Pressure & Temp e ra t ure Re l i e f Val v e
PTR
PRESSURE & TEMPERATURE
RELIEF VALVE, PTR
The Pressure and Temperature Relief Valve (PTR) is
designed to relieve the increase in pressure caused by
water expansion during the normal heating cycle. The
valve will then relieve the increase in pressure by releasing
drips of hot water to the drain line. Should the electrical
temperature cut-out device cease to operate correctly, the
water will overheat. The temperature probe will then open
the PTR valve and discharge hot water to the drain line.
FEATURES
• Each valve is individually tested and
calibrated to ensure that it meets
the correct pressure specifications.
It is recommended that an ECV be fitted to the cold water
supply line. This will relieve cold water, not hot water,
during the heating cycle, saving energy and increasing the
life of the PTR. Some local governments make it mandatory
to install an ECV in the cold water line. PTR and ECV valves
are safety valves and should be replaced every 4 years.
• Designed and manufactured to meet
Australian Standard AS1357.1, under
Licence No. 2639 and meets AS4020,
Drinkable Water Standard.
• Manufactured under Quality
Assurance ISO 9001 and ISO 9002
(UK).
INLET PRESSURE CONTROL
• Suitable for either horizontal or
vertical installations.
TM
• The valve is designed to
automatically reseat after each
action.
WaterMark
AS
Lic 2639
2639
AS 1357.1
1357.2 Lic
SAI
SAI Global
PTR15 DIMENSIONS
INSULATION included
PTR15
1400
1000
850
700
High pressure may cause excessive discharge and possible
premature failure of the operating relief valve (see table).
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 water pressure
exceeds 80% of the nominal set pressure of the operating
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 PTR valve and
therefore will be the main operating relief valve.
15mm (1/2”) BSP
15mm (1/2”) BSP
15mm (1/2”) BSP
15mm (1/2”) BSP
Australian Valve Group Pty Ltd
Unit 2, 9-11 Noble St, Kewdale, WA, 6105
Tel: 1800 AVG AUS (284 287)
Fax: (08) 9353 2689
www.avg.net.au
www.avg.net.au
PTR
PTR SPECIFICATIONS
MODEL DN SIZE COLOUR PRESSURE
INLET
OUTLET
CODE RATING
EXPANSION
RATINGS
PTR15/1400
15
RED
1400kPa
1/2” male
1/2” female
10 KW
PTR15/1000
15
GREEN
1000kPa
1/2” male
1/2” female
10 KW
PTR15/850
15
BLUE
850kPa
1/2” male
1/2” female
10 KW
PTR15/700
15
BLACK
700kPa
1/2” male
1/2” female
10 KW
PTR20/1000
20
BLACK
1000kPa
3/4” male
3/4” female
46 KW
PTR20/850
20
BLUE
850kPa
3/4” male
3/4” female
46 KW
PTR20/700
20
BLACK
700kPa
3/4” male
3/4” female
46 KW
1. Stainless Steel
Lever action
RATING PLATE COLOURS
6. The valve is a dry
spring design. It has
a high temperature
silicon boot that shields
the spring from any
corrosive elements
in the water supply,
that may build up and
prevent the valve from
relieving.
The valve rating plates are colour coded to make selecting
the correct valve easy. Simply match the PTR valve to an
ECV with a rating plate of the same colour
COLOUR
RATING PLATE
ECV
VALVES
PTR
VALVES
Black
Black
Blue
Blue
Green
Green
Green
Red
Red
ECV 15/600
ECV 20/600
ECV 15/700
ECV 20/700
ECV 15/850
PTR 15/700
2. Should the main
relief valve become
blocked, this auxiliary
will blow out and
relieve the valve.
PTR 20/700
PTR 15/850
PTRE 20/850
PTR 15/1000
3. The valve has a high
temperature seal that
remains flexible and
continues to perform
at temperatures that
cause most organic
elastomers to become
brittle and crack.
PTRE 15/1000
ECV 20/850
ECV 15/1200
PTR 20/1000
ECV 15/1200
ECV 20/1200
ECV 15/1400
PTR 15/1400-HTT
PTR 15/1400
PTRE 15/1400
Red
Red
Orange
WITHOUT ECV
PTR Valve
Setting
kPa
PLV required if
mains pressure
exceeds:
700
680
WITH ECV
PLV
Setting
kPa
ECV
Setting
kPa
500
700
PLV required if
mains pressure
exceeds:
550
PLV
Setting
kPa
350
850
680
500
700
550
350
1000
800
600
850
680
500
1400
1120
600
1200
960
600
www.avg.net.au
4. Polyethylene plastic
sheath to protect the
probe from corrosive
elements in the water.
7. Colour coded valve rating
plate for ease of identification
SET PRESSURES FOR WATER HEATER VALVES
5. Forged DR brass body.
P re ss u re & Temp e ra t ure Re l i e f Va l v e
PTR20
PTRE15
1000 20mm (3/4”) BSP
850 20mm (3/4”) BSP
PTR20 DIMENSIONS
1400
1000
PTR15/1400HTT
15mm (1/2”) BSP
25mm Extended Body
15mm (1/2”) BSP
25mm Extended Body
PTRE15 DIMENSIONS
PTR15/1400HTT
DIMENSIONS
www.avg.net.au
Pres sure & Temp era t ure Re l i e f Va l v e
INSTALLATION
Flush out your lines to remove any debris or dirt
particles that may cause the valve to malfunction.
If the valve probe is damaged in any way DO NOT
install the valve. Return it to your valve supplier and
obtain a replacement. Clean out any foreign matter
from the threaded inlet water connection to the water
heater.
In addition to these instructions, PTR Valves must be
installed in accordance with AS/NZS3500 National Plumbing
and Drainage Code. All local government requirements must
be met and the PTR must be installed in line with the water
heater manufacturer’s instructions. Valve rated to 10Kw.
The PTR valve to be fitted must comply with the water
heater manufacturer’s rating label. The kw rating of the valve
should be greater than the kw rating of the water heater. All
this information is found on the rating plate of the valve, and
on the rating label on the side of the heater.
1. Apply thread seal tape to the thread. Be sure not to use
excessive amounts of thread seal that could hang over
the thread, break off and lodge under the valve seat,
causing it to leak.
The pressure & temperature relief valve must
be installed by a licensed plumber and in
accordance with AS/NZS 3500 building code
and relevant local requirements and the
following manufacturer’s instructions.
2. Screw the valve into the PTR socket. Do not use a wrench
on the valve body. Use the spanner flats provided.
3. No valve, taps, or other isolating valves are to be fitted
between the PTR and the water heater.
4. Install a drain line of the same nominal pipe size as the
valve, in accordance with AS/NZS3500.4. The drain line
must have a continuous fall.
5. Test the manual relief by lifting the lever. Water should
out of the relief valve. It is recommended that the manual
relief be operated every 6 months, so as to flush out any
deposits that may accumulate under the seal.
CAUTION: “Danger of scalding” This valve relieves hot
water.
TYPICAL CONTROLLED PRESSURE HOT WATER SYSTEM INSTALLATION
PTR
Relief Valve
Tempering
Valve
Caution: Water escaping from the drain
line may be hot and could cause scalding.
This valve is a Safety Valve. Excessive
discharge from the drain line or operation
of the small auxiliary relief valve opposite
the drain can mean a malfunction within
the system. Switch off the energy source
and call a plumber or service person.
Drain Line
Untempered hot water
(eg kitchen and laundry)
Controlled
Tempered water
(50°C to chosen
outlets, eg bathrooms)
pressure
storage
water heater
Drain Line
Mains Supply
Expansion
Control Valve
LEGEND
= Hot
= Cold
Pressure
Non-Return
Limiting Valve Isolating Valve
The tempering valve may be installed at the
point of use, but there must be a minimum
1 metre pipe run between the valve and the
outlet tap.
= Mix
Drain lines must have continuous fall.
WARRANTY: This valve is factory set and cannot be serviced or repaired in the field. The Australian Valve Group (AVG) will not honour any
warranty claim where these instructions have not been followed, or where thevalve has been tampered with or subjected to obvious abuse.
Australian Valve Group Pty Ltd
Unit 2, 9-11 Noble St, Kewdale, WA, 6105
Tel: 1800 AVG AUS (284 287)
Fax: (08) 9353 2689
www.avg.net.au
www.avg.net.au
DISCLAIMER: Every care has been taken in the preparation of these instructions, which have been issued as a guide only. Compliance with the requirements of local Authorities is required at all times. These requirements may change from time to time. Always be
aware of the local requirements. Subject to any statutory obligations and manufacturers warranties no liability can be accepted for any losses, consequential or otherwise which may arise or be said to have arisen from relying upon the contents of this installation
instruction as to the fitness of any particular product for any particular purpose, use or application. The Australian Valve Group Pty Ltd reserves the right to modify designs and specifications and to withdraw and introduce products at any time without notice.
Installation Instructions
PTR