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Model 1200A is designed to protect your tank from damage created by overpressure or excessive vacuum. Costly product evaporation losses due to normal tank “breathing” are greatly reduced. Because the Model 1200A retains toxic vapors, atmospheric contamination is minimized. This helps to provide increased fire protection and safety.Model 1200A offers Groth’s special “cushioned air” seating. Superior performing fluoropolymer seating diaphragms are standard to minimize sticking caused by resinous vapors and atmospheric moisture. The Model 1200A has a self draining housing body and drip rings to protect seating surfaces from condensate and freezing. This design also avoids dangerous pressure or vacuum buildup  due to binding or clogging of the valve. Buna-N, FKM and other seating diaphragms can be provided when required. To insure the proper alignment of seating surfaces, there is peripheral guiding and a center stabilizing system.

Product Features

  • Sizes 2″ through 12″
  • Pressure settings 0.5 oz/in2 to 15 PSIG
  • Vacuum settings 0.5 oz/in2 to 12 PSIG
  • Available in aluminum, carbon steel, stainless steel, fiberglass, and other materials
  • Modular construction


Groth Corporation

A global leader in manufacturing pressure/vacuum relief valves, flame and detonation arresters, blanket gas regulators, and other low pressure relief products.


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