Inverted bucket flange drain valve is a commonly used valve in steam systems, which can effectively remove condensed water from steam while preventing steam leakage. The internal structure of this type of drain valve includes an inverted bucket as a liquid level sensitive element, with the opening of the inverted bucket facing downwards and connected through a lever system to drive the valve core to open and close. The design of the inverted bucket drain valve enables it to resist water hammer, has good anti pollution performance, and can continuously discharge non condensable gases. In addition, its valve seat is protected by a water seal, which ensures no active steam leakage during operation and has a good energy-saving effect.
working principle
The working principle of the inverted bucket drain valve is based on the density difference between condensed water and steam. When the system is started, the air and low-temperature condensed water in the pipeline enter the drain valve, and the inverted bucket falls by its own weight. The valve is opened by the lever system to quickly discharge the air and low-temperature condensed water. As steam enters the inverted bucket, the buoyancy generated causes the bucket to rise and close the valve through the lever system. The small holes on the inverted bucket can automatically exhaust air. When a portion of the steam is discharged from the small holes, the remaining steam cools and forms condensed water, causing the inverted bucket to lose buoyancy and fall again. Open the valve and discharge the condensed water. This process is repeated to achieve intermittent drainage.
Inverted bucket drain valves can be used in conjunction with many valves to achieve precise control and safe operation in steam systems. For example, a globe valve can shut off steam flow during maintenance, while a check valve can prevent damage caused by steam backflow. Ball valve and butterfly valve are commonly used to regulate steam flow to meet different process requirements. Gate valves are suitable for handling steam containing larger solid particles. When designing and installing steam systems, appropriate valve combinations should be selected based on specific application scenarios and operational requirements.