CONTROL VALVES
ESD
ACTUATORS
CVS 657, 667, 1051, 1061
Rack and Pinion
CONTROLLERS
REGULATORS
POSITIONERS
LIMIT SWITCH
670 MANUAL LOADING STN

7970 PRESSURE SENSOR

2000 PRESSURE PILOT

CENTRIFUGES
CHEMICAL PUMPS
THERMOMETERS
DEW POINT TESTERS
GAUGES
NORRISEAL CONTROLS
OTHER

ACTUATORS - CVS 657, 667, 1051, 1061

The CVS 657, CVS 667 sizes 30-80, and the CVS 1051 and 1061.

The series CVS 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 open” valves.

The series CVS 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 direction. If the signal pressure should fail, the spring will force the stem in the downward position providing “fail-closed action” for “push down to close” valves.

Both the Series 657 and Series 667 actuators are used for automatic operation of control valves used in applications where throttling or on/off service is required.

The series CVS 1051 and 1061 is used for on-off service without a positioner or for throttling service with a positioner. The stroking time is dependent on the actuator size, rotation, spring rate/compression, supply pressure, and size of supply line.

CVS Controls manufactures Control Valves and associated instrumentation products to specification that facilitate the direct replacement with FISHER* process control equipment.

* FISHER is a registered trademark of Fisher Controls International Inc. Fisher Controls International Inc. is not affiliated with CVS Controls Ltd. in any manner. Fisher Controls International Inc. has not reviewed, sanctioned or endorsed any products manufactured, reconditioned, sold or marketed by CVS Controls Ltd.