Pneumatic valve disc brake structure

the sealing surface configuration can be divided into the wedge disc brake pneumatic valve, pneumatic valve and parallel disc brake wedge disc brake pneumatic valve can be divided into: single gate type, double disc and flexible disc; Parallel disc brake pneumatic valve can be divided into single ram and double ram.
） Parallel brake pneumatic valve, sealing surface parallel to the vertical centerline, the two pneumatic valve sealing surface parallel to each other gate. In parallel brake pneumatic valve, with thrust wedge structure for common, most often in both two gate with double side thrust wedge, the brake pneumatic valve is suitable for the low pressure of medium and small diameter ( DN— mm） Pneumatic valve gate. A between the two gate there is spring, spring can be preloaded force, is advantageous to the disc sealing.
） Pneumatic wedge gate valve, sealing surface and vertical centerline into some sort of perspective, namely two pneumatic sealing surface into a wedge gate valves. Sealing surface Angle generally have a ° & acute; °,朴归隐者; , °, °, °, such as Angle mainly depends on the size of the medium temperature. Taken by the higher the working temperature, the greater the Angle should be, to reduce the temperature change occurs when the possibility of a wedge. In the pneumatic wedge gate valve, and the single ram, double disc and flexible disc. Single ram air wedge gate valve, the structure is simple, the use of reliable, but for the sealing surface Angle of the accuracy is higher, the processing and maintenance more difficult, the temperature changes of wedge possibility is very large. Double ram pneumatic wedge gate valve is widely used in the water and steam pipe. Its advantages are: precision requirements for sealing surface Angle is low, the temperature change is not easy to cause the phenomenon of wedge, sealing surface wear, can add gasket compensation. But this kind of structure parts is more, easy bonding in viscous medium, and affect the sealing. More mainly upper and lower damper long-term use are prone to rust, ram is easy to fall off. Flexible disc pneumatic wedge gate valve, it has a single ram pneumatic wedge gate valve structure simple, the advantages of using can be *, and make up for the sealing surface Angle can produce trace amounts of elastic deformation occurring in the process of processing deviation, improve the manufacturability, is widely adopted now.