Fisher 657 and 667 actuators valves are designed to provide dependable on/off or throttling operation of actuators valves
Fisher 657 and 667 actuators are designed to provide dependable on/off or throttling operation of control valves. These spring-opposed diaphragm actuators position the valve plug in the valve in response to varying controller or valve positioner pneumatic output signals. The 657 actuator is direct-acting, while the 667 is reverse-acting.
Actuation | Spring-return, Linear |
Certifications | SIL capable, ATEX, CUTR, PED |
Control Type | On/Off, Throttling |
Operating Temperature | Cryogenic, Low Temperature, Standard Temperature, High Temperature |
Power Source | Pneumatic, Manual |
Valve Type | Angle Valve Globe Valve |