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  • A Closer Look At Proportional Control
    A new proportional valve positions the solenoid's moving parts outside the core of the coil. This eliminates the need for tightly toleranced parts and prevents the armature from rubbing against the housing. The critical specifications engineers evaluate when selecting high-performance proportional
  • Proportional Valves
    are an inexpensive way to control position, velocity, or force on equipment requiring high-speed response at high flow rates. Many proportional valves are modified versions of four-way, on/off solenoid valves in which proportional solenoids replace conventional solenoids. In operation, solenoid force is balanced
  • Proportional valves eliminate design headaches
    New design produces consistent flow and gain. The EPV proportional valve has standard and manifold mounting options, a variety of orifice sizes and control voltage ranges, and three different electrical connectors. Performance curves for two conventional proportional valves show wide variations
  • Balancing A Variable Flow Water System Will Ruin the Control System
    Many seminars and technical sessions have been held to outline procedures for balancing variable flow water systems. Most of these sessions recommend "Proportional Balance." When this technique is used, all control valves are set wide open and the circulating pump is operated at maximum speed
  • Is variable speed drive the panacea we're looking for?
    Five types of internal control modes can be considered as suitable. for compressors: Dual, Quadro, Vario, and Proportional. Control, using inlet valve regulation, and Variable Speed Control. of the drive. motor (Fig. 1a). Of these five. modes, Dual,. Quadro and. Variable Speed. have proved
  • Dissecting high-performance electrohydraulic valves
    Things aren't black and white when choosing a servo or proportional valve. Servo and servoproportional valves control pressure or flow and are selected based on application. Proportional and servovalves control flow or pressure via a sliding spool element. First-stage configurations for nozzle
  • Big-time performance from compact valves
    , providing precise proportional pressure regulation. Electropneumatic-proportional (E/P) valves are typically used where applications demand precise control of pressure or force. The combination of a pneumatic valve and electronics accurately maintains preprogrammed pressures along with the ability
  • Electropneumatic Cylinders
    the set point, the valve shifts overcenter to build up pressure that opposes cylinder movement. Internal algorithms control rapid shifting of the valve from one side to the other, giving smooth deceleration to the desired position. Variables other than proportional feedback come into play. Thus

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