Flap check valve are a very traditional method of preventing back flow in pipelines, culverts and other applications to prevent flooding. The drain flap valve are manufactured using modern materials and the latest manufacturing techniques to ensure the very best products are achieved in the most efficient manner. Due to the unique lightweight properties of the HDPE that is used to manufacture the flap valve, they are very easy to install in comparison to cast iron Flap gate.

Features and Benifits · Easy to install - No grouting required. · Light weight due to to the use of HDPE. · Virtually maintenance free. · Ultra Violet and impact resistant. · Standard sizes available for immediate dispatch. · Supplied complete with all seals and stainless steel fixings.

Specifications

Nominal diameter:	DN100mm to DN3000mm, other sizes available
Maximum working pressure:	25.0 meter water
Operating temperature:	<60 degrees centigrade
Opening angle	>90 degrees
Corrosion resistance	Yes
Applicable media	water, river water, seawater, living water, industrial sewage.

The flap gate valve plate and the back plate are produced using HDPE. The hinge pin and ballast weight are produced in SS304 as standard. The ballast weight can be easily adjusted if required. The sealing arrangement consists of an EPDM lip seal in the back plate. The valve plate is also installed on an angle in relation to the back plate to ensure a good seal.

Note:Usually the flange drilling standard is based on DIN PN6, other standards avaible as ANSI CLASS150/300, DIN PN16/25, JIS10 etc. For special application, please contact GYLDT for detailed design.

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