Reliance High Pressure Expansion Non-Return Valve Unrestricted 15mm (1/2") - HPNR503

Model: HPNR503

Reliance High Pressure Expansion Non-Return Valve Unrestricted 15mm (1/2") - HPNR503

RMC's High Pressure Expansion Non-Return (HPNR) Valves are suitable for coil type heat exchange water heaters. The valve is a combination non-return and pressure relief device. The non-return prevents the backfl ow of hot water into the mains supply. The relief valve prevents an over-pressure condition within the coil.

High Pressure Expansion Non-Return Valves limit the maximum pressure in a system by relieving excess pressure to the drain line and are classifi ed as a functional control for this type of application. HPNR Valves should only be installed on the cold or inlet installation on a water heater as the valve is primarily intended to cope with the excess pressure generated during a normal heating cycle.

RMC's HPNR Valve range is available in a15 mm confi guration.

• Economical one-piece construction
  One valve meets the requirements of expansion and non-return valve for heat-exchange heaters
• Increased heating efficiency
  Expanded water is directed to the storage tank rather than dumped to waste
• Auxiliary pressure relief device
  Prevents pressure building up in the event of a blockage in the drain line
• Female BSP thread on outlet thread
  Prevents incorrect installation to the system
• Sealed spring cavity
  Prevents spring from seizing in the event of calcification
• Dezincification resistant
  Meets Australian Standard for potable water supply
• Suitable for horizontal or vertical installation
  Valve designed to work effectively in either orientation
• Individually tested and calibrated
  Every valve is tested to ensure higher quality and performance

RMC's HPNR Valve is suitable for installation in water heaters where the dual function of inlet pressure control and cold expansion relief is required (e.g. Coil type heat exchange mains pressure water heaters).