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Varec Biogas

Varec (VApor RECovery Specialty Company) began business in the 1930's at its manufacturing plant in Compton, California. Varec was there in the infancy stage of the biogas market in the early 1950's. From the onset, Varec's focus was to deliver Biogas Handling products that suited customers' specific requirements, even if it meant creating the product off the drawing board. Varec initially sold direct to end-users and in the 1970's instituted a Sales Representative Network that catered to Municipal Wastewater Treatment Plants. A select number of Sales Representatives in the United States helped Varec acquire approximately 90% installed base from the 2,500 Wastewater Treatment Plants that utilize Anaerobic Digesters for Biosolids Treatment built between the mid-60's to late 70's. Today, Varec Biogas is 100% dedicated in providing total solutions to the biogas market. In February, 2003, Westech Industrial Inc. acquired the biogas portion of the Varec business from Tyco Valves and Controls, LP Inc.

Back Pressure Check Valve

Varec Biogas 211 Back Pressure Check Valve

The Varec 211 Series is designed for low pressure gas lines where maximum flow with minimum pressure drop is required. It should be installed downstream of flow meters, regulators, or other equipment that could be damaged by an accidental reversal of the gas flow direction or from pressure or shock waves. The 211 Series uses a free swinging pendulum which is forced open by positive pressure from the gas flow direction and closes should a reversal of flow occur.



  • Maximum Flow with Minimum Pressure Drop
  • Removable/Replaceable Seat Ring
  • Heavy Wall Cast Housing in 356 HT Aluminum
  • Flanged Or Threaded Connections
  • Sizes 2″ through 8″