Dixon Heavy duty flexible roll grooved coupling, 3" (80mm)

This Dixon heavy duty flexible coupling joins two roll grooved pipe ends and allows some movement at the joint. Its ribbed housing is ductile iron to ASTM A536 with a hot dip galvanised finish (AS4680), and the standard gasket is black EPDM. The 80, 100 and 150 NB sizes are rated at 1,000 PSI, the 200 NB size at 800 PSI and the 250 and 300 NB sizes at 500 PSI, with an operating temperature of -30 to 110°C.

The coupling is UL listed and FM approved and as comparable to Victaulic No. 77.

Where this product is used

• Fire sprinkler and hydrant systems, and hot and potable water lines, where a flexible coupling is wanted
• Pipe runs that expand, contract, settle or vibrate, because flexible couplings allow controlled angular, linear and rotational movement at each joint

Features

• Ribbed, heavy duty construction for working pressures up to 1,000 PSI
• Housing: ductile iron (ASTM A536) with hot dip galvanised finish (AS4680)
• Standard gasket: EPDM, black, temperature -30 to 110°C
• The range is UL listed and FM approved
• Not for hydrocarbons such as petroleum, kerosene and diesel with the standard EPDM gasket

Key specifications

Choosing the right option

Choose a flexible coupling where the line needs to move; choose a rigid coupling where the line must stay stiff, such as long straight runs that carry torsional or bending loads. Match the pipe OD exactly, and match the gasket to the fluid: EPDM suits water, and Dixon also offers a nitrile gasket for petroleum products (-31 to 80°C, not for hot water).

The rating drops as the size rises, from 1,000 PSI up to 150 NB to 500 PSI at 250 and 300 NB, so check the figure for your size before you specify the coupling.

Related Dixon couplings and gaskets: Dixon Roll Grooved Rigid Coupling - Galvanised, Dixon 165.1 x 168.3mm Roll Grooved Rigid Transition Coupling - Galvanised and Dixon EPDM Gasket For Roll Grooved Coupling.