Mini Dry Claw vacuum pump,Lab Vacuum Pump,Claw Vacuum Pump,Screw Vacuum Pump Shandong Newels International Co., Ltd , https://www.newelsindustrial.com
Ball valve structure and use characteristics
1) Structure and Application of Ball Valve Ball valve is a mature old product with "O" ball valve and "V" ball valve. It uses the rotation of the core and the valve seat to open the area to adjust the flow, the use of the following features: (1) the most prominent feature is the simplest flow path, the smallest loss, "self-cleaning" the best performance. (2) "O" ball valve unimpeded adjustment, Kv maximum, usually used for two clean media off. (3) The V-shaped ball valve provides adjustment characteristics of approximate logarithmic flow characteristics. The V-shaped ball valve and the valve seat are sheared when they rotate relative to each other. This valve is especially suitable for applications where high viscosity, suspension, pulp, Media regulation, cut off. (4) The force of the valve core is under the action of △ P, the valve ball is pushed to one side of the valve seat, and the pressing force generated on the valve seat increases the friction force when the valve core rotates. Therefore, ΔP mainly occurs Is a kind of friction, the implementing agency to overcome this friction is much easier, that is, the ball valve to cut off the pressure difference. (5) special ball valve for water treatment can be applied to strong corrosive media occasions. (6) ball valve and diaphragm valve applications are similar, it is recommended to use multi-purpose valve less diaphragm valve (diaphragm too easy to bad). 2) The use of the ball valve The valve has more advantages than through-valve, but poor reliability, too bulky, expensive and limits its use; usually the seat for the soft PTFE material, the purpose is to better Cut off, but the temperature and wear not, therefore, should use "hard to hard" seal. The recommended alternative to the product is still a full-featured ultralight valve (with butterfly valve, V-ball valve, eccentric valve common advantages).