As the advantages and disadvantages of pneumatic valve and installation issues

has the following advantages:
. Simple structure, manufacture and maintenance more convenient.
。 Working stroke is small, opening and closing time is short.
。 Good sealing, sealing surface friction between the small, long service life.
as the shortcoming of pneumatic valve is as follows:
. Fluid resistance is big, open and closed when the required force is larger.
。 Do not apply to the medium with larger particles, viscosity, easy to coking.
. Poor regulation performance.
as the types of pneumatic valve according to the location of the pneumatic valve stem threads with external thread type, internal thread type. According to the flow of medium, have straight-through type, straight and Angle. By the pneumatic valve points, the form of the seal packing seal by the pneumatic valve and pneumatic valve bellows seal globe.
as pneumatic valve installation and maintenance should be paid attention to the following:
. Hand wheel, lever operation by the pneumatic valve can be installed in any position.
。 The handwheel, handle and wei mechanism, does not allow for lifting.
。 The flow of medium should be consistent with the direction arrow shown in pneumatic valve body.