DNS Double Hinge Flap Valve
Spec Sheet: DNS Double Hinge Flap Valve
DNS Double Hinge Flap Valve – Ductile Iron – DN80 to DN600
A metal-seated double-hinge flap valve with a circular aperture that prevents reverse flow in outfall applications such as rivers, surface / storm water and treatment works.
Description
DNS Double Hinge Flap Valve
The DNS Double Hinge Flap Valve is a metal-seated flap valve with a circular aperture designed to prevent reverse flow in outfall applications. It is typically used on river, surface / storm water and treatment-works discharges, where its lightweight ductile-iron construction and double-hinge action provide reliable, low-maintenance non-return protection.
Features:
• Unique lightweight ductile iron design.
• Double hinge for optimal sealing.
• Durable blue fusion-bonded epoxy coating.
• Anti-tamper stainless steel hinge pins.
• Bush hinge links for smooth operation.
• Corrosion-resistant construction.
• Lifting eye as standard.
• Drilled to suit flange & wall mounting.
General Application:
Outfall protection against reverse flow on river, surface-water, storm-water and treatment-works discharges.
Specifications
| Type | Metal-seated double-hinge flap (non-return) valve |
|---|---|
| Size Range | DN80 to DN600 (larger sizes on request) |
| Flanges & Drillings | BS EN 1092-2 1987 Table 9 (PN16) |
| Maximum Working Pressure | 6.0 metres static on-seat head |
| Working Temperature | Ambient / water service |
| Suitable Media | Surface water, storm water, treated effluent |
| Coating | Blue fusion-bonded epoxy |
| Materials | Ductile iron door/frame/hinge (BS EN 1563 Gr 500/7); copper-alloy seat; stainless steel hinge pins |
| Note | Circular aperture outfall flap; anti-tamper SS hinge pins; lifting eye as standard |