To check the device, first make sure that the tank is turned off and cool. All PRVs should be replaced if they are not functioning properly. During an inspection, the valve should be checked for proper operation, and the spring tension should be checked on spring-loaded valves. PRVs should be inspected at least once per year, and more often if they are used frequently. These valves use a diaphragm to open and close the valve, and are more sensitive to pressure changes. Diaphragm-operated PRVs are less common, but are often used on larger tanks. Spring-loaded PRVs are the most common, and consist of a spring-loaded valve that opens when pressure inside the tank reaches a certain level. There are two main types of PRVs: spring-loaded and diaphragm-operated. PRVs are designed to relieve pressure build-up inside a propane tank, and if they are not functioning properly, can lead to dangerous situations. If the valve shows decrease in pressure, there is a leak in the hose or fuel supply line.įorklift propane tank pressure relief valves (PRVs) are a critical safety component, and as such, should be regularly inspected. The general rule of thumb is if the valve opens even in normal temperature, it is a sign of blockage or the device is defective. Usually, at 100-100 psi can be considered normal, and the valve won’t open. In a very hot weather, if the temperature reaches above 200 degrees of greater, which is considered very high, the valve will open to release some gas. ![]() When the outside temperature rises the pressure also increases inside the tank. When operating in a normal 75 degrees, normally the pressure inside ranges between 135-145 psi. The would depend on the temperature where the forklift truck is operating in. ![]() The relief valve should be checked for leaks.Proper installation of the device is important.The relief valve should not be rusted and be kept in good condition.The valve should be inspected regularly.The pressure relief valve should be set to the correctly. ![]()
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