HAWK PSM PVC SEWER PIPE

The locked-in joint

The Reiber forming process

The installers know how to appreciate pipe joints that can be trusted. Good prestressing and anchoring of the gasket achieved under controlled production conditions at the pipe factory, are prerequisites in the case of a “locked-in” joint. Such properties prevent sand or other impurities from penetrating into the sealing zone (i.e. between the gasket’s top and the circular groove in the socket), even by assembly under severe weather conditions.  Moveover, they preclude wrong placement of the sealing ring or dislocation of same.

A substantial compression of the rubber between the steel-ring and the groove wall is achieved during the blling operation.  Thus the Reiber process establishes the most crucial part of the sealing under controlled conditions in the factory. Conventional gaskets (with or without plastic rings or steel spirals) do not provide any active sealing effect until the gasket is compressed by the insertion of the spigot.

The truly locked-in gasket

The steel-reinforced Reiber ring is placed onto the mandrel and pushed to a position against a back-up collar.  The gasket is firmly anchored to the mandrel surface as the rubber between the mandrel and the steel-ring is compressed by approximately 20%. The hot pipe end is pushed over mandrel and gasket to form bell with locked in gasket.

Hawk Plastics
14447 Plant Rd.
Alpine AL, 35014

800-467-4295
Fax: 256-378-3079
 

Recyclable