Non-rising stem brake the difference between the pneumatic valve and pneumatic valve stem gate

non-rising stem brake the difference between the pneumatic valve and pneumatic valve stem gate

stem brake pneumatic valve and pneumatic valve is the main difference between non-rising stem gate:
and the ascension of the pneumatic valve screw non-rising stem gate is only rotation and supreme and moving, the leakage is a lever, the nut is fixed on the disc, improve ram through the rotation of the screw, no visible door frame; The ascension of the pneumatic valve screw stem gate is exposed, nut is close to the handwheel and fixed ( Not rotating axial movement) , improve ram through rotation of the screw, the screw and the rotation of the damper is the relatively movement without the relative axial displacement, appearance is a door shape bracket.
and screw non-rising stem brake pneumatic valve can't see, and can see the screw stem.
and pneumatic non-rising stem gate valve in the pneumatic valve stem is connected to the switch when the steering wheel and relatively fixed together, it is through the pneumatic valve stem in fixed point rotation to drive the pneumatic valve disc up and down brake to complete opening and closing. Rising stem gate pneumatic valve by pneumatic valve rod and screw thread of the steering wheel drive to ascend or lowered pneumatic disc. Pneumatic valve say simple point is rising stem gate is pneumatic disc attached to pneumatic do up and down together, the steering wheel is always in the attachment.


brake pneumatic valve according to the structure of the pneumatic valve stem can be divided into:
, pneumatic valve stem gate:
stem brake pneumatic valve, pneumatic valve stem nut on the pneumatic valve cover or stents, open and close the damper, using rotating pneumatic stem nut to realize the rise and fall of pneumatic valve stem. This structure is good for pneumatic lubrication of the stem, the degree of opening and closing, so widely used. Usually in lifting lever on the trapezoidal thread, through the nut at the top of the pneumatic valve and pneumatic valve guide groove, the rotary motion to linear motion, which is the operating torque thrust into operation. Pneumatic valve opening and closing a rising stem gate is ram, ram movement direction perpendicular to the direction of flow and the pneumatic valve stem gate can only be fully open and close, not to adjust and throttling. Pneumatic valve, non-rising stem gate:
non-rising stem brake pneumatic valve pneumatic valve (also called rotating lever gate Also called non-rising stem pneumatic wedge gate valves. Pneumatic valve stem nut in pneumatic valve body, direct contact with the media. When open and close the damper using rotary pneumatic valve stem. Pneumatic valve opening and closing a non-rising stem gate is ram, ram movement direction perpendicular to the direction of flow and the brake pneumatic valve can only be fully open and close, not to adjust and throttling. Pneumatic valve stem nut in ram, the handwheel turning drive pneumatic valve stem, and make the damper, usually at the bottom of the pneumatic valve stem has a trapezoidal thread, through the pneumatic valve at the bottom of the thread and pneumatic disc guide groove, the rotary motion into linear motion, and operating torque is thrust into operation.

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