When installing pneumatic valves must pay attention to the protection measures

in the pneumatic valve installation, in order to keep prevent metal, sand and other foreign invasion of pneumatic valve, sealing surface damage, need to set up filters and flush the pneumatic valve; In order to keep the compressed air purification, in front of the pneumatic valve need to set the oil-water separator, or air filter. Considering the operation can check pneumatic valve working condition, you need to set up and check the pneumatic valve instrument; In order to keep operating temperature, on the outside of the pneumatic valve set heat preservation facilities; To pneumatic valve after installation, you need to set up safety pneumatic valve or check valve; Considering the continuous work of pneumatic valve, easy to danger, set up a parallel system or bypass system, etc.
. Check pneumatic valve protection facilities: in order to prevent leakage check pneumatic valve or expires medium flow back, cause the decrease of the quality of the products, cause an accident consequences, such as check pneumatic valve set before and after one or two to cut off the pneumatic valve. If set two cut pneumatic valve, can facilitate maintenance check pneumatic valve is removed.
. Safety of pneumatic valve protection facilities: before and after the installation method is generally not set partition pneumatic valve, only in individual cases, can be used. Such as medium containing solid particles, affect the safety of pneumatic valve cannot be locked after takeoff, the security before and after pneumatic valve installed a seal the pneumatic brake valve, pneumatic valve should be in the fully open position, brake brake pneumatic valve and safety valve directly to furnish a check pneumatic valve to the atmosphere of DN. When calm discharge media such as wax for solid state at room temperature, or pressure gasification and make the light liquid such as medium temperature is lower than c, safety pneumatic valve need to steam heating. For the safety of the corrosive medium pneumatic valve, pneumatic valve corrosion resistance, considering the pneumatic valve inlet and corrosion resistance of the explosion-proof membrane. Gas safety pneumatic valve according to the general size set a by-pass pneumatic valve, as the manual vent.
. Reduced pressure pneumatic valve protection facilities: the reduced pressure pneumatic valve installation facilities generally has three forms. Before and after the decompression pneumatic valve is equipped with pressure gauge, convenient observation before and after pneumatic valve pressure pneumatic valve. Has equipped with fully enclosed safety after pneumatic valve, pneumatic valve, pneumatic valve in case of decompression after failure, pneumatic valve after pressure than normal pressure jump, contains pneumatic valve system. Drain pipe is installed in front of the pneumatic valve shut off in front of the pneumatic valve and mainly drainage river flushing effect, some use hydrophobic pneumatic valve. By-pass pipe is the main role after the decompression pneumatic valve failure, close vacuum pneumatic valve before and after the cut off pneumatic valve, open the vent valve, flow adjustment by hand, temporary circulation effect, in order to repair the reduced pressure pneumatic valve or replace relief valve.
. Hydrophobic pneumatic valve protection facilities: the edge of hydrophobic pneumatic valve with by-pass pipe and without by-pass pipe two kinds, the condensate recovery and the condensate does not pay, recycling displacement of hydrophobic pneumatic valve and other special requirements, can be used in parallel form installation facilities. With pneumatic valve of hydrophobic side ventilation valve, its main role in the pipes started running, used to discharge a large amount of water. Hydrophobic pneumatic valve, discharge the condensate with by-pass pipe is not appropriate, it will make the steam into the return water system. In general, don't install by-pass pipe. Only have strict request for heating temperature, heat, with the continuous production equipment to install by-pass pipe. （ Source: hubei thermal, science and technology)