Pressure / Vacuum Valve and Flame Arrester (Piped Discharge) MODEL 8820A

The Model 8820A combination units are used for pressure and vacuum relief in applications where vapors must be piped away. They are designed to protect your tank from damage caused by overpressure or excessive vacuum, while also providing protection against external heat and ignition sources. The result is lower emission levels and greater fire protection and safety.

The Groth Model 8820A combines the Model 1220A Pressure/Vacuum Relief Valve with the Groth Model 7618A Flame Arrester. High-performance Buna-N seat diaphragms are standard on the valve, ensuring an additional tight seal to prevent the leakage of sludge vapors. The self-draining housing body and drip rings protect the seating surface from condensate and freezing.

The Model 8820A Pressure/Vacuum Relief Valve with flanged outlet for pipe-away discharge features Groth's exclusive "air-cushioned" seat. High-performance fluoropolymer seat diaphragms are standard to minimize sticking caused by resinous vapors and atmospheric moisture. Self-draining housings and drip rings protect the seating surfaces from condensate and freezing.

End-of-Line

Flanged outlet with or without discharge piping

Gas Group: NEC D, IEC IIA

Operating temperature: ≤ 140°F (60°C)

Pressure before ignition: Atmosphere

Discharge pipe length: ≤ 10 pipe diameters

In-Line

Gas Group: IEC IIA1, Methane

(includes most biogas applications)

Operating temperature: ≤ 140°F (60°C)

Pressure before ignition: ≤ 1 psig

Inlet length:

≤ 50 pipe diameters (2")

≤ 20 pipe diameters (3")

≤ 10 pipe diameters (4"–12")

Sizes: 2" (DN 50) to 12" (DN 300)

Pressure settings: 0.5 oz/in² to 15 psig

Vacuum settings: 0.5 oz/in² to 12 psig

Materials: Aluminum, Carbon Steel, Stainless Steel, and other materials

Buna-N, fluoropolymer, FKM, and other seat diaphragms