The proven 2-way proportional throttle valves series TDA feature a precise control of large oil flows for an efficient, reliable operation.
Parker 2-way proportional throttle valves
series TDA provide outstanding characteristics like high resolution
and reproducibility as well as a favourable price/performance ratio
for a reliable and cost-effective operation. The TDA valve is used
to control large oil flows. In combination with the digital power
amplifier PCD00A-400 the valve parameters can be saved, changed and
duplicated.
Markets:
• Industrial
• Molding
Features/Benefits:
• Proven, very robust design with cavity and mounting pattern
according to ISO 7368 - allows reliable operation
• 8 sizes NG16 up to NG100 - wide range of sizes, fits most
hydraulic systems
• Requires less pilot oil - enables higher energy efficiency
• High resolution and reproducibility - for improved product
accuracy
• Short delivery time - no warehousing necessary
• Fail-safe function at power failure
• Leak-free from port B to A
• Pressure differential up to 350 bar possible
Applications:
• General presses
• Die cast
• Injection molding
Technical functionality:
The TDA valve has a 3-stage design consisting of the first solenoid
operated pilot stage with a spool in sleeve design, the second pilot
stage with the control pring and the sequence spool and as main
stage the poppet in the sleeve. The proportional solenoid operates
the pilot spool against the feedback of the control spring and
controls the position of the sequence spool. The main poppet follows
the position of the sequence spool and provides an open area for
flow from B to A (optional A to B) in proportion to the solenoid
current. The poppet is positioned independently of the differential
pressure, which can become as high as the maximum working pressure.