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Two pneumatic valve classification and characteristics

[来源:original] [作者:admin] [日期:13-08-09] [点击:]

The second type classification and characteristics of the pneumatic ball valve
Two type pneumatic ball valve is ball valve with pneumatic actuator.
Pneumatic actuators to perform relatively fast speed, and does not require hands-on workers, to a great extent, save the human resources and time. The second type pneumatic ball valve is to rely on the working principle of rotary valve love to keep the valve open or occlusion. Pneumatic ball valve switch lightweight, small size, can make a large caliber, reliable sealing, simple structure, convenient maintenance, sealing surface and the spherical often in the closed state, not easily be medium erosion, has been widely used in various industries.
Two type pneumatic ball valve and ball valve has a O V type ball valve.
O type ball valve structure of floating type, ball core for precision casting, hard chromium plating processing, appearance with enhanced ptfe seat material, flow crossing the same as the pipe diameter, flow capacity, small flow resistance, closing without leakage, generally do switch valve is used, especially suitable for high viscosity, fiber, granular media; V-shaped ball valve USES the fixed structure, the ball on a v-shaped incision, which can realize proportional control, flow characteristic is approximate equal percentage.
According to different process equipment can choose pneumatic or electric actuators, forming an and electric ball valves, pneumatic ball valve such as pneumatic ball valve must be regulated to achieve proportional valve positioner, such as the electric ball valve to be regulated to achieve proportional election electronic actuators or servo amplifier, etc. ?From the material, can be divided into: carbon steel ball valve, 304 stainless steel ball valve, ball valve and 316 bronze ball valves? With applications, can be divided into: high pressure ball valve and low pressure ball valve? High pressure pneumatic ball valve: mainly used in oil, gas, hydraulic oil, engineering machinery and other industries
Low pressure pneumatic ball valve: mainly used in corrosion medium such as water pipe on the road!
The advantages of two type pneumatic ball valve
1. The fluid resistance is small, the resistance coefficient with section of equal length. 2. Simple structure, small volume, light weight. 3. Compact and reliable, the widespread use of plastic ball valve sealing surface of materials, good sealing, also has been widely used in the vacuum system. 4. Easy to operate, open and close quickly, from open to close just rotate 90 °, is advantageous for the remote control. 5. Convenient maintenance, simple structure, pneumatic ball valve sealing ring are generally activities, remove the replacement is more convenient. 6. The full open or full close, sphere and valve seat sealing surface and the dielectric isolation, medium through, does not cause the valve sealing surface erosion. 7. Applicable scope is wide, size from small to several millimeters, big to a few meters, from high vacuum to high pressure can be applied. Two type pneumatic ball valve has been widely used in petroleum, chemical, power, papermaking, atomic energy, aerospace, rocket and other departments, as well as in People's Daily life.


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