Structural principle of bimetallic steam trap

Structural Principle

The main component of a bimetallic sheet steam trap is a bimetallic sheet temperature sensing element, which deforms due to heating as the steam temperature rises and falls, pushing the valve core to open and close the valve. The bimetallic sheet type drain valve is equipped with adjustment bolts that can adjust the operating temperature according to needs. Generally, the adjustment range of undercooling is lower than the saturation temperature of 15 ℃ -30 ℃, and the back pressure rate is greater than 70%. It can discharge non condensable gases, is not afraid of freezing, has a small volume, is resistant to water hammer and high pressure, and can be installed in any position. The bimetallic sheet has fatigue and requires frequent adjustment.

 

Working Principle

When the device first starts, low-temperature condensation water appears in the pipeline, the bimetallic sheet is flat, and the valve core is in the open position under the spring force. As the temperature of the condensate gradually increases, the bimetallic temperature sensing element begins to bend and deform, pushing the valve core towards the closed position. Before the condensate reaches saturation temperature, the drain valve begins to close. The bimetallic sheet controls the valve opening and closing with changes in steam temperature, preventing steam and draining water.