Hydrophobic device called the trap, also called automatic drainage or water discharge, it is divided into used steam system and gas system. Hydrophobic device installed in steam heating pipe line terminal, the role of the condensed water of steam heating pipe emissions to the outside of the pipe. Mostly hydrophobic device can automatically identify steam, water, Not including hot static type) To achieve the goal of automatic steam resistance drainage. Hydrophobic device widely used in petroleum chemical industry, food, pharmaceutical, power plant and other industries, plays a big role in energy conservation and emissions reduction. Trap also there are many, we need to know before select trap under the principle of all kinds of steam trap. 1 buoy type steam trap: pontoon type steam trap are mainly valves, shaft rod and guide tube, buoy and the shell component composition and so on. When the equipment or piping in condensate and water under the steam pressure to push into the trap, increase gradually to meet nearly fill buoy, due to the weight more than the buoyancy of buoy sinks down down, make the throttle valve opens. This makes the water in the steam pressure inside the cylinder under the action of the tube and the valve discharge. All of them when the buoy in the water near, due to the weight of buoy float upwards, to close the throttle, began to accumulate the condensate in the buoy. Such work periodically, can automatically discharge the condensate, and can prevent the steam to escape. 2 bell float type steam trap: bell float type steam trap is also called the bucket type steam trap is mainly composed of dampers, bucket, shell and filtering devices and components. Be inverted bucket steam trap, beginning in the down position, the valve is open. When the equipment or piping in the cold air and water in steam pressure driven into the trap, then by the regulator. On the one hand, when a small amount of steam and no discharge air is full of inside the bucket volume gradually, at the same time the condensate ceaseless stockpile, bucket rise due to buoyancy, the valve closes, stop discharge frozen water. , on the other hand, a small percentage of the inside of the bucket steam and air holes on the top of the discharge from the bucket, and condensed liquid after the big part of the heat dissipation, so that the bucket buoyancy decreases and whereabouts, make the valve opens, and discharge frozen water. Such work periodically, can automatically discharge the condensate, and can prevent the steam to escape. 3 thermodynamic type steam traps: when the equipment or pipe condensate flow resistance in the air after the discharge Industrial Valves, variable pressure indoor steam condensation and then to reduce the pressure, force is greater than the above the following Industrial Valves plates by force, so the valve slice jacked up. Because water is lower than the viscosity, flow rate of steam, the valve plate and between the bottom of the valve is not easy to cause the negative pressure, not easy to get through at the same time, the condensate valve clearance between shell and the transformer room, to keep the valve open, water flows through the circular groove. When equipment or a pipe after steam flow of steam trap, because the steam condensation water than low viscosity, high flow velocity, so ask cause negative pressure valve plate and valve seat, with part of the steam into the pressure chamber, so the force is greater than the above valve plates below by force, to quickly close the valve. Such periodic work, can automatically discharge condensate water, and can prevent the steam to escape.
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