Flap gate
What is flap gates?
LecoTech Flap Gate is made of exceptionally strong & tough High Density Polyethylene (HDPE) Pipe and Sheet. 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, headwalls, and existing 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.
Flap Gates Application and uses :-
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Flood Control
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Municipal Projects
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Farm Levees
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Sewer Outfalls
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Industrial Waste Lines
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Water & Sewage Treatment Plants
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Tidal Drainage
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Irrigation Systems
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Pump Discharge Control
HDPE Flap Gates Advantages :-
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Light Weight
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Easy to Install
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UV Protection
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Corrosion Proof
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High Temperature Resistance
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Chemical Resistance
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Maintenance Free
HDPE FLAP GATE SPECIFICATION TABLE
General HDPE Flap Gate Characteristic
Density
Melting Temperature
Distortion Temperature
Vicat-B Temperature
Glass Transition Tempearture
Water Absorption
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Physical Characteristic Application Temperature
Thermal Conduction Coefficient at 20°C
lLinear Expansion Coeeficient
Mechanical Characteristic Tensile Strength
Elongation on breaking
Elongation / Breaking ratio
Bending Strength
Elasticity Modulus under Tension
Hardness
Ball thrust Hardness
Notched-Bar Impact test
Chemical Resitance
Organic Acid
Inorganic Acid
Oxidizing Acid
Bases
Alcohols
Ketones
Aliphatic Compounds
Aromatic Compounds
Trichoroethylene
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0.95 g/cm3
125-130 °C
130-140 °C
70 °C
110 °C
0%​
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-50 - +85°C
0.43 W/mK
150 - 300 103/K
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22 N/mm2
15%
> 800%
10 - 40 N/mm2
150 - 800 N/mm2
63 Shore-D
40-80 Mpa
12 KJ/m2
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Resistant
Resistant
Partially Resistant
Resistant
Resistant
Resistant
Resistant
Partially Resistant
Partially Resistant
TYPE OF FLAP GATES
There are three main type of design available for flap gates that suitable for each particular need and design.
Cast Iron Flap Gate
Rectangle Flap Gate
Round Flap Gate
Apart from the traditional HDPE Flap Gates that commonly used in Malaysia, Flap gates can also be manufactured in different materials to suit the requirement needed such as Mild Steel, Cast Iron and Stainless Steel.