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Description
AVG PTR25-400-LF 25mm 400kPa Commercial PTR Pressure Temperature Relief ValveOverview Australian Valve Group (AVG) PTR25 400 LF 25mm (1") 400kPa PTR Pressure and Temperature Relief Valve (also known as TPR valve) is Australian Watermark approved and intended for commercial hot water service applications, with a high kilowatt rating of 132kW. Pressure and temperature relief valves, known PTR valves are critical mechanical safety devices for all hot water services. The temperature sensing probe monitors the hot water service's
Overview
Australian Valve Group (AVG) PTR25-400-LF 25mm (1") 400kPa PTR Pressure and Temperature Relief Valve (also known as TPR valve) is Australian Watermark approved and intended for commercial hot water service applications, with a high kilowatt rating of 132kW.
Pressure and temperature relief valves, known PTR valves are critical mechanical safety devices for all hot water services. The temperature sensing probe monitors the hot water service's temperatures. AVG PTR valve temperature probe is covered in a Teflon wrap to prevent any calcification build up overtime and to ensure long term accuracy. Inside the AVG PTR valve body, there is a piston mechanism that opens according to the pressure inside the water tank.
During the operation of the hot water services, the volume of the water will expand during heating cycles, as cold water heats up. This increased pressure can be dangerous if not regulated. The PTR valve regulates the pressure slowly dripping the water out of the tank in a controlled manner, usually via a discharge pipe into a drain or ground. Therefore, when the slow dripping is observed, it is just a perfectly normal PTR valve operation.
When there is a malfunction with the heating component or the thermostat in a hot water service, an uncontrolled heating can be extremely dangerous and explosions can occur catastrophically. PTR valve can detect this when the temperature and pressure exceed 99 deg or its preset pressure ratings. In this case, PTR valve will fully open and dump hundreds of liters of water to relieve the water heater tanks. The Kilowatt rating of the PTR valve refers to the rate that the PTR valve can dissipate this energy and this is regulated by Watermark and plumbing codes in Australia.
When a high kilowatt PTR valve rating is required in a commercial installation, a smaller sized 15mm or 20mm PTR valve must not be used as a cost cutting method for safety reasons.
Technical Details
- Brand: Australian Valve Group (AVG)
- Model: PTR25-400-LF
- Watermark License Number: 2639
- Expansion Rating: 132kW
- Pressure Rating: 400 kPa
- Temperature Rating: 99°C
- Thread Size: 1" BSP (25mm) Male MI thread and female FI thread
- Thread Size Physical Measurements: 33.249mm external male and internal female thread diameter (refer to the BSP sizing chart in the photo gallery)
- Insulation Jacket Included
- Material: DR Brass Body; Stainless Steel Pressure Spring; Copper/Stainless Steel Element; Silicon Seals.
- Intended Use: For commercial hot water service applications where high Kilowatt rating is required for the PTR valves.
- SKU: AVG-PTR25-400-LF
Package Contents
- AVG PTR25-400-LF PTR Valve 25mm (1") 400kPa
- Package Weight: 900g
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Product Reviews
★★★★★ 5
Extremely effective product
Such a great product. Really works well on chapped, dry hands during winter or to maintain healthy skin in other conditions. There really isn't a scent, it smells kind of plastic-y but that's fine with me when the results are so good. Hard to find in my area, so happy Amazon carries this brand.
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Reviewed in the United States on March 17, 2025
★★★★★ 5
Just what I was looking for!!
So far,so good. It s the first time I have been trying this product. I really like it. I was looking for something to help me for dryness due to the cold weather and excess of hand washing because of my job. I work in a microbiology lab, so I am costantly washing my hands and they tent to get dry with the specific soap we have to use. I like to feel my hands humected but not sticky. I tried several brands but never got quite convinced to by a brand again because I as not satisfied at all. This hand cream is ligher compared to many others but really protects and leaves your hands soft. You use it once or twice a day and they are still soft.
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Reviewed in the United States on March 4, 2018
★★★★★ 5
Cicalfate hand
Se absorbe súper bien y no te deja grasosa la piel
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Miracle cream!
This cream is unbelievable. goes in instantly, makes hands soft after one application and creates a barrier to protect your hands against cold and water. I live in VT and have tried numerous "extreme" hand creams that are heavy and greasy and useless~ this one is the best. I also like that it is fragrance-free except for that mild "Avene" spring water smell. I have two tubes, one for my night table and one next to the kitchen sink. I am 47 and have tried numerous face and body products`` you could say I used to be a "junkie" :) but I always come back to Avene. I have extremely sensitive skin and Avene products are a life saver.
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Reviewed in the United States on January 30, 2015
★★★★★ 4
Hydrating
Light weight
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Reviewed in the United States on March 16, 2026
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