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Parker Hannifin GmbH Hydraulic Controls Division Gutenbergstraße 38 D-41564 Kaarst, Germany Phone:+49 - 21 31/5 13-0 Fax: +49 - 21 31/5 13-230

Only for internal use!

Subject: Prop. DC valves To: Distribution list A+B D1FP*S Extension of valve series

Contact: H. Pape Date: August 06, 2004 Extension: -379 Fax: -390 E-mail: Holger.Pape@parker.com Product Line: FGJ

Dear Madams and Sirs, HCD presents another enhancement of the revolutionary valve series DFplus® with patented VCD® (“Voice Coil Drive”) technology: D1FP*S comes with a new valve body with mounting pattern size 04 acc. to ISO 10372. It allows easy replacement of common servovalves of that size, e.g. Moog D760, D761 and D765. A special adapter plate is no longer neccesary. At a list price of 2499 € you now have at your disposal an additional, interesting alternative in price and technology. Of course this valve comes with all the advantages of the DFplus® series like superior positioning, excellent resolution and ultra fast response times.

Product Comparison

Parker D1FP*S Servoventil e.g. Moog 765 (Standard) Leakage (210bar) <0.6 l/min 1,5-2.3 l/min Pilot oil not needed needed Step response <3.5ms 4ms

Sensitivity against dirt low high

(in consequence of nozzle flapper principle) Robustness high

(like solenoid valves) medium

(in consequence of nozzle flapper principle)

Cost of ownership no amount of maintenance regular maintenance Dynamic behaviour independent of sytem

pressure dependent of pilot pressure

List price 2499 EURO approx.. 4500 EURO DFplus® opens new market segments and potentials in machine testing, simulation technology, hydraulic presses, power generation, plastics industry and machine tools etc. Actually D1FP*S size 04 with mounting pattern ISO 10372 is released for all mineral oils. For technical data and ordering code see pages 2 and 3. With kind regards H. Pape H. Kolvenbach T. Höbel (Product Sales Mgr.) (Engineering Mgr.) (Marketing Mgr.)

Ordering Code:

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Technical Data:

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Proportional ValveSeries DFplus

Breakthrough in PropDFplus, the low-cost alternative to “genuine“ servo valves

There is a new generation of proportional directionalvalves: the series DFplus® from Parker with VCD® drivetechnology. Unique in the market, the DFplus® valvereaches 400Hz across the entire operating range. Thisperformance was previously only achieved by servovalves.

Likewise, across the total operating range, DFplus®

valves generate a force level of over 100N and can beoperated without performance limits up to 350bar. Therobust and typical Parker quality guarantees a long ser-vice life.

For best possible transmission of force, the spool of theDFplus® series is mechanically connected to the drive.It operates bi-directionally and possesses a spool posi-tion feedback, which ensures high precision and repro-ducibility of regulated flow rates.

The new Parker DFplus® valve closes the market gapbetween proportional and servo technology. With supe-rior positioning, excellent resolution and ultra quick re-sponse time, it simultaneously revolutionizes the DF-plus® and electrohydraulic system design – available ata stable, attractive price.

DFplus – Revolution in power and dynamics

Highest dynamics for applications with exact positioning

Accurate pressure and speed control

Suitable also for high volume rates. Flow limit at 350 bar pressure drop*

Defined safety position

On-board electronics

Available for all command input signals

* per 2 metering edges

Ordering code

D F

DC valve Spool-type

Spoolpositionon powerdown 1)

1 P

Command-signal

SealNBR

(different sealcompound upon

request)

N9

Code

A2)

Spool pos. on power down

Code

BES

Signal Flow direction

0...+10V -> P-A0...+20mA -> P-A12...20mA -> P-A

+/- 10V+/- 20mA4...20mA

B2)

C3)

Code

05

Connection type

6 + PE acc. DIN 4356311 + PE acc. DIN 41651

Acces-sories

Designseries

0

1) On power down the spool moves in a defined posi-tion. In case of single flow path on the control edge A– T resp. B – T with pressure drops above 120 bar orcontamination in the hydraulic fluid, this cannot beguaranteed.

2) approx. 25% opening3) only for overlapped spools

Code

E50ME50HE50FE50CE50B

SpooltypeFlow [l/min] at ∆p 35bar

per metering edge40251263

40 / 20B60M

QB = QA /2

Zerolap

40251263

E01ME01HE01FE01CE01B

4025

E02ME02H

B31M

Overlap

40 / 20

QB = QA /2

QB = QA /2

40 / 20B32M

Code SpooltypeFlow [l/min] at ∆p 35bar

per metering edge

portional Technology

Frequency response ±5% Commandsignal*

Flow limit*

* schematics, all valves Qnom = 40 l/min

VCD® Technology

With the VCD® technology Parker has a successful break-through in the drive technology for proportional direc-tional control valves. In contrast to standard proportionalsolenoid drives, this technology will actuate the spool(1) by using a moveable coil (2). The coil is on the bodyside connected with the spool and goes on the actuatorside over a permanent magnetic cylinder (3). At energiz-ing of the coil, the spool will be moved actively in thedesired position depending on direction of current flow.The actual position is sent back over a high resolutionfeedback system to the control electronics. At power fail-

ure, the valve will be driven by a spring to a definedposition.

Advantages compared to traditional drives:

• No active return spring required High actuatingforce/dynamics

• Low moved masses by high force density Highactuating force/dynamics

• No additional bearing in actuator Low friction/hysteresis