Hydro Gate® flap gates are made of cast iron, stainless steel, aluminum, or rubber depending on the type of service. A small differential pressure on the back of the gate causes it to open automatically to allow discharge through levees, sewer lines or drainage conduits.

Agri Drain Standard Flap Gates are designed to help keep damaging water out of drainage systems, and help keep drainage systems from flooding.

The Series 6000 Flap Gate Valves allow outflow of water from a pipe or structure to a body of water, but prevents backflow. The Series 6000 is used in systems where seating heads are ten feet or less.

Waterman SSF-41 (round) and SSF-43 (rectangular) Fabricated Stainless Steel Drainage (Flap) Gates are corrosion-resistant, rust-proof automatic drainage gates designed for flange mounting or wall mounting.

Rodney Hunt’s circular and rectangular flap gates are designed to withstand stresses from high seating heads and to maintain maximum sensitivity of unseating heads.

Hydro Gate® flap gates are made of cast iron or ductile iron, depending on the type of service. A small diferential pressure on the back of the gate causes it to open automatically to allow discharge through levees, sewer lines or drainage conduits.

Waterman SSF-41 and SSF-43 Fabricated Stainless Steel Drainage (Flap) Gates offer a corrosion-resistant, rust-proof automatic drainage gate designed for flange mounting or wall mounting. J-bulb neoprene adjustable seats provide excellent sealing against return flow.

Our flap gates are renowned for their robust construction and high performance. The 450 Series features a rugged, reinforced construction that stands up to the toughest operational demands. Equipped with a resilient seal, the gates are engineered to provide a …

Aug 31, 2021 · What is a flap gate? A flap gate is a flow control device that functions as a check valve, allowing water to flow through it in only one direction. These special gates are mainly employed to control the flow of water through flood barriers, reservoirs and rivers.

SERIES N flap gate is the simplest way to prevent flow from returning back into pipes or openings. The gate design is such that whatever the size, a small flow will open the gate in negative pressure but it will remain watertight under positive pressure.