Blow down valve is a valve that removes part of the water in the boiler that has a high concentration, and replaces it with new boiler feed water so that it will reduce the concentration of suspended or dissolved solid water in the boiler.
When in the open position, the blowdown valves are utilized. The blowdown valve’s primary job is to regulate a steady stream of fluid or steam under high differential pressure. This type of valve’s ability to maintain fluid tightness and ease of operation without the need for any wedging movement is its most notable characteristic.
When the intermittent blowdown valve is opened, the large cross-sectional area of the orifice creates a suction effect, which produces a short-term high flow of water that will remove the silt and sediment deposits. The PA type valve is intended for manual operation. For the blowdown process.
the valve is fully opened by hand using a lever for about two to three seconds. The spring-loaded valve cone is forced out of the valve seat. As a result, the accumulated silt and sediment deposits flow out of the open valve.
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