01 Example of schematic diagram of working principle - mechanical type

Free Float Steam Traps

The free floating ball steam trap uses the principle of buoyancy. The floating ball moves up and down with the change of water level according to the amount of condensed water, automatically adjusts the opening of the valve seat hole, and continuously discharges condensed water. When the condensed water stops entering, the floating ball Drop to the bottom, return to the closed position, and the drainage stops. Since the seat hole of the drainage valve is always below the condensation water level, a water seal is formed, and the water and gas are naturally separated to achieve no steam leakage.

Inverted Bucket Traps

The inside of the inverted bucket trap is an inverted bucket as a liquid level sensitive part. The opening of the bucket is downward, and the lever connected to the inverted bucket drives the valve core to open and close the valve. The inverted bucket trap can discharge air, is not afraid of water hammer, and has good anti-fouling performance. The subcooling degree is small, the steam leakage rate is less than 3%, the maximum back pressure rate is 75%, there are many connecting parts, and the sensitivity is not as good as that of the free floating ball trap. Because the inverted bucket trap is closed by the upward buoyancy of steam, it is not suitable for use when the working pressure difference is less than 0.1MPA.

02 Schematic diagram of working principle - thermostatic type

Bimetallic Disc Steam Traps

The bimetal sheet trap is driven by a bimetal sheet temperature sensing element to switch the valve core. When the device is just started, low-temperature condensed water appears in the pipeline, the bimetal sheet is flat, and the valve core is in the open position under the elastic force of the spring. When the temperature of the condensed water gradually rises, the bimetal temperature sensing element begins to bend and deform, and pushes the valve core to the closed position. Before the condensate reaches saturation temperature, the trap is fully closed. There is always high-temperature condensed water in front of the valve, no steam leakage, and good energy-saving effect.

03 Schematic diagram of working principle - thermal power type

The thermodynamic trap is a very strong trap that works in a simple way. This trap operates by the dynamic action of flash steam passing through the trap. In the starting stage, due to the action of pressure, the disc is lifted up, and the condensed water and air pass through the inner valve seat and are discharged from the three small holes of the peripheral outlet through the lower part of the disc. There is a movable valve plate in the thermodynamic steam trap, which is both a sensitive part and an action actuator. According to the different thermodynamic principles of flow velocity and volume change when steam and condensed water pass through, different pressure differences are generated up and down the valve plate to drive the valve plate to open and close the valve.