SIGMAHLR

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. Oil and gas companies across the world rely upon HLR Controls Inc. to deliver the highest quality safety system controls in the industry. We have earned an outstanding reputation for designing and manufacturing reliable and innovative pneumatic and hydraulic instruments that enhance worker safety while also protecting equipment and the environment. HLR Controls Inc. – a company renowned for providing quality, simple-to-operate safety control products.