most rotary actuator's changes with the angle of opening.