April.2003

1
ELDFHG Series High Response Type
ProportionalElectro-Hydraulic Directional and
Flow Control Valves
ELDFG-01/03(1/8,3/8) ELDFHG-04/06 (1/2,3/4)
Sub-plate Mounting
ELDFHG-0406

• April.2003
• YUKEN KOGYO CO.,LTD.

2
Outline

• ELDFG/ELDFHG Series high response type
  proportional electro-hydraulic directional and
  flow control valves have high response
  characteristics by employing closed loop control
  system. Especially, the valves of zero-lap type
  (spool type3C2P) are suitable for position
  control or pressure control.

ELDFHG-0406
ELDFHG-03
ELDFHG-01
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Features

• ?High response characteristics equivalent to
  servo valves
• ELDFG-01 48 Hz/-90(25 Amplitude)
• ELDFHG-0666 Hz/-90(25 Amplitude)
• ? Excellent anti-contamination characteristics
• Troubles caused by contaminant in oil
  can be
• reduced as the valves are superior in
  anti-
• contamination to nozzle-flapper type
  servo
• valves.

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Line up
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Specifications ELDFG-0103
Note 1) The above characteristics were measured
with each valve so they may vary depend upon
hydraulic circuit of actual machine.
6
Specifications LSVHG-0406
Note 1) The above characteristics were measured
with each valve so they may vary depend upon
hydraulic circuit of actual machine.
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Structure
ELDFG-03
ELDFHG-04
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Model Number Designation
9
Dimensions
ELDFG-01/03
ELDFHG-04/06
C
C
D
D
B
B
A
A
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Power Amplifier
These power amplifier are compact and lighten
used to drive 10O series proportional
electro-hydraulic control valves.
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Power Amplifier
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Performance data
Flow gain
Pressure gain
ltTest conditiongt Hydraulic oilISO VG46
Temperature 505? Oil viscosity 30mm2/s
ELDFHG-04

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Performance data
Flow characteristics
ELDFHG-04
ltTest conditiongt Hydraulic oilISO VG46
Temperature 505? Oil viscosity 30mm2/s
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Performance data
Step response
ELDFHG-04
ltTest conditiongt Hydraulic oilISO VG46
Temperature 505? Oil viscosity 30mm2/s
FlowP?B?A?T (0?100)
FlowP?A?B?T (0?-100)
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Performance data
Frequency response
Pressure14MPa Pilot pressure 14MPa Spool stroke
25 Circuit diagram AB Port Closed
ELDFHG-04
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Applications

• Injection Molding Machine
• High Speed Nibbling Machine
• Die Casting Machine
• Steel Mill Equipment
• Testing Equipment
• Simulator

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End Cover

• Doc.No.PPD.2799
• Compiled by YUKEN Product Planning Section
• Date of issue4/08/2003
• Reference Publication
• Pub.No EL-1306
• Title ELDF(H)G proportional directional and
  flow control valves
• Date of issue 11/28/2002

• ALA Industries Limited.
• 1150 Southpoint Drive, Suite D
• Valparaiso, IN 46385
• Tel [phone], Fax [phone]
• www,yuken-usa.com

• YUKEN KOGYO CO., LTD.
• International Business Department
• 1 Miyamae, Fujisawa, Kanagawa Prefecture,
  251-8525 Japan
• Telephone[phone] Facsimile81-466-27-71
  00
• e-mailint.bd_at_yuken.co.jp Internetwww.yuken.co.
  jp