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Fisher® 657 and 667

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 size 30i-70i actuators improve ease of use with an integral mounting for Fisher FIELDVUE DVC6200 and DVC2000 digital valve controllers.
DocumentationFeatures & BenefitsSpecifications
 Product & Service Documentation
 Improving User Experience, Fisher 657 and 667 Size i Actuators
977 KBjpgJuly 2015C
 Improving User Experience, Fisher 657 Size i Actuators
4 MBpdfJuly 2015B
 Data Sheets - Bulletins - Catalogs
 Fisher 657 and 667 Diaphragm Actuators
354 KBpdfJuly 2016L
 Fisher 657 and 667 Size 30i - 76i Diaphragm Actuators
372 KBpdfJuly 2016D
 Fisher Sliding-Stem Valve Selection Guide
507 KBpdfMarch 2013G
 Manuals & Guides
 657 Sizes 30i-70i Diaphragm Actuators Management of Change Guide
886 KBpdfJune 2015B
 Fisher 657 Diaphragm Actuator Sizes 30/30i through 70/70i and 87
586 KBpdfJuly 2016S
 Fisher 657 Diaphragm Actuators Size 80 and 100
323 KBpdfDecember 2010K
 Fisher 667 Diaphragm Actuator Sizes 30/30i-76/76i and 87
802 KBpdfMarch 2016R
 Fisher 667 Diaphragm Actuators Size 80 and 100
355 KBpdfMay 2011J