Share Us!


Model 1220A is used for pressure and vacuum relief where vapors must be piped away. Escaping vapors are piped away through a flanged outlet connection. This helps to provide increased fire protection and safety.Special features
Model 1220A 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 1220A has a self draining housing body and drip rings to protect seating surfaces from condensate and freezing. This design also avoids pressure or vacuum buildup due to binding or clogging of the valve. Buna-N, FKM, and other seating diaphragms can be provided when required. Model 1221B may be spring loaded when required for use on blanketed tanks or other type installation requiring higher settings. To insure the proper alignment of seating surfaces there is peripheral guiding and a center stabilizing stem.

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, 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.


There are no reviews yet.

Be the first to review “Model 1220A”

Your email address will not be published. Required fields are marked *