Fisher 667NS Diaphragm Actuator
Manufacturer: Fisher — 657/667
Part number: 667NS
Category: Valves
Spring-opposed diaphragm actuator, push-down-to-open (reverse acting). Sizes 40, 45, 70, and 80 available.
Description
Fisher 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 667 is the reverse-acting (push-down-to-open) version, complementing the 657 direct-acting design. The NS designation is available in sizes 40, 45, 70, and 80. The 657/667 actuator family is one of the most widely used actuator designs in process control.
Applications
- Control valve actuation
- throttling control
- on-off control
- process automation
- safety instrumented systems
Industries
- Oil & Gas
- Chemical
- Refining
- Power Generation
- Pulp & Paper
- Pharmaceutical
Available on request — pricing is quoted per enquiry. Request a quotation.