(1) is used to adjust the high quality requirements of important regulatory systems to improve the positioning precision and reliability of the control valve.
(2) for a large pressure difference across the furniture movers valve (△ p> 1MPa) occasions. Air pressure is increased by increasing the output power of the implementing agencies to overcome unbalanced force generated by the liquid on the spool, reduce stroke errors.
(3) When the transfer medium to high temperature, high pressure, low temperature, toxic, flammable, explosive, in order to prevent external leakage, often very tight packing pressure, and therefore greater friction between stem and packing, this time Delays can be overcome with a locator.
(4) is adjusted, or medium for the viscous fluid containing Post lift tables suspended solids, can be overcome by the positioning of the media resistance to movement of the valve stem.
(5) for large diameter (Dg> 100mm) regulating valve to increase the output thrust actuators.
(6) when the distance regulator and the actuator when more than 60m, can be overcome by the positioning of the control signal transfer lag, the operation of the valve to improve the reaction rate.
(7) used to improve the flow characteristics of the control valve.
(8) a regulator to control the time division two actuators to implement process control, the two positioning devices are available, were treated with low and high input signal of the input signal, liftstar electric lift table the lower the forward movement of an actuator, operation of the other elevation, which constitute the points Cheng regulation.
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