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.

杠杆浮球式疏水阀基本特色与自在浮球式相同，内部结构是浮球衔接杠杆带动阀心，随凝聚水的液位升降进行开关阀门。杠杆浮球式疏水阀运用双阀座增加凝聚水排量，可到达体积小排量大，大疏水量达100吨/小时，是大型加热设备理想的疏水阀。4.倒吊桶式疏水阀：

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:

当设备刚发动时，管道内的空气和低温凝聚水进入疏水阀内，倒吊桶靠本身分量下坠，倒吊桶衔接杠杆带动阀心敞开阀门，空气和低温凝聚水敏捷排出。当蒸汽进入倒吊桶内，倒吊桶的蒸汽发生向上浮力，倒吊桶上升衔接杠杆带动阀心封闭阀门。倒吊桶上开有一小孔，当一部份蒸汽从小孔排出，另一部份蒸汽发生凝聚水，倒吊桶失掉浮力，靠本身分量向下沉，倒吊桶衔接杠杆带动阀心敞开阀门，循环作业，接连排水。

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.

组合式过热蒸汽疏水阀有两个阻隔的阀腔，由两根不锈钢管连通上下阀腔，它是由浮球式和倒吊桶式疏水阀的组合，该阀结构合理，在过热、高压、小负荷的作业状况下，可以及时地排放过热蒸汽消失时构成的凝聚水，有用地阻挠过热蒸汽走漏，作业质量高。高答应温度为600℃，阀体为全不锈钢，阀座为硬质合金钢，运用寿命长，是过热蒸汽专用疏水阀，填补了国内空白。

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.