The mechanical type, also known as the float type, utilizes the difference in density between the condensed water and the steam. By changing the liquid level of the condensate, the float lifts the valve flap to open or close, thereby achieving the purpose of blocking steam.
The mechanical type, also known as the float type, utilizes the difference in density between the condensed water and the steam. By changing the liquid level of the condensate, the float lifts the valve flap to open or close, thereby achieving the purpose of blocking steam. The float type trap has a small degree of subcooling and is not affected by the working pressure and temperature change. Water is discharged, and no water is stored in the heating device, so that the heating device can achieve the best heat exchange efficiency. The maximum back pressure is 80% and the working quality is high. It is the most ideal steam trap for production process heating equipment. The float type trap can be divided into free float type, free half float type, lever float type and inverted bucket type. Wait.
1, free float trap
The three-fine free float trap has a simple structure and has only one movable part of finely ground stainless steel hollow float. It is both a float and a starter, no fragile parts, and has a long service life. The trap has a Y series inside. Automatic air exhaust device, very sensitive, can automatically discharge air, high quality work.
When the equipment is started, the air in the pipeline is discharged through the Y series automatic air exhaust device. The low temperature condensed water enters the trap. The liquid level of the condensate rises, the float rises, the valve opens, the condensate is quickly discharged, and the steam enters quickly. The equipment and equipment are rapidly warmed up, and the temperature-sensitive liquid of the Y-series automatic air-discharging device expands, and the automatic air-discharging device is closed. The trap begins to work normally, and the float moves up and down with the condensate level, blocking steam and draining. The valve seat of the free float trap is always below the liquid level, forming a water seal, no steam leakage, and good energy saving effect. The minimum working pressure is 0.01Mpa, and it is not affected by temperature and working pressure fluctuations from 0.01Mpa to the maximum operating pressure range, and continuous drainage. It can discharge condensed water with saturated temperature, the minimum subcooling degree is 0 °C, and there is no water in the heating equipment, which can make the heating equipment achieve the best heat exchange efficiency. With a back pressure of more than 85%, it is one of the most ideal steam traps for production process heating equipment.
2, free semi-float trap
The free semi-float trap has only one semi-floating ball barrel as the moving part, and the opening is downward, and the barrel is the opening and closing member and the sealing member. The entire spherical surface can be sealed, has a long service life, can resist water hammer, has no wearing parts, no faults, is durable, and has no steam leakage. The back pressure ratio is more than 80%, and the condensed water can be discharged at a saturated temperature. The minimum degree of subcooling is 0 ° C. There is no water in the heating equipment, which can make the heating equipment achieve the best heat exchange efficiency.
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When the device is just started, the air and low-temperature condensate in the pipeline enter the trap through the launch tube. The bimetal evacuation element in the valve bounces the bucket, the trap opens, and the air and low-temperature condensate are quickly discharged. When the steam enters the bucket, the bucket produces upward buoyancy, while the temperature inside the valve rises, the bimetal evacuation element contracts, the bulb floats toward the valve port, and the trap closes. When the steam in the bucket becomes condensed water, the bucket loses its buoyancy and sinks, the trap opens, and the condensate drains quickly. When the steam re-enters the barrel, the trap is closed again, intermittently and continuously.
3, rod float trap
The basic characteristics of the rod float type trap are the same as that of the free float type. The internal structure is that the float connecting rod drives the valve core, and the valve is opened and closed with the liquid level of the condensed water. The rod float trap uses a double seat to increase the condensate displacement, which can achieve a small volume and a maximum displacement of 100 tons / hour. It is the most ideal steam trap for large heating equipment.
4, inverted bucket type trap
The inside of the inverted bucket type trap is an inverted bucket for the liquid level sensitive part, the bucket opening is downward, and the inverted bucket connecting the lever drives the valve core to open and close the valve. The inverted bucket type trap can discharge air, is not afraid of water hammer, and has good anti-fouling performance. The degree of undercooling is small, the leakage rate is less than 3%, the maximum back pressure is 75%, the connection parts are more, and the sensitivity is not as good as that of the free semi-float type trap. Because the inverted bucket type steam trap is closed by steam upward buoyancy, when the working pressure difference is less than 0.1MPA, it is not suitable for selection.
When the device is just started, the air in the pipeline and the low-temperature condensed water enter the trap, and the inverted bucket falls by its own weight. The inverted bucket connects the lever to drive the valve to open the valve, and the air and low-temperature condensate are quickly discharged. When the steam enters the inverted bucket, the steam of the inverted bucket generates upward buoyancy, and the inverted bucket rises to connect the lever to drive the valve core to close the valve. There is a small hole in the inverted bucket. When a part of the steam is discharged from the small hole, another part of the steam generates condensed water. The inverted bucket loses its buoyancy and sinks by its own weight. The inverted bucket connects the lever to drive the valve core to open the valve. Work, intermittent drainage.
5. Combined superheated steam trap:
The combined superheated steam trap has two isolated valve chambers, which are connected by two stainless steel tubes to the upper and lower valve chambers. It is a combination of a floating ball type and an inverted bucket type steam trap. The valve structure is advanced and reasonable, in overheating, high pressure, Under the condition of small load, it can discharge the condensed water formed when the superheated steam disappears in time, effectively prevent the superheated steam from leaking, and the work quality is high. The maximum allowable temperature is 600 ° C, the valve body is all stainless steel, the valve seat is made of hard alloy steel, and the service life is long. It is a superheated steam trap.
When the condensed water enters the lower valve chamber, the float of the sub-valve rises with the liquid level, and the float ball closes the inlet pipe hole. The condensed water rises to the main valve chamber through the water inlet pipe, and the inverted bucket falls by its own weight, driving the valve core to open the main valve and discharging the condensed water. When the condensate level of the secondary valve chamber drops, the float drops with the liquid level and the secondary valve opens. The steam enters the inverted bucket in the upper main valve chamber from the inlet pipe, and the inverted bucket generates upward buoyancy, and the inverted bucket drives the valve core to close the main valve. When the condensate level of the secondary valve chamber rises again, the next cycle begins again, intermittently draining.
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