UL Listed air-aspirating foam generator designed for the protection of tank seals in vertical liquid storage tanks with internal floating roofs, in accordance with NFPA 11. Classified as a Type II discharge outlet, the Foam Maker delivers low expansion aspirated foam gently into the annular ring seal area between the floating roof rim and the tank shell — minimising foam submergence and surface disturbance.

Operating on a venturi principle, the foam maker draws air into the foam solution stream through a stainless steel screened inlet — preventing ingress from birds and insects — before directing the aerated foam into the foam pourer for controlled application. The field-replaceable orifice allows for easy adjustment if design parameters change.

Key Specs:

• Models: FMA (Carbon Steel) | FMA-S (Stainless Steel)
• Inlet Sizes: 50NB, 65NB
• Working Pressure: 2.8 to 7 Kg/sq.cm (40 to 100 PSI)
• Flow Range: 75 to 550 LPM
• Flange Connection: ANSI B16.5 Class 150#
• Finish: Red RAL 3000
• Approval: UL Listed

K-Factor Selection Guide:

Compatible with Inline Foam Inductors, Balance Pressure Foam Proportioning Systems, Bladder Tank Systems, and Foam Tenders. Foam Pourer Model FP55 supplied as standard in carbon steel, with stainless steel available as an option.