Fisher 657 Spring-Opposed Diaphragm Actuator Size 100 0.4 to 2.0 bar (6 to 30 psig)
Fisher 657 direct-acting spring-opposed diaphragm actuator, Size 100, 0.4 to 2.0 bar (6 to 30 psig) spring range, 102 mm travel, 2902 cm2 effective diaphragm area. 1-year warranty with wholesale bulk pricing and fast global shipping.
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- 100% Genuine & Brand New
- Global Fast Shipping via DHL/FedEx
- Fast Quotation within 12 Hours
- 1-Year Warranty Guaranteed
Engineered for reliable control-valve positioning, the Fisher 657 (Size 100, 0.4 to 2.0 bar (6 to 30 psig)) applies air pressure to the upper diaphragm casing to drive the stem downward against the spring. It provides fail-open action on push-down-to-close valves and fail-closed action on push-down-to-open valves, with 102 mm travel and 2902 cm2 diaphragm area.
Key Features
- Temperature range -40 to 82 C standard, to 149 C with silicone diaphragm
- Molded diaphragm, deep casing for excellent linearity
- Direct-acting, spring-opposed design for fail-safe positioning
- Effective diaphragm area 2902 cm2, 102 mm travel
- SIL3 capable, certified by exida
- Top- and side-mounted handwheels available
Genuine Parts, Fast Delivery, Full Support
Every 657 actuator is factory-certified, 100% genuine, and covered by a 1-year warranty with after-sales technical support. Ready stock ships within 48 hours worldwide. Bulk pricing available — contact us for a quote within 12 hours.
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Email: sales@gt-exim.com | WhatsApp: +86 17719526488
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