Ball valve classification and use
The ball valve is a valve that uses a sphere with a circular channel as the opening and closing part. The sphere rotates with the valve stem to realize the opening and closing action. It has the action of rotating 90 degrees. The ball valve is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. It only needs to be rotated 90 degrees and a small torque can be closed tightly.
Ball valves can be divided into: floating ball valve, fixed ball valve, V-shaped ball valve, ash discharge ball valve, anti-sulfur ball valve, plastic ball valve, ferrule ball valve, welded ball valve, air source ball valve, integrated ball valve, chip ball valve, screw ball valve , Straight ball valve, three-way ball valve, four-way ball valve, insulation ball valve, inclined ball valve, pipeline ball valve, orbital ball valve, anti-corrosion ball valve, etc.
Main standards, specifications, and parameters of commonly used ball valves:
1. Ball valve pressure grade: PN1.0-32.0MPa, 150LB-900LB, JIS10-20K
2. Nominal diameter of ball valve: DN6-DN800, 1/4"-36"
3. Ball valve thread standard: G thread, ZG thread, NPT thread, BSPT thread, etc.
4. Ball valve connection method: flange, butt welding, thread, socket welding, welding, ferrule, etc.
5. Applicable temperature of ball valve: -196℃-0℃0℃～540℃
6. Ball valve drive mode: manual, worm gear drive, pneumatic, electric, hydraulic, gas-liquid linkage, electro-hydraulic linkage
7. Valve body material: WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, CF8 (304), CF3 (304L), CF8M (316), CF3M (316L), chrome molybdenum steel
The valve material of the ball valve can be selected according to the medium used, and it can be applied to various media such as water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea, etc.