Design Features

The CVS Series 657 is a direct acting, spring opposed diaphragm actuator with a 4 inch maximum travel. Signal pressure supplied to the upper housing chamber forces the stem downward. When the signal pressure is reduced, the compressive force on the spring moves the stem upward. If the signal pressure should fail, the spring will force the stem in the upward direction providing “fail-open action” for “push down to close” valves.

The CVS Series 667 is a reverse acting, spring opposed, diaphragm actuator with a 4 inch maximum travel. When the signal pressure increases to the lower diaphragm casing, the actuator stem is forced upward compressing the spring. When the signal pressure is reduced, the spring moves the actuator stem in the downward position.

Industries

Oil & Gas, Geothermal, Power Plant, Chemical & Petrochemical

Materials

Aluminum / Steel

Pressure and Temperature

Size

30-70

Connection

Compatible with CVS Valve Connection