Page 6 - Industrial_EN

APPLICATION TEXTILE MACHINE

Hydraulic components for textile machines are expected to function perfectly over the en-
tire service life of the installation. They manage the controlled starting and braking of the
heavy yarn winding machine and continuously monitor the thread tension. These tasks
are critical, because if one of the strands breaks, the entire machine and thus part of the
production process comes to a standstill.

FUNCTION
To keep the thread tension constant, hydraulic pressures are
controlled in the tenths of a bar. To accomplish this, pulsed
PWM poppet valves are sometimes used. With the aid of am-
plifier electronics, they take over the pressure control with low
energy loss. For other applications, fast proportional pressure
reducing valves with low hydraulic power loss are used. Since
such hydraulic systems often run in accumulator unloading
operation, low-leakage valves are of great importance. The
electronics as a stand-alone or on-board version provides an
optimal addition to the unit to ensure 24/7 operation.

COMPONENTS
Proportional pressure reducing valves of size M16 are usual-
ly used to control small volume flows. These relatively small
valves are characterised by their sensitive behaviour and low
leakage. For the actuation of the larger control cylinders, the
directly controlled proportional pressure control cartridge with
the type designation MPPPM22 can be used, for example,
whereas small, slightly modified NG3 poppet valves are used
for a pulsed PWM solution.

SPECIALITIES
• Valves for special fluids
• Customer-specific valves and system solutions
• Valves with integrated and parameterised electronics
• Very low leakage values for pressure control valves, < 50 ml/min

PAGE 4 | WANDFLUH INDUSTRIAL | APPLICATION | TEXTILE MACHINE