657 Diaphragm Actuator Single Spring

657 Diaphragm Actuator Single Spring

Model TT-657 actuator is a direct-acting, spring-opposed diaphragm actuator. The actuator positions the valve plug in response to varying pneumatic loading pressure on the actuator diaphragm.

Additional information

Size:

657-30, 657-34, 657-40, 657-45, 657-46, 657-50, 657-60, 657-70

Description

Our Model TT-657 diaphragm actuator with a single spring is 100% to replace Fisher 657 actuators, which are designed to ensure stable on/off or throttling operation of the control valve. These spring-balanced membrane actuators respond to the pneumatic output signal of the controller or valve positioner to determine the position of the valve plug. 657 diaphragm actuator is a positive-acting.

Specifications:

  • Acting type: spring return, linear
  • Control type: on/off, throttling
  • Working temperature: low temperature, standard temperature, high temperature
  • Power supply: pneumatic, manual
  • Valve type: angle, globe
  • Sizes for 657 models: 657-30, 657-34, 657-40, 657-45, 657-46, 657-50, 657-60, 657-70
  • The diaphragm size of the actuator: 30, 34-40, 45-50, 46-60, 70

Instock

Actuator Size QTY
Actuator #657 – size 30 52
Actuator #657 – size 34 23
Actuator #657 – size 40 19
Actuator #657 – size 45 30
Actuator #657 – size 46 20
Actuator #657 – size 50 15
Actuator #657 – size 60 15
Actuator #657 – size 70 8

Replacement Diaphragm Part

657 Actuator size Part # Part # Part #
30 2E791902202 2E800002202 18B2713X082
34 or 40 2E670002202 2E669902202 18B2713X092
45 or 50 2E859502202 2E859602202 18B2713X102
46 or 60 2E859702202 2E859802202 18B2713X112
70 or 87 2N126902202 2N130902202 18B2713X122

Replacement Spring Part

Actuator Size Pres. Range Travel: 7/16” Travel: 5/8” Travel: 3/4”  Travel: 1-1/8” Travel: 1-1/2” Travel: 2”
30 3-15psig 1E795327082 1E795520792 1E792327092 N/A N/A N/A
6-30psig 1E795627082 1E795427082 1E79247082 N/A N/A N/A
34 or 40 3-15psig 1E805127082 1E804927082 1E805827082 1E805327092 1E805627092 N/A
6-30psig 1E805027082 1E804827082 1E805227082 1E805527082 1E805827082 N/A
45 or 50 3-15psig N/A 1E826727082 1E826227082 1E826127082 1E826627082 1E826927082
6-30psig N/A 1E825627082 1E825527082 1E826427082 1E826227082 1E826527082
46 or 60 3-15psig N/A 1E825827082 1E825727082 1E826227082 1E826527082 1E827027082
6-30psig N/A N/A 1E826027082 1E825527082 1E825720782 1E826327082

 

 

Additional information

Size:

657-30, 657-34, 657-40, 657-45, 657-46, 657-50, 657-60, 657-70

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