Fisher 644 and 645 actuators are used to automatically control steam-driven boiler feedwater pumps (reciprocating or turbine). The 644 or 645 actuator, when used in combination with one of several push-down-to-close sliding-stem valves, forms a pump governor. 644 and 645 actuators may also be combined with push-down-to-open valves to be used as relief governors.
- Actuation
- Manual
- Certifications
- CUTR
- Control Type
- On/Off
- Operating Temperature
- Standard Temperature
- Power Source
- Manual
- Valve Type
- Globe Valve
- Other Configurations
- Contact your local Emerson business partner or sales office to learn about additional specifications or options for this product.
Features
- Steel and cast iron construction provides long service life.
- Few moving parts and easy access reduce maintenance and downtime.
- Spring adjustment is readily accessible without removing any parts.
- Direct-operated configuration provides fast speed of response.
