Aluminium Dual Plate Wafer Check Valve Manufacturer  in Africa

Compact pump discharge lines often need a check valve that closes faster than a conventional swing-disc design. An Aluminium Dual Plate Wafer Check Valve uses two lightweight plates mounted around a central hinge and fits between the mating pipe flanges without a full flanged body. In marine specifications, the pressure-containing material may be an aluminium-bronze casting rather than general-purpose structural aluminium, so the exact alloy grade must be stated. African Valve is a prominent Aluminium Dual Plate Wafer Check Valve Manufacturer  in Africa, serving Nigeria, Egypt, South Africa, Kenya and Ghana and supplying marine and industrial projects in the Middle East, Europe and other international markets.

How Do the Plates Limit Reverse Flow?

Forward flow rotates the two semicircular plates away from the seat and compresses the torsion springs. As velocity falls, spring force begins returning the plates before a large reverse flow develops.

Each plate has less mass and a shorter travel distance than a single swing disc. This reduces closing inertia and can lower the impact associated with check-valve slam. The design is therefore considered for pump systems where rapid flow reversal could create damaging pressure surges.

Spring torque must suit the hydraulic duty. Excessive spring force increases cracking pressure and pressure loss, while insufficient force can delay closure. Correct sizing should be based on actual flow velocity rather than pipe size alone.

What Does the Wafer Body Change?

The body is positioned between two flanges and retained by through-bolts. This produces a short installation length and lower weight than a flanged swing check valve.

Because the body depends on the connected flanges for retention, the pipework must be properly aligned and supported. The valve should not be used to pull distorted flanges together. Gaskets and flange bores also need enough clearance for unrestricted plate movement.

Horizontal installation is common. Vertical upward flow may be acceptable when the spring and hinge arrangement has been reviewed for that orientation. The body flow arrow must always follow the intended forward-flow direction.