A purge valve is a vital part of any gas system and should be tested regularly to ensure proper operation. However, many property owners don’t have access to a vacuum pump, which can make testing difficult and time-consuming. This blog post will show you how to test a purge valve without a vacuum pump, making it easier for you to maintain your gas system properly. By following these simple steps, you can avoid costly repairs or replacements down the road.
What is a purge valve?
Purge valves are devices used to control the flow of gas or fluid through a system. They are often found on HVAC systems, where they help to prevent backdrafting and vacuum buildup. These valves are normally closed by a spring when the pressure inside the system is greater than the atmospheric pressure outside. When it is desired to release a certain amount of gas or fluid, the valve can be opened by turning a knob or pressing a button.
How do purge valves work?
Purge valves work by restricting the flow of air or other gases through a vessel by closing off one or more ports. The port closures can be adjusted to create suction (or vacuum) at different points in the vessel, which draws contaminants and other gas-borne particles to the valve’s relief vent where they are released into the atmosphere.
How to test purge valve without vacuum pump
Purge valves are used on vacuum systems to purge air from the system. To test a purge valve, one can use a manual pump to evacuate the system and then check for leaks using a pressure gauge. When evacuating the system, be sure to maintain vacuum to avoid creating pressure in the lines leading to the purge valve.
Conclusion
If you are looking to replace your purge valve without having to resort to using a vacuum pump, then follow these simple steps: Turn off the water supply and drain the tank. Open the purge valve by removing the cap and turning it counter-clockwise (the direction of flow). If there is no water or air flowing through the valve when you turn it, you have an obstruction and will need to replace the valve.