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Sigma Valves

Sigma Valves

Sigma Valves began producing stainless steel pneumatic and hydraulic control valves dedicated specifically for the oil and gas industry over forty years ago. Sigma Valves originated as a company dedicated to valves specifically designed for safety system automation in offshore environments, not industrial valves converted for use in the oil/gas industry. These valves offer more robust design features and dependability than those found in smaller industrial-type valves.

Products available in Alleima



check valves

control units

Shutdown Devices


Manual Relays


Vent Caps

Pressure Sensors

quick exhaust valves

Sand Probes