Flap valve

made of stainless steel or steel

Flap valve

Flap valve DN 600

Flap valve DN 1200

Flap valve DN 1200 with counterweight

Flap valve open

Flap valve DN 1400 with shock absorber

Flap valve in operation

Rectangular flap valve

Rectangular flap valve - Lee Tunnel London

Flap valve for drainage and flood protection

Lifting device for flap valves

Flap valve
made of stainless steel or steel

For use at the outlet of a drainage system as a backflow preventer and in flood protection. When the water level rises, backflow is prevented by automatic closing of the cover. Different cover variants allow use for a wide range of requirements. With circular or rectangular opening.

More details

Data sheet Tender text

Details

Opening dimensions and pressure level

DN 100 - 2000
Dimension 150 × 150 mm up to 3000 × 300 mm
Selectable pressure level on the front: 2-10 mwc

Flap

Straight flap lid (standard) reinforced by sheet metal ribs according to static requirements
All welded stainless steel parts with perfect corrosion protection from our own pickling plant
Steel parts coated 320 µm
Replaceable wearing parts and seal (EPDM/NBR)

Materials

Stainless steel 1.4301 (304) / 1.4404 (316L) / 1.4410 (507) / 1.4462 (318LN)
Steel A36 coated 320 µm

Tightness class

Leakage rate to DIN 19569, Part 4, Table 1: Pressure at front: 0.05 to 0.1 l · s^-1 · m^-1(tightness class 3)
Pressure-tight from 1.5 times DN

Mounting options

Anchoring into the structure
Casting in concrete
Mounted on a pipe flange with hole pattern PN10
Optional: Other hole pattern possible

Scope of supply

Flap valve complete with all required fastening elements (anchor and sealing material)

Variants

Flat valve at the outside water level below the pipe base
Flat valve with counterweight at low drainage pressure
Flap valve with counterweight
Sloping cover
With shock absorption
Hollow flap for (continuous) closing pressure adjustment
Flap valve with damping unit for installation in pump pressure lines

Individual sizes are available on request.

YOUR ADVANTAGES

VERSATILE

Soft-sealing backflow flap as a backflow preventer, for drainage and flood protection

INDIVIDUAL

Each flap valve is available with different cover designs

FACTORY CERTIFICATE

On request, supplied with a factory certificate in accordance with DIN EN 10204, 2.1, including specification of the leakage rate according to DIN 19569, Part 4

PERFECT CORROSION PROTECTION

All welded stainless steel parts from our own pickling plant

We will be pleased to consult you.

Contact

Flap valve
made of stainless steel or steel

Flap valve
made of stainless steel or steel