In the valve installation, in order to maintain the prevention of metal, sand and other foreign objects invade the valve, damage the sealing surface, the need to set the filter and flush valve; in order to maintain compressed air purification, in the valve before the need to set oil and water separator, or air filter; Taking into account the operation of the valve can check the working state, the need to set the instrument and the inspection valve; in order to maintain the operating temperature, set the insulation outside the valve facilities; in order to install the valve, the need to set the safety valve or check valve; taking into account the continuous operation of the valve , Easy to dangerous, the establishment of a parallel system or bypass system. 1. Check valve protection facilities: In order to prevent the check valve leakage or failure after the media backflow, causing product quality degradation, resulting in accidents and other adverse consequences, before and after the setting of one or two check valves. If you set two shut-off valves, can facilitate the removal of the check valve for maintenance. 2. Safety valve protection facilities: Before and after the installation method generally do not set the isolation valve, only in individual cases, can be used. If the media force contains solid particles, affecting the safety valve can not be shut off after take-off, before and after the safety valve to install a gate valve with a seal, the valve should be fully open state, the valve and the relief valve directly installed a pass DN20 inspection valve to the atmosphere. When appeasing the discharge of wax and other media at room temperature in a solid state, or gasification under reduced pressure to light liquid medium temperature below 0 degrees Celsius, the safety valve needs steam with heat. Safety valve for corrosive media, depending on the corrosion resistance of the valve, consider adding a corrosion-resistant explosion-proof membrane at the valve inlet. Gas relief valve is generally set according to its path a bypass valve, as a manual vent. 3. Pressure relief valve protection facilities: pressure relief valve installation facilities generally have three forms. Before and after the valve equipped with a pressure gauge to facilitate the observation of the valve before and after the valve pressure. After the valve is also equipped with a fully enclosed safety valve to prevent the valve fails, the valve pressure exceeds the normal pressure take-off, including the valve system. Drain pipe installed in front of the valve before the shut-off valve, mainly the role of drainage river flushing, and some traps. The main function of the bypass pipe is to close the shut-off valve before and after the pressure reducing valve, open the bypass valve, and adjust the flow by hand to play the role of temporary flow-through to repair the pressure reducing valve or replace the pressure reducing valve after the pressure reducing valve fails. 4. Traps protective facilities: traps with a bypass pipe on the edge and without bypass pipe two, there is no recovery of condensate recovery and condensate pay, drainage and other special requirements of the trap, can be used in parallel Form installation facilities. Traps with bypass valves, the main role in the pipeline starts to run, used to discharge large amounts of condensate. When servicing traps, it is not advisable to drain the condensate from the bypass pipe, which causes the steam to escape into the backwater system. Under normal circumstances, may not be installed bypass pipe. Only the heating temperature has strict requirements, continuous production of heat equipment installed bypass pipe.
silicone rubber gasket
Shengquan Industrial Corporation Limited , http://www.nb-gasket.com
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