Vent to Atmosphere

Vent to Atmosphere

Model L1200A

Vent to Atmosphere

Model L1200A 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 L1200A retains toxic vapors, atmospheric contamination is minimized. This helps to provide increased fire protection and safety.


Sizes - 2" (DN 50) through 12" (DN 300)
Material - Available in aluminum, carbon steel, stainless steel, fiberglass and other materials

Pressure - 0.5 oz/in2 to 15 psig
Vacuum - 0.5 oz/in2 to 12 psig


The L1200 series 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 L1200 series 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. To insure the proper alignment of seating surfaces, there is peripheral guiding and a center stabilizing system.


• Buna-N, Fluoropolymer, FKM and other seating diaphragms
• Steam Jacket
• Spacer


Vent to Atmosphere

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Vent to Atmosphere

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