Pneumatic valve plate brake brake summary of pneumatic valve 3)

flat brake pneumatic valve is a single or double plate with a pneumatic valve is a distraction. Pneumatic valve plate brake pressure, in the middle and lower, easy to leak. Total pressure pneumatic valve, to ensure ongoing good sealing, prestressing force should be given enough seats. Larger pre-tightening force, however, when the medium pressure is high, often open and close can lead to excessive sealing surface wear, affecting the service life of pneumatic valve. At the same time, usually cast iron or cast steel material pneumatic valve, it is very heavy, rather than a proper mobile applications. Therefore, the expansion and contraction type pneumatic valve, pneumatic valve plate brake design, in order to reduce the quality, improve the sealing performance and service life. Overall structure of the pneumatic valve body as a whole by plane symmetric structure, common brake pneumatic valve, pneumatic valve and pneumatic valve cover will be deemed to be a flat body design, this design reduces the body's structure, size and volume, saving pneumatic valve connection between body and cover bolts, effectively reduce the quality of the pneumatic valve. Seat has the independent design, ordinary pneumatic seat and pneumatic valve interface, switch to a different form of interface with the pneumatic valve seat, combining can change the pneumatic valve, effectively improve the flexibility and maintenance of the body, but also avoids the body caused by the deformation under high pressure pneumatic valve sealing problem is more serious. Sealing structure in order to improve the low pressure pneumatic valve sealing ability, in order to solve leakage, on the issue of low pressure pneumatic valve, at the same time reduce the friction between the door and pneumatic seat ring, increase the service life of the pneumatic valve, pneumatic valve seal design, mechanical seal ball spending expansion and contraction of the body. When pneumatic valve is closed, two fitness overhead agencies distraction, airtight cover, the production of sealing pressure, forcing double-sided sealing effect. When the pneumatic valve is opened, the top of the head the ball the agent contract, the door to leave within the seal face, in the process of our open or closed, to reduce the friction between the door and pneumatic seat ring. Pneumatic valve opening indicator non-rising stem the opening of the magnetic needle of the pneumatic valve indicator by a pointer table outside the pneumatic brake valve installed magnet driven magnetic sensors according to pneumatic valve opening. In different under the condition of pneumatic valve opens the door and instructions to install the magnet has one meter distance and different direction of the magnetic induction intensity on the indicating instrument can produce different indicators and direction sensor, namely different pointer indicates a pneumatic valve to open.