Fisher 657 and 667 diaphragm actuators, 100% New & Original, low price promotion-hkxytech
  • Fisher 657 and 667 diaphragm actuators, 100% New & Original, low price promotion

Fisher 657 and 667 diaphragm actuators, 100% New & Original, low price promotion

2021-03-02 17:05:29

Description:

Fisher 657 and 667 spring-opposed diaphragm actuators position the valve plug in the valve in response to varying controller or valve positioner pneumatic output signals applied to the actuator diaphragm.……

Notice:

New Products

Emerson TREXCHPNA9P3 AMS Trex device communicator

Emerson TREXCHPNA9P3 AMS Trex device communicator, HART Application, 3 Years Premium Support.

Emerson TREXCHPNA9P1S AMS Trex device communicator

Emerson TREXCHPNA9P1S AMS Trex device communicator, HART Application, 1 Year Premium Support, Carrying Case.

Emerson TREXCHPNA9P1 AMS Trex device communicator

Emerson TREXCHPNA9P1 AMS Trex device communicator, HART Application, 1 Year Premium Support.

Emerson TREXCHPNA9S3S AMS Trex device communicator

​Emerson TREXCHPNA9S3S AMS Trex device communicator, HART Application, 3 Years Standard Support, Carrying Case.

Assortments

Description

Fisher 657 and 667 spring-opposed diaphragm actuators position the valve plug in the valve in response to varying controller or valve positioner pneumatic output signals applied to the actuator diaphragm. Zero setting of the actuator is determined by the compression of the actuator spring. Span is set by both the actuator spring rate and the number of springs available. The 657 actuator is direct-acting; the 667 is reverse-acting. These actuators are designed to provide dependable on-off or throttling operation of automatic control valves.


Fisher 657 and 667 Features

● The integral mounting pad eliminates the traditional mounting bracket and reduces the number of parts required to mount.

● Incorporates an integral air passage that eliminates the need for external tubing and fittings when paired with a Fisher FIELDVUE™ instrument.

● Both 657 and 667 actuators are compatible with instruments that utilize traditional bracket-based mounting kits. The 667 can be externally tubed for instruments or accessories when required.

● Spring rates, travel stops, and manual operators are available for nearly any control valve application.

● A molded diaphragm travels in a deep diaphragm casing, minimizing area change throughout the travel.

● A shallow casing on the pressure side means reduced volume on that side, thereby minimizing response time.

● The molded diaphragm allows maximum thrust for given diaphragm size.

● Rugged thick-walled cast iron and steel construction provides increased stability and corrosion protection.


Fisher 657 and 667 Specifications

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