VQ647F / H / Y pneumatic V type ball valve flanged ball valve with pneumatic V-type actuators and other annexes, is a right-angle swing level control valve structure. Actuator points single and double acting two, V-ball sealing flange into the form of soft seal and hard seal two, because the pneumatic V type ball right angle rotary structure, when the rotation of the spool relative to the valve seat a strong shearing action, so the product is particularly suitable for modulating control with fiber and fine particles of the medium. The valve is widely used in petroleum, chemical, power, paper making, metallurgy and other industries.
VQ647F / H / Y pneumatic V type ball valve, pneumatic piston actuator for the dual role: air pressure generated by the double-acting positioning signal outputs are input actuator piston left and right second chamber, the input piston left and right two Air pressure chamber is different form the pressure, push the piston in a straight line through the gears, rack drive, the linear motion of the piston is converted to rotary motion of the actuator spindle until the left and right chambers pressure balance, motion stops while the rotational movement of the actuator drive stem rotates the spool, the spool change, the flow area between the valve seats, to regulate purpose; pneumatic piston actuator single role: the single acting positioner output air pressure input signal to the actuator without spring side of the gas chamber, under the effect of the difference between the force and the spring force of the gas signal pressure acting on the piston is formed, the cylinder piston in a straight line through the gears, rack drive until the air force and the spring force signal pressure formed in equilibrium, motion stops, while the actuator stem drive shaft rotates, the spool rotates, thereby changing the spool, the flow area between the valve seat, to regulate purpose.
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