Ventilation butterfly valve structure and basic principles

Structural features 1 The use of a new structure of the mid-line disc and short structural steel welded design and manufacture of compact structure, light weight, easy to install, small flow resistance, large flow. Lightweight 2 without connecting rod, bolts, etc., reliable, long service life. Can b

Sprinkler Disc Brakes and Drum Brake Features

Sprinkler disc brakes have been widely used in cars, but in addition to the use of all the wheels in some high-performance cars, most of them work only on the front brakes, and with the rear drum brakes, in order to have a higher system of cars Movement dir