Limit Switch Assembly

Indication of electrical position and status

Schlumberger Oilfield Services

Cameron's limit switch assembly is an accessory device mounted on the thread boss of the actuator, providing electrical position and status indication.

An upper and lower proximity switch furnishes independent indication of the surface safety valve’s (SSV’s) open and closed position. A small number of parts helps to ensure low maintenance and reliable service. Independent sealed proximity switch assemblies, as well as external jam nut connections, make adjustment easy and accessible.

Manufacturer General equipment GO switch
Model Series 70, Model 75
Conduit outlet size, in NPT 1/2 to 14
Type Single pole, double throw (SPFT)
Temperature range, degF [degC] –40 to 221 [–40 to 105]
Outlet position Bottom of enclosure
Hazardous areas approvals Zone 1
Certification approval British Approval Service for Electrical Equipment in Flammable Atmospheres (BESEEFA) and European Committee for Electrotechnical Standardization (CENELEC)
Total weight, lbm [kg] 12 [5.45]
Product weight, lbm [kg] 9 [4.09]
Limit Switch Assembly