A: Trap definition: Trap is used in steam pipe network and equipment, can automatically discharge condensate, air and other non-condensable gas, and water vapor leakage valve. According to the different working principle of steam traps, steam traps can be turned into the following three types: Mechanical type: relying on the steam trap condensate changes in the level of Wei Wei action, 1. Steam traps are installed between steam heating equipment and condensate return headers. When driving, the bucket is at the bottom and the valve is fully open. Condensate into the trap after flowing to the bottom of the bucket, filled with the valve body, all submerged barrel, and then, condensate water through the fully open valve to the backwater header. 2. Steam also enters the trap from the bottom of the barrel, occupying the top of the barrel and creating buoyancy. Slowly rise the barrel body, and gradually move the lever toward the seat until the valve is completely closed. Air and carbon dioxide gas pass through the barrel vent holes and collect at the top of the trap. The steam exhausted from the vent will condense due to heat dissipation from the trap. 3. When the incoming condensate begins to fill the barrel, the barrel begins to exert a pulling force on the lever. As the condensate level continues to rise, the resulting force increases until it overcomes the pressure differential and opens the valve. 4. The valve begins to open, and the pressure differential acting on the valve flap will decrease. The barrel will rapidly drop so that the valve is fully open. The non-condensable gas accumulated at the top of the trap is discharged first, and then the condensed water is discharged. When the water flows out of the barrel body, the dirt flows out of the trap together. While the condensate is being discharged, steam begins to re-enter the trap and a new cycle begins again. Second: Control Valve: The control valve is a self-lubricating water valve body, without additional oil lubrication, in case of damage to the main valve parts, please follow the instructions below for disassembly. (Note: the general consumption of damage within the valve products for the diaphragm and o-ring, other internal parts little damage) 1. The main valve before and after the end gate valve closed. 2. Release the pipe fitting screw on the main valve cover to release the pressure in the valve. 3. Remove all screws, including the nuts of the necessary brass in the control line. 4. Take the valve cover and spring. 5. The axis, diaphragm, piston and other removed, do not damage the diaphragm. 6. After the above items are removed, check the diaphragm and â—‹ ring is damaged; if no damage do not subcontract their own internal components. 7. If it is found that the diaphragm or o-ring is damaged, please loosen the nut on the shaft core, break out the diaphragm or ring by Zhejiang, and then replace it with a new diaphragm or o-ring. 8. A detailed examination of the main valve internal valve seat, shaft and other damage if any other debris in the main valve to clean it out. 9. In reverse order is the replacement of the main components of the valve assembly, pay attention to the phenomenon of the valve can not be jammed. 10. Please refer to the installation precautions to reuse. The difference between the two is obvious, one is the output of a input. This article Keywords: valve
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