HWE Flap Gates
HWE Flap Gates are made up of cast iron or ductile iron 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. When water on the face side of the gate rises above water on the back side, the gate closes automatically to prevent backflow.
Flap gates are equipped with flat back seats for attaching to wall thimbles, new concrete headwalls, existing walls or pipe flanges. The seat or frame of the flap gate is attached to a wall or pipe flange and forms the opening through which water passes. Since the gate opens or closes automatically, a mechanical lifting device is not necessary.
These are used for automatic drainage from outfall structure to rivers,
estuaries and sea and for preventing reverse flow during flood/tide from river,
estuaries and sea to the plant.
SALIENT FEATURES
| • |
Opening
against nominal differential pressure. |
| • |
Sturdy
construction to account for pulsating motion. |
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Flange back
frame designed for mounting on face of wall. |
| • |
Metal to
metal sealing on the periphery of gate aperture. |
| • |
Adjustable
hinge bolt of toughened steel to reduce/increase sensitivity of flap operation
in installed condition. |
| • |
Rigidly
designed cast iron hinge bracket. |
| • |
Replaceable
hinge bushes of Bronze. |
| • |
Replaceable
hinge pins of Stainless steel. | | 
