Overview and Application
VF eccentric rotary valve is composed of a pneumatic piston actuator and an eccentric rotary valve. It is a quarter-turn regulating valve that controls fluid by rotating part of the ball valve plate around an eccentric axis. The center of rotation of the valve core is not concentric with the axis of rotation. Reduces wear and tear. To extend the service life, there is a guide wing at the rear of the valve core. It is conducive to the stable flow of fluid and has good stability. Secondly, it also has the characteristics of large flow rate and wide adjustable range. Widely used in petroleum, chemical industry, electric power, metallurgy, steel, papermaking, medicine, food, textile, light industry and other industries.
Technical Parameters
Type: Eccentric rotary valve
Nominal diameter: 25~300mm
Nominal pressure: PN1.6~6.4MPa
Connection type: flange type (flange standard: JB/T79.1-94, 79.2-94, etc.)
Material: cast steel {ZG230-450),
Cast stainless steel (ZG1Cr18Ni9Ti, ZG1Cr18N12Mo2TI), etc.
Upper valve cover: integrated with the valve body -45~+400℃
Gland type: Bolt pressing type
Filling: V-type PTFE filler, impregnated PTFE asbestos filler, asbestos textile filler, graphite filler
appendix
Positioner, air filter pressure reducer, position retaining valve, travel switch, valve position transmitter, handwheel mechanism, etc.
performance
Hysteresis: with positioner, less than 1% of the full stroke
Leakage amount: Comply with ANSIB16.104 standard, soft seal level VI, hard seal level IV
Basic error: with positioner: less than 2% of the full stroke
Adjustable ratio: 100:1