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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.

Gauge Hatch Cover

Varec Biogas 42 Gauge Hatch Cover

Varec 42 Series Sampling and Gauging Hatch Covers are designed to provide quick access for product gauging, temperature measurement or sampling. They are installed on tank roofs or roof flanges. Model 42 Hatch Covers are secured by tightening the handwheel. A padlock feature is incorporated to prevent unauthorized tank access through the hatch. The Model 42 hatch cover maintains a gas-tight seal at working pressures of up to 3 PSIG (20.7 kPa), when supplied with a Buna-N insert. Varec Model 42 covers are designed with a foot pedal which provides quick tank access for sampling. This pedal is depressed to open the cover. The cover will stay open enabling the operator free use of both hands to gauge or sample the tank contents.



  • Handwheel with padlock feature
  • Sizes 4? through 10? Non-sparking Design
  • Corrosion resistant 356 HT aluminum
  • Safety foot pedal
  • Buna-N, Viton or Teflon inserts

Varec Biogas 4310 Gauge Hatch Cover

Varec 4310 Series Hatch Covers can operate as free opening or lock down devices. When used as free opening, the aluminum cover will open to relieve tank pressure at approximately 1.0 Oz/In2 or 1.73 inches W.C. (44mm W.C.). The hatch cover can be locked down by the insertion of a lock pin (provided as standard) in a retaining hole between the cover and base.

While in the lock down position, the hatch maintains pressures up to 3 PSIG (20.7kPa). Unauthorized tank access can be prevented by use of a padlock.

Varec 4310 Series covers are designed with a foot pedal which allows fast, hands free tank access for sampling and gauging. The cover is self aligning and closes automatically when the foot pedal is released.


  • Non-sparking design
  • Positive sealing soft seat inserts
  • Corrosion resistant construction
  • Locking mechanism raised above cover surface for easy access
  • Large, easy to grab, pull ring
  • Safety foot pedal
  • Standard sizes 4″ and 8″