northvale korting - specialists in flow control equipment
Saturday 26th May 2018

Northvale Korting Ltd
2 Uxbridge Road
Leicester LE4 7ST

Tel: + 44 (0) 116 266 5911



The Norval check valve range is an industry standard for non-return valves. Most pipeline systems require some form of check valve device to maintain flow in one direction to prevent either contamination of liquids already in the system or damage to the pipework and its ancillary components. Quite a simple function you might think! Experience however tells us a different story.

What are the check valve features that the piping engineer is looking for?

  • Tight shut off under minimum back pressure.
  • Quick response to no-flow or reverse flow conditions.
  • Low resistance to forward flow.
  • Lightweight construction.
  • Ease of installation with unskilled operators .
  • No maintenance.
  • It is a stop silent valve.
  • It stops the reverse flow and is completely silent in its operation, preventing "water hammer".

The Norval Non-Return Check Valve has all these features plus one or two less obvious benefits.

  • It is extremely simple.
  • It operates in any direction, vertically up or down, or horizontal.
  • High material specification - 316 stainless steel.
  • Less noise due to slamming shut under reverse flow.
  • Can be incorporated in a variety of body configurations or simply built into original equipment as a cone and diaphragm assembly.

Norval Non-Return Check Valve Method of Operation

Flow takes place in the direction of the arrows under forward and reverse flow.

A - Check Valve Open

B - Check Valve Closed

C - Check Valve Diaphragm

D - Check Valve Cone

With flow in the forward direction the diaphragm deflects inwards (A) allowing easy passage of the liquid with little pressure loss. When a no flow, or back pressure, condition occurs the diaphragm returns to its relaxed position (B) sealing off all flow in the reverse direction.

This action is unaffected by the orientation of the Norval Non Return Check Valve.

Stop Silent is a registered trademark of Northvale Korting.

Products and Types

Check Valves
Anti-Slam Backflow Prevention
Diaphragm Valve
CIP Valve
Clean In Process
Large Size Check Valves
Foot Valve

Stainless Steel Check Valve
Marine Valve
Stop Silent
Wafer Check Valves
Compact Valves
Swing Check
Disc Type


Air conditioning
Chemical production plants
CIP (Clean in Process)
Cooling water systems
Filtration plants
Fire equipment
Food industry
Foot-operated valves
Ground water pumps
Heating systems

Irrigation plants
Petrochemical installations
Pneumatic systems
Pressure air installations
Pumping applications
Sanitary facilities
Ventilation systems
Washing machines
Water gauge installation
Water meters & flow meters
Water treatment

Product Range
Registered Office:
The Farm House, Vantage Business Park,
Bloxham Road, Banbury, Oxfordshire, OX16 9UX

Registered in England No. ­02091066
VAT Registration No. GB ­459 9212 13
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