Cast Iron and Fabricated Flap Gates

Backflow Prevention in Free Discharge Applications

Backflow prevention in free discharge
Cast or fabricated, rigid or flexible designs
Circular or rectangular opening upto 96′ for gravity flow

Gravity Operated

Minimal water pressure is needed for operation as the flap gate functions utilizing gravity. The flap opens when the head in the pipe, or conduit, exceeds 0.2 feet (0.6m) above the head in the receiving body of water. The flap closes when the head in the receiving body of water exceeds the head in the pipe or conduit. There is minimal head loss when fully open.

Low Leakage

Cast iron to resilient or bronze-to-bronze seating is available on cast iron flap gates, and resilient to stainless steel seating on fabricated flap gates. Both provide a tight seal for low leakage when closed.

Cast or Fabricated

Depending on application, installation, and preferences, flap gates are available in high strength stainless steel (ASTM A-240 Type 304L or 316L) or cast iron (A126 Class B).

Low Maintenance

All flap gate models offer high corrosion resistance, low maintenance, and a variety of mounting options.

Series FV-SPR

• Low cost backflow prevention
• Cast Iron with stainless steel pivot hardware
• Resilient seated
• Single Pivot
• 4” – 30” (100mm – 750mm)

Series FV-AC and FV-ACP

• Engineered for high seating heads
• Designed to handle forward and reverse pump surges
(Series ACP)
• Spring bumper limits disc travel to 90º (Series ACP)
• Anti-locking bar eliminates flap over-turn damage
• Cast Iron with stainless steel pivot hardware
• Cast iron to resilient or bronze seating
• Adjustable double pivot design
• 4” – 96” (100mm – 2400mm)

Series FV-AR

• For rectangular or square openings
• Cast iron to resilient or bronze-to-bronze seating
• Double pivot design
• 12” x 12” to 144” x 144” (300mm x 300mm –
3650mm x 3650mm)
• Custom designed for specific head conditions

Series FG-60

• Circular fabricated stainless steel
• Resilient to stainless steel seating
• Hinges feature UHMWPE self-lubricating bushings
• Wall or pipe-mounted
• 6” – 96” (150mm – 2400mm)

Series FR-40

• For rectangular or square openings
• Fabricated stainless steel
• Neoprene to stainless steel seating
• Hinges feature UHMWPE self-lubricating bushings
• 12” to 96” (300mm – 2400mm)
• Custom designed for specific head conditions

Flexible Flap Gate

• For quiet operation
• Opens under very low unseating head
• Withstands slamming action of pump discharge and
wave action
• Stainless steel frame with flexible reinforced
neoprene flap
• Neoprene to neoprene seating for low leakage
• Custom sized for application

Brochure

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