When the equipment is just started, the air and low-temperature condensed water in the pipeline enter the drain valve through the launching pipe. The bimetallic sheet emptying element in the valve pops the ball barrel open, the valve opens, and the air and low-temperature condensed water are discharged quickly. When the steam enters the ball barrel, the ball barrel generates upward buoyancy, the temperature in the valve rises, the bimetallic sheet emptying element shortens, the ball poke floats to the valve port, and the valve is closed. When the steam in the ball barrel becomes condensed water, the ball barrel loses buoyancy and sinks down, the valve opens and the condensed water is discharged quickly. When the steam enters the ball barrel again, the valve will be closed again for continuous and continuous operation.

杠桿浮球式疏水閥基本特色與自在浮球式相同，內部結構是浮球銜接杠桿帶動閥心，隨凝聚水的液位升降進行開關閥門。杠桿浮球式疏水閥運用雙閥座增加凝聚水排量，可到達體積小排量大，大疏水量達100噸/小時，是大型加熱設備理想的疏水閥。4.倒吊桶式疏水閥：

The basic characteristics of the lever floating ball trap are the same as the free floating ball trap. The internal structure is that the floating ball connects the lever to drive the valve core, and the valve is opened and closed with the rise and fall of the liquid level of condensed water. The lever floating ball drain valve uses double valve seats to increase the condensed water displacement, which can achieve small volume, large displacement and large drainage capacity of 100 tons / hour. It is an ideal drain valve for large heating equipment. 4. Inverted bucket drain valve:

當設備剛發動時，管道內的空氣和低溫凝聚水進入疏水閥內，倒吊桶靠本身分量下墜，倒吊桶銜接杠桿帶動閥心敞開閥門，空氣和低溫凝聚水敏捷排出。當蒸汽進入倒吊桶內，倒吊桶的蒸汽發生向上浮力，倒吊桶上升銜接杠桿帶動閥心封閉閥門。倒吊桶上開有一小孔，當一部份蒸汽從小孔排出，另一部份蒸汽發生凝聚水，倒吊桶失掉浮力，靠本身分量向下沉，倒吊桶銜接杠桿帶動閥心敞開閥門，循環作業，接連排水。

When the equipment is just started, the air and low-temperature condensed water in the pipeline enter the trap, the inverted bucket falls by its own weight, the inverted bucket connecting lever drives the valve core to open the valve, and the air and low-temperature condensed water are discharged quickly. When the steam enters the inverted bucket, the steam of the inverted bucket generates upward buoyancy, and the inverted bucket rises and the connecting lever drives the valve core to close the valve. A small hole is opened on the inverted bucket. When part of the steam is discharged from the small hole and the other part of the steam generates condensed water, the inverted bucket loses its buoyancy and sinks by its own weight. The inverted bucket is connected with the lever to drive the valve core to open the valve for cyclic operation and continuous drainage.

組合式過熱蒸汽疏水閥有兩個阻隔的閥腔，由兩根不銹鋼管連通上下閥腔，它是由浮球式和倒吊桶式疏水閥的組合，該閥結構先進合理，在過熱、高壓、小負荷的作業狀況下，可以及時地排放過熱蒸汽消失時構成的凝聚水，有用地阻撓過熱蒸汽走漏，作業質量高。高答應溫度為600℃，閥體為全不銹鋼，閥座為硬質合金鋼，運用壽命長，是過熱蒸汽專用疏水閥，填補了國內空白。

The combined superheated steam trap has two blocked valve cavities, and the upper and lower valve cavities are connected by two stainless steel pipes. It is a combination of floating ball type and inverted bucket type trap. The structure of the valve is advanced and reasonable. Under the operation conditions of overheating, high pressure and small load, it can timely discharge the condensed water formed when the superheated steam disappears, effectively prevent the leakage of superheated steam, and the operation quality is high. The high allowable temperature is 600 ℃, the valve body is all stainless steel, the valve seat is hard alloy steel, and the service life is long. It is a special steam trap for superheated steam, which fills the gap in China.