Fisher 657 Direct-Acting Pneumatic Actuator Size 45 0.4 to 2.0 bar (6 to 30 psig)

657-45-6-30

Fisher 657 direct-acting actuator, Size 45, 0.4 to 2.0 bar (6 to 30 psig). High thrust capability, molded diaphragm, rugged cast iron/steel construction. Genuine, ready stock, bulk pricing available.

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The Fisher 657 direct-acting diaphragm actuator (Size 45, 0.4 to 2.0 bar (6 to 30 psig)) features a molded diaphragm in a deep casing for excellent linearity, high thrust capability, and rugged thick-walled cast iron or steel construction. Its split-block stem connection provides solid motion transfer for accurate valve positioning.

Key Features

  • Top- and side-mounted handwheels available
  • Maximum allowable thrust 25132 N
  • Rugged thick-walled cast iron and steel construction
  • Molded diaphragm, deep casing for excellent linearity
  • Temperature range -40 to 82 C standard, to 149 C with silicone diaphragm
  • Direct-acting, spring-opposed design for fail-safe positioning

Full Configuration Details

Complete Ordering Code:
657
Actuator Specifications
Size
Actuator Size
Size 45
Spring
Spring Range
0.4 to 2.0 bar (6 to 30 psig)
Area
Effective Diaphragm Area
677 cm2
Travel
Maximum Travel
51 mm
Thrust
Max Allowable Thrust
25132 N
Action
Action
Direct-acting
Temp
Temperature Range
-40 to 82 C (standard)
Conn
Signal Connection
1/4 NPT internal

Factory-Direct Price & Fast Shipping

We supply Fisher 657 diaphragm actuators factory-direct with competitive bulk pricing. Large ready stock ships within 48 hours via DHL/FedEx worldwide, and every unit is 100% genuine and brand new with a 1-year warranty. Send your size and spring range for a quote within 12 hours.

Request a Quote

Email: sales@gt-exim.com  |  WhatsApp: +86 17719526488

Full Configuration Details

Complete Ordering Code:
657
Actuator Specifications
Size
Actuator Size
Size 45
Spring
Spring Range
0.4 to 2.0 bar (6 to 30 psig)
Area
Effective Diaphragm Area
677 cm2
Travel
Maximum Travel
51 mm
Thrust
Max Allowable Thrust
25132 N
Action
Action
Direct-acting
Temp
Temperature Range
-40 to 82 C (standard)
Conn
Signal Connection
1/4 NPT internal

Documents

Manuals: