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A POL valve (originally for Prest-O-Lite) … A POL valve (originally for Prest-O-Lite) is a gas connection fitting used on Liquefied petroleum gas (LPG) cylinders. The oldest standard for such connections, it was developed by the Prest-O-Lite company, hence the name. It is still the most common such fitting in some countries such as Australia. All 4.5 kg and 9 kg gas cylinders in Australia use a POL valve. There are an estimated 9 million 9 kg cylinders with the Type 21 (POL) valve and cylinder connection in circulation across Australia. In this market, the cylinders mostly supply gas to consumer owned barbecues and patio heaters. POL valves are legal and quite common in the United States, especially on larger containers, although certain uses (smaller portable containers) require a modified version of the POL valve that includes some safety features. In making the connection, a male connector is screwed into the Type 21 valve. The first male connectors relied on a metal to metal connection (brass on brass) with sufficient pressure applied via a hexagon nut to achieve an effective seal. The hexagon nut required a spanner to achieve sufficient pressure to obtain a gas tight seal. The notched hexagon nut denotes it is a left-hand thread. Following international convention, the standard changed to allow the use of an integrated hand wheel, with leak tightness being provided by an o-ring or rubber bull nose.provided by an o-ring or rubber bull nose.
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| rdfs:comment |
A POL valve (originally for Prest-O-Lite) … A POL valve (originally for Prest-O-Lite) is a gas connection fitting used on Liquefied petroleum gas (LPG) cylinders. The oldest standard for such connections, it was developed by the Prest-O-Lite company, hence the name. It is still the most common such fitting in some countries such as Australia. All 4.5 kg and 9 kg gas cylinders in Australia use a POL valve. There are an estimated 9 million 9 kg cylinders with the Type 21 (POL) valve and cylinder connection in circulation across Australia. In this market, the cylinders mostly supply gas to consumer owned barbecues and patio heaters.onsumer owned barbecues and patio heaters.
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| rdfs:label |
POL valve
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