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Servo Valve Product Guide

Brands We Repair:

  • Abex
  • Atchley
  • Bosch
  • Dynamic
  • Moog
  • Oilgear
  • Parker
  • Pegasus
  • Rexroth
  • Sunstrand
  • Vickers
  • and many more

What They Do:

A Servo valve is a directional valve with the capability
of being infinitely positioned to provide control of both
the amount and the direction of fluid flow.

Primary Types and How They Work:

By adjusting an electrical signal to a torque motor or
similar device, a servo valve very accurately positions
a spool to allow fluid flow through a passage.

The control source can be moved "proportionally"
meaning it can be stopped in a number of positions.
Any deviation from the intended amount is sensed,
and corrected. As a result, a servo valve is capable
of very accurate control of fluid direction within
a system, from one port, to equal pressure, to flow
into the other port. A servo valve's signal source
can be via a simple potentiometer, an electronic
controller, or another source.

A servo valve coupled with the proper feedback sensing
device provides very accurate control of the position,
velocity, or acceleration of an actuator. They are
usually more accurate than a proportional control
valve. They are typically used to control a cylinder,
to control a hydraulic motor, or to operate the
displacement control of a variable delivery pump.

Repair Procedures:

  • Visual inspection and evaluation on test stand for
    initial comparison to manufacturer's specifications.
  • Valve is disassembled.
  • Every part is chemically cleaned with solvents.
  • Torque motor is dismantled down to wires and magnets.
  • All parts are inspected and checked to ensure they are within manufacturer's
    tolerances and specifications.
  • Failed parts are replaced with original manufacturer components.
  • Torque Motor is totally remanufactured.
  • Each magnet in the coil is re-magnetized to full strength.
  • All nozzles are adjusted.
  • Feedback wire is checked for wear and performance.
  • Motor is rewired and assembled with new Viton Seals.
  • Torque motor is then tested and calibrated to manufacturer's specifications.
  • Valve Body is inspected to ensure it is within manufacturer's tolerances.
  • Body spool assembly is checked for wear.
  • If needed the body and/or body spool assembly is replaced with new from the
    original manufacturer, assembled using new Viton seals and a new filter from the valve manufacturer.
  • The torque motor and body are reassembled, tested to 100% of specifications for flow
    and pressure established by the manufacturer.
  • Once tested to manufacturer's specifications, a test report and computer plot is included
    with the repair.

See These Links for More Info:

SERVO MOTOR BROCHURE
REPAIR PROGRAMS BROCHURE



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Paragon Technologies
Paragon Canada
Paragon Atlantic
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Paragon Brazil

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