UL Listed air-aspirating rim seal foam pourer designed for the protection of open top floating roof storage tanks in accordance with NFPA 11. Classified as a Type II discharge outlet, the RPA delivers fully aspirated low expansion foam directly and gently into the annular seal area between the floating roof rim and the tank shell.

Comprising an integrated foam maker, windshield, and integral deflector, the RPA unit is a complete, self-contained assembly. Each unit is supplied with a flow-specific orifice plate, with a field-replaceable orifice to accommodate future design changes. Air is drawn into the foam solution via a venturi inlet and filtered through a stainless steel screen to prevent ingress from birds and insects.

Key Specs:

• Models: RPA (Carbon Steel) | RPA-S (Stainless Steel)
• Inlet Size: 65NB
• Working Pressure: 2.8 to 7 Kg/sq.cm (40 to 100 PSI)
• Flow Range: 50 to 550 LPM
• Flange Connection: ANSI B16.5 Class 150#
• Finish: Red RAL 3000
• Approval: UL Listed

Compatible with Inline Foam Inductors, Balance Pressure Foam Proportioning Systems, Bladder Tank Systems, and Foam Tenders. System design must comply with NFPA 11. A pressure gauge provision at the RPA inlet is recommended during commissioning.