ProductsI Robertshaw
Control Valves
Model VC-230A and VC-231A
Model VC-230A and VC-231A 

The VC-230A and VC-231A are spring-opposed diaphragm actuators. They are designed to provide dependable on/off or throttling operation of control valves.

Other features include:

Molded buna-N diaphragms, nylon reinforced

Steel diaphragm cases

Multiple steel springs

Sturdy cast iron lower frame

Quick disconnect valve stem construction

Valve position indicator

Field reversible

Manual Models VC-230A and VC231A

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