Fisher 667 Diaphragm Actuator
Manufacturer: Fisher — Fisher 657/667
Part number: 667
Category: Valves
Reverse-acting spring-opposed diaphragm actuator for on/off or throttling operation of sliding-stem control valves.
Description
The Fisher 667 is a reverse-acting, spring-opposed diaphragm actuator designed for dependable on/off or throttling operation of control valves. It positions the valve plug in response to varying controller or valve positioner pneumatic output signals. The integral mounting pad eliminates the traditional mounting bracket and reduces the number of parts required. An integral air passage eliminates the need for external tubing and fittings when paired with a Fisher FIELDVUE instrument. The 667 can be externally tubed for instruments or accessories when required. Compatible with instruments utilizing traditional bracket-based mounting kits.
Applications
- Globe valve actuation
- sliding-stem valve control
- reverse-acting applications
- fail-open service
- general process control
Industries
- Oil & Gas
- Refining
- Chemical
- Power Generation
- Pulp & Paper
- Mining
- Water & Wastewater
- Pharmaceutical
Available on request — pricing is quoted per enquiry. Request a quotation.