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Nozzle Check Valves

The world leader in Air Valves Techonology


NCV Resized

Vent-O-Mat Series NCV : Nozzle Check Valve

The Vent-O-Mat Nozzle Check Valve (NCV) is a low headloss, quick closing, non-slam check valve .

Many pipeline engineers  and end users   think that a check valve is a simple device  with a simple function,  to prevent flow  reversal.  However many pipeline problems can be caused by the incorrect selection and inattention to the chosen check valve design and how it will function within the chosen application.

Problems caused by incorrect selection can include:

  • Surge and water hammer
  • Check valve slam
  • Check valve flutter
  • High energy costs
  • Additional unaccounted for resistance in the pipeline

The Vent-O-Mat NCV offers a solution to these  problems in a valve that needs no modifications, dampeners or hydraulic devices to achieve these solutions

Offering the following features 

  •    Non-slam closure – the valve responds rapidly to changes in velocity that the disc is at the point of closure before reverse flow occurs
  • Low pressure loss – in the open position the annular disc forms two flow paths which increases the volume of flow through the valve
  • Short closure time – the short stroke length reduces closure time
  • Friction free opening and closing – helical springs and radial guides allow the disc to move from the open to closed position with limited resistance
  • Tight shut off – achieved by metal – to – metal sealing
  • No scheduled maintenance