temperature and pressure vacuum relief valve

vacuum relief valve 1.Cast DR brass body 2.Easy to operate flushing mechanism 3.An integral auxiliary relief 4.Factory

vacuum relief valve

FeaturesPrevents damage to hot water systems by relieving excess pressure and temperatureCast DR brass bodyStainless steel valve seatEasy to operate flushing mechanismAn integral auxiliary relief and vacuum valveNon-serviceable and non-adjustableDry spring constructionStainless steel springColour identification – PTR1000 (green disc)Complies with AS1357.1StandardsMark Certification

Connections

Inlets:	15mm (1/2" BSPT) Tapered Male Thread
Outlet:	15mm (1/2" BSP) Female Thread
Length:	100mm
Height:	36mm

Pressure

Factory Set:	1000kPa
Auxiliary Relief Valve Pressure:	500 - 935kPa
Rated Capacity:	10kW

Temperature

Maximum opening Temperature: 99°C

Standards

 Conforms to these standards: AS1357.1

 Use:T&P Valve for solar water heater, electric heater and so on

T&P relief Valve Function:

The T&P valve is designed to relieve the increase in pressure which develops during the normal heating cycle.

This is caused by the water expanding during the heating cycle.The T/P valve then will relieve the increase in pressure by releasing drips of hot water to the drain line. It is recommended that an expansion control valve be fitted to the cold water supply line as it will relieve cold water(not hot water),during the heating cycle expansion,thereby saving energy and increasing the life of the T&P relief valve.Local regulations may make it mandatory to install an expansion control valve in the cold water supply line.

Should the electrical temperature cut-out devices cease to operate correctly,the water will overheat and the temperature probe will then be activated to open the P/T valve,discharging hot water.

T/P relief valve for solar water heater

Inlet pressure control:

High pressure may cause excessive discharge and possible premature failure of the operating relief valve.The maximum water pressure usually occurs during the night, at the time of lowest water usage. In any mains pressure water heater installation,if the inlet water pressure exceeds 80% of the nominal set pressure of the operation relief valve,a pressure limiting valve must be fitted to the cold inlet.(If a cold water expansion control valve is fitted it will have a lower set pressure than the T/P relief valve and thus be classed as the "operating"relief valve.)

T&P Valve Installation:

T/P Valves should be installed by a licensed plumber.

If the temperature probe protruding from inside the inlet thread is damaged or bent,do not install,and obtain a replacement valve.

Clean out all deposits from the threaded boss on the heater before fitting a replacement valve,otherwise the new valve risks contamination and premature failure.Apply PTFE thread tape to the male taper thread,making sure that the tape does not hang over the outer end of the thread,as this can lead to premature valve failure.Screw the valve into the heater socket.Do not use a wrench on the valve body.Use teh hexagonal spanner flats provided.No valves,taps,or other isolating devices are to be fitted between the P&T relief valve and the water heater.

Install a drain line of the same nominal size as the valve,in accordance with AS3500.4.(The drain line must have a continuous fall.) 

item NO.	pressure set	temperature
T61T1 1/2''	5BAR/7BAR	90/99degree Celsius
T61T1 3/4''	5BAR/7BAR	90/99degree Celsius

temperature and pressure vacuum relief valve