UL Listed air-aspirating foam discharge device designed to protect vertical fixed roof (cone) liquid storage tanks, with or without an internal floating roof, using low expansion foam systems. Classified as a Type II discharge outlet under NFPA 11, the Foam Chamber delivers aspirated foam gently onto the surface of flammable liquids via an integral deflector, which reduces foam velocity and allows it to slide down the tank wall — minimising fuel disturbance and submergence.

Each unit includes a frangible glass vapour seal to prevent tank vapour from entering the foam solution pipe, a field-replaceable orifice plate sized for the required flow, and a stainless steel air inlet screen to exclude birds and insects. The removable inspection cover allows foam sampling and system testing without disturbing the vapour seal or disconnecting the chamber from the tank.

Key Specs:

• Models: FCA (Carbon Steel) | FCA-S (Stainless Steel)
• Inlet Sizes: 65NB, 80NB, 100NB
• Working Pressure: 2.8 to 7 Kg/sq.cm (40 to 100 PSI)
• Flow Range: 150 to 1,780 LPM
• Vapour Seal Rupture Pressure: 0.7 to 1.75 Kg/sq.cm (10 to 25 PSI)
• Max Back Pressure on Vapour Seal: 0.07 Kg/sq.cm (1.0 PSI)
• Deflector: Solid (Model FD) or Split (Model SD) — Carbon Steel standard, Stainless Steel optional
• Finish: Red RAL 3000
• Approval: UL Listed

K-Factor Selection Guide:

Compatible with Inline Foam Inductors, Balance Pressure Foam Proportioning Systems, Bladder Tank Proportioners, and Foam Tenders. Not suitable for pressurised or inert gas blanketed storage tanks.