Working principle and purpose of the product:

The internal structure of the liquid expansion type drain valve is mainly composed of a stainless steel bellows as the main operating element, filled with a liquid with a vaporization temperature lower than the saturation temperature of water. When the device is started, cooling condensate appears in the pipeline, and the liquid inside the corrugated pipe is in a condensed state. The valve core is in the open position under the elastic force of the spring. As the temperature of the condensed water gradually increases, the liquid inside the corrugated tube begins to evaporate and expand, causing an increase in internal pressure, deformation, and elongation, which drives the valve core to move towards the closing direction. Before the condensed water reaches saturation temperature, the drain valve is completely closed. There is always high-temperature condensed water in front of the valve, with no steam leakage and good energy-saving effect.

Product Structure Features:

1. Stainless steel corrugated tube is sturdy and durable, with a long service life.

2. The discharge temperature of condensed water can be adjusted, utilizing sensible heat and achieving good energy-saving effects.

3. There is always condensed water in front of the valve, forming a reliable water seal without steam leakage.

4. Liquid expansion type drain valves are not affected by vibration, steam pressure fluctuations, and water hammer.

5. The liquid expansion type drain valve can be installed at any angle, without being limited by installation orientation, and has excellent air discharge performance.

6. The liquid expansion type drain valve has a simple structure and is equipped with a filtering device, making it easy to install and maintain.