{"product_id":"avg-ptr25-850-lf-25mm-850kpa-commercial-ptr-pressure-temperature-relief-valve","title":"AVG PTR25-850-LF 25mm 850kPa Commercial PTR Pressure Temperature Relief Valve","description":"\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003c\/span\u003e \u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eAustralian Valve Group (AVG) PTR25-850-LF 25mm (1\") 850kPa 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.  \u003c\/p\u003e\n\u003cdiv\u003ePressure 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. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eDuring 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. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eWhen 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. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eWhen 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. \u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003ch4\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eTechnical Details\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Australian Valve Group (AVG)\u003c\/li\u003e\n\u003cli\u003eModel: PTR25-850-LF\u003c\/li\u003e\n\u003cli\u003eWatermark License Number: 2639\u003c\/li\u003e\n\u003cli\u003eExpansion Rating: 132kW \u003c\/li\u003e\n\u003cli\u003ePressure Rating: 850 kPa\u003c\/li\u003e\n\u003cli\u003eTemperature Rating: 99°C\u003c\/li\u003e\n\u003cli\u003eThread Size: 1\" BSP (25mm) Male MI thread and female FI thread\u003c\/li\u003e\n\u003cli\u003eThread Size Physical Measurements: 33.249mm external male and internal female thread diameter (refer to the BSP sizing chart in the photo gallery)\u003c\/li\u003e\n\u003cli\u003eInsulation Jacket Included \u003c\/li\u003e\n\u003cli\u003eMaterial: DR Brass Body; Stainless Steel Pressure Spring; Copper\/Stainless Steel Element; Silicon Seals.\u003c\/li\u003e\n\u003cli\u003eIntended Use: For commercial hot water service applications where high Kilowatt rating is required for the PTR valves.\u003c\/li\u003e\n\u003cli\u003eSKU: AVG-PTR25-850-LF\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003ePackage Contents\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAVG PTR25-850-LF kPa PTR Valve 25mm (1\") 850kPa \u003c\/li\u003e\n\u003cli\u003ePackage Weight: 900g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cb\u003e\u003cu\u003e\u003cspan style=\"font-size: large;\" size=\"4\"\u003e\u003c\/span\u003e\u003c\/u\u003e\u003c\/b\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"AVG","offers":[{"title":"Default Title","offer_id":43365963333800,"sku":"AVG-PTR25-850-LF","price":255.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0517\/2507\/4600\/files\/Image_20250724105701.jpg?v=1753320091","url":"https:\/\/allplumbingonline.com.au\/products\/avg-ptr25-850-lf-25mm-850kpa-commercial-ptr-pressure-temperature-relief-valve","provider":"All Plumbing Online","version":"1.0","type":"link"}