Water supply system commonly used types and characteristics of pneumatic valves

water supply pipeline system often use pneumatic valve pneumatic valve has a gate ( Thread, flange) Pneumatic valve, globe ( Thread, flange) , check the pneumatic valve ( Thread, flange) Pneumatic valve, butterfly type, etc.
　　（ ） Brake pneumatic valve: can clear rod, non-rising stem, a variety of forms such as manual, electric, motor drive, brake pneumatic valve has a small fluid resistance, opening closing force is small, and medium can flow from any direction, etc. But the structure is relatively complex, disc sealing surface impurities or granular material could easily wipe or deposited at the bottom of the pneumatic valve, close the imprecise defects. Often open the pneumatic brake valve pneumatic valve plate can appear sometimes falls off phenomenon, make the system out of control.
　　（ ) Compared by pneumatic valve, pneumatic valve and gate has simple structure, good sealing performance, convenient maintenance, but slightly greater than the brake pneumatic valve opening closing force, pneumatic (marked with arrow on valve body should be paid attention to install The water) Direction, shall not be installed backwards.
　　（ ) Butterfly pneumatic valve: role to play in full open full close on the feed water pipe of a pneumatic valve. Its opening closing force is bigger, but the pneumatic valve smaller and lighter.
butterfly pneumatic valve is a lot of more phyletic, according to the drive mode and a lever, worm gear and worm drive type, electric, pneumatic and other types.
　　（ ) Check pneumatic valve, pneumatic valve, also called non-return is a only allowed to medium flows in one direction of pneumatic valves, so it has a strict direction. The pipeline is mainly used to prevent water backflow.
common check pneumatic valve lift and swing. Vertical elevating disc check pneumatic valve should be installed in vertical pipe runs; Elevating the level of disc check pneumatic valve and swing check valve installed in horizontal pipe runs, when installation note pneumatic valve body the direction of arrow mark, shall not be installed backwards.