What are the main points of pneumatic valve installation ( Petroleum chemical industry)

（ ） Pneumatic valve should be installed upright and close to the protected equipment or pipeline. If can't close to decorate, from the protected equipment or piping to the safety of pneumatic valve inlet pipeline total pressure drop, should not exceed safety % of pneumatic valve set pressure value.
( ） Security pneumatic valve should be set up maintenance platform. Arrangement of big weight to consider safety when the safety of the pneumatic valve pneumatic valve disassembly after lifting, should establish boom when necessary.
( ） Security pneumatic valve inlet pipe long radius elbows should be adopted.
( ） Safety design of pneumatic valve outlet piping back pressure shall not exceed the safe pneumatic valve should be considered a certain value of the constant pressure. For ordinary spring type safety pneumatic valve, the back pressure shall not exceed the safe % of pneumatic valve set pressure value.
( ） When into the vent duct or go to the torch of main medium with condensate or condensable gas, safety exports of pneumatic valve should be higher than the main; Otherwise, the drainage measures should be taken.
( ） Into the closed system of security to the flow direction of medium pneumatic valve outlet pipe should be suitable ° inclined at the top of the discharge duct, in order to avoid the total tube condensate poured into the branch pipe, and can reduce safety back pressure pneumatic valve,
( ） When security pneumatic valve on the import and export pipeline has cut off the pneumatic valve, pneumatic valve, should choose the single disc brake and seal, pneumatic valve should be installed, in order to avoid pneumatic valve rod, and pneumatic valve plate connection pin corrosion or loose, pneumatic valve plate. When security pneumatic valve with by-pass pneumatic valve, the pneumatic valve should be seal clearance.