By the pneumatic valve working principle and fault maintenance

as pneumatic valve, pneumatic valve also known as operation can be subdivided into two by the pneumatic valve and tee as pneumatic valve.
the pneumatic valve is installed in the equipping outdoor tube fluid in the tube and tube side, by the positioning adjustment of mouth and two perpendicular lines. One line of outdoor units with liquid pipe ( The trachea) Side to the other line by flaring nut ( Or welding) Connected to the side of the indoor unit piping. Working principle of the
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the so-called tee cut-off solenoid valve relative to the much more by the pneumatic valve is mainly an access port, provides convenience for the maintenance of air conditioning.
tee as pneumatic valve has two kinds, one is the maintenance by the pneumatic valve, mouth inside of the valve pin tee changed from a pipe connectors, a mouth and a maintenance mouth, four mouth are perpendicular to each other.
if pneumatic valve lever down to the closed position, piping and outdoor units line disconnected; Pneumatic valve stem and moving upward to the opening location, two connecting line conduction, has nothing to do with the pneumatic valve switch position.
the other is a maintenance hole no valve pin, it has two show the word level connection pipe, a mouth and a maintenance.
the shape of the lower part of the pneumatic valve stem and the former as pneumatic valve cone surrounding is different, but a flat spherical. This kind of valveless pneumatic valve repair mouths pin, rely on the built-in flaring in the brass cap nut screw tight closure.
and breakdown maintenance
as pneumatic valve failure for leak failure, leakage mainly includes the following three conditions:

1), pneumatic valve core leak reasons for excessive foreign matter in welding protection, do not pay attention to when the cooling system, the sealing ring itself damage and other problems.

(2), thread and smooth silk by the pneumatic valve connection between indoor and outdoor pipeline, and the bell mouth sodium of threaded connection smooth silk as a result of installation too hard.

(3) and valve core leak welding does not reach the designated position, the valve core itself quality closes nevertheless, causes the leak.
generally if the pneumatic valve cap on the valve core if tight can rise to prevent leaks, if the valve inside leakage is too serious, operating pneumatic valve must be replaced.
as pneumatic valves are available in leak detection to find out the funnelled with soap and water leak detection, and fault maintenance methods of the basic only one, that is replace by the pneumatic valve.