Structural principle of thermodynamic steam trap

Structural Principle

There is a movable valve plate inside the thermal power type steam trap, which is both a sensitive component and an actuating component. According to the different thermodynamic principles of flow rate and volume changes when steam and condensate pass through, different pressure differences are generated between the valve plate and the valve plate, driving the valve plate to open and close the valve. The steam leakage rate is 3%, and the undercooling is between 8 ℃ and 15 ℃.

 

Working Principle

When the device starts, cooling condensate appears in the pipeline, and the condensate is quickly discharged by pushing open the valve plate under working pressure. When the condensate is discharged, the steam is then discharged. Due to the larger volume and flow rate of the steam compared to the condensate, there is a pressure difference between the upper and lower parts of the valve plate, and the valve plate quickly closes under the suction of the steam flow rate. When the valve disc is closed, it is subjected to pressure on both sides. The force area below the valve disc is smaller than the force area above. As the pressure inside the steam chamber of the drain valve comes from steam pressure, the force on the valve disc is greater than that on the bottom, and the valve disc is tightly closed. When the steam inside the steam trap chamber cools down to condensate, the pressure inside the chamber disappears. The condensate relies on the working pressure to push open the valve plate, and the condensate continues to discharge, circulating and intermittently draining.