The inverted bucket steam trap is installed between the steam heating device and the condensate return header. When driving, the bucket is at the bottom and the valve is fully open. After the condensate enters the trap, it flows to the bottom of the bucket, fills the valve body, and is completely immersed in the barrel. Then, the condensed water is discharged to the return header through the fully open valve.
The inverted bucket trap works on the principle that steam also enters the trap from the bottom of the barrel, occupying the top of the barrel and generating buoyancy. The barrel slowly rises and gradually moves the lever in the direction of the seat until the valve is completely closed. Air and carbon dioxide gas collect through the exhaust orifice of the barrel and collect at the top of the trap. The steam discharged from the vent hole will condense due to the heat dissipation of the trap.
The barrel begins to exert a pulling force on the lever when the incoming condensate begins to fill the barrel. As the condensate level continues to rise, the resulting force continues to increase until the pressure differential can be overcome and the valve is opened.
When the valve begins to open, the pressure differential acting on the valve flap will decrease. The barrel will drop rapidly and the valve will be fully open. The non-condensable gas accumulated on the top of the trap is discharged first, and then the condensed water is discharged. When the water flows out of the barrel, it drives the dirt out of the trap together. At the same time as the condensate is discharged, the steam restarts into the trap and opens a new working cycle.
The structural design of the inverted bucket trap of Hangzhou Watt is very reasonable. Because the floating bucket opening is inverted, it can prevent the damage caused by water hammer, and in order to prolong the service life, the wear points are strengthened. The inverted bucket trap has only two moving parts - the valve lever suspension and the inverted bucket. There are no fixed fulcrums and complicated connections, no jamming or blockage.
The inverted bucket trap is a very reliable steam trap. The structure is relatively simple, so it is easier to produce. How to choose a high quality inverted bucket steam trap? Hangzhou Watt energy saving experience is the first choice of professional steam trap. Production plant (TS certificate).
The valve seat design of the steam trap must consider sufficient hardness and erosion resistance, because the steam trap is the dividing point of the steam system and the condensate system. The pressure drop on the steam trap is one of the maximum pressure drop of the steam system. The flashing of etch and condensate is a condition that the trap must face. Seat material and heat treatment processes are at the heart of steam trap manufacturing.
Hangzhou Watt's experience is that the inverted bucket must use corrosion-resistant and water hammer materials. The valve core is connected to the inverted bucket. The deformation and displacement of the inverted bucket will cause the trap seal to fail. The small hole at the top of the inverted bucket is used to discharge non-condensable gas, which may cause steam leakage if the corrosion changes.
The valve body can be coated with sand casting or silica sol casting technology to improve the surface finish and mechanical properties of the valve body, reduce the appearance of pores, blisters and cracks, and enhance the tensile strength of the casting. In the hydraulic test, the leakage of the joint portion of the valve body valve body connected by bolts is relatively easy to find, and it is difficult to find the pores and "sand eyes" of the valve body and the valve cover itself during casting. Even if the water pressure test is qualified, the trap will often cause leakage due to the blisters of the casting. It can be seen that the difficulty of casting sand holes is found.
For example, in the hydrostatic test, some micropores are not exposed to the outside, and some castings have no leakage due to a very thin wall. These conditions will gradually leak due to internal pressure during use. Hangzhou Watt believes that cast steel products have poor fluidity of cast steel due to different casting processes. For traps with complex internal flow passages, it is easier to produce pores and blisters than cast iron products, so forgings are often used in high pressure applications. .
The method of "air tightness test" is the same as the inspection of bicycles and car tires. The test object (that is, the steam trap valve body with the bonnet installed) is fixed on a special vise, and the valve is inflated and pressurized, and then placed in the water tank, which is a method for easily detecting the leak. Watt Energy Saves X-ray inspection of castings for customer specific requirements or harsh service applications.
For traps with special requirements, such as required material certificate, welding inspection certificate, gasket material certificate, casting furnace batch number, etc., can be installed before checking before installation.
The inverted bucket trap is a mechanical type of trap. The trap has a certain pressure difference. As a pressure element, the maximum working pressure and maximum working pressure difference must be indicated on the nameplate of the trap, as well as the maximum working temperature and design temperature. .
Watt's energy-saving experience shows that when inverted bucket traps are used for superheated steam or applications with severe load changes, a trap with built-in check valve function is required to avoid steam leaks due to loss of water seal.
The five tests, such as hydrostatic test, pressure test, action test, discharge test, and durability test, are called general performance tests. Each of these tests should be widely implemented in production. When performing these tests, if the steam trap operates in an abnormal state, it can be used as a reliable product. If a functional test is available. A one-to-one test report or certificate of conformity provided by the manufacturer is provided.
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