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Fisher 644 and 645 Actuators
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.
Features
1.Steel and cast iron construction provides long service life.
2.Few moving parts and easy access reduce maintenance and downtime.
3.Spring adjustment is readily accessible without removing any parts.
4.Direct-operated configuration provides fast speed of response.
Specifications
Actuation：Manual
Certifications：CUTR
Control Type：On/Off
Operating Temperature：Standard Temperature
Power Source：Manual
Valve Type：Globe Valve
Pictures show
Application area
能源
化工
矿业
医药
