Product Information

Operation:

• The NEFA NRI valve performs two functions; an isolation valve and a non-return valve. 
• The isolation valve is fully open in the normal operating position.
• When isolation is required the NRI’s spindle is screwed down, bringing the washer into contact with the valve seat to shut off the flow.
• When water flows in the normal direction, the jumper valve is pushed off the valve seat, allowing water flow.
• When flow stops, the spring pushes the jumper back on to the valve seat.
• When back flow pressure forces the washer against the valve seat, it creates a seal and thus prevents back flow.

Installation:

• NEFA valves should always be installed by a licensed plumber in accordance with National Plumbing and Drainage Code AS/NZ3500.4.
• The installation must also comply with any Local Authority requirements and the water heater manufacturer’s requirements.
• It is suitable for horizontal or vertical installation. 
• Install with the direction of flow inline with the arrow on the valve body.
• Installation at the inlet to a hot water cylinder is the minimum requirement for AS/NZS 3500.5  
• It must be installed where it can be easily accessed.
• Ensure that sealing materials, e.g. thread tape or thread sealing paste, do not intrude into flow passages as this could cause obstruction to flow and failure of the valve.
• The NRI must not be installed in the ground or in a situation where it could be subject to freezing.
• Never expose the NRI to a torch-flame or heat. Heat will destroy the seals and sealing parts.

REFER TO TECHNICAL DRAWINGS AND IMAGES FOR TYPICAL INSTALLATION DIAGRAMS.

Specifications

Inlets:	20mm (3/4" BSP) Female Flared Thread
Outlet:	20mm (3/4" BSP) Female Flared Thread
Length:	80mm
Height:	52mm

Maximum pressure	2000kPa
Maximum temperature	80°C
Flow rate:	0.09/litres / sec
Pressure differential:	10kW

Conforms to these standards: AS1357.1 AS1357.2

Servicing

This valve is not serviceable.

Technical Drawings & Images