Pub.ELH-1314-2
Living with Hydraulics

High precision feedback control achieved due to main vavle position sensor
OBE Type Proportional Electro-Hydraulic
Directional and Flow Control Valves(with Main Valve Feedback Control)

Features

簡単SimplerHigh Accuracy

・On-Board Electronics simplifies wiring
・Only with 24 V DC power supply andcommand signal input
・Hysteresis : 0.5 % or less

Safety・Fail-safe features ensure work safety
and eliminate risks from electricalproblems such as power outages etc

High Flow・Significantly increased flow ratecompared to current products

Specifications
Model Numbers

ECDFHG-04EH-150

ECDFHG-04EH-200

3C21(P→B, B→T)︓120
3C22(P→A, A→T)

ECDFHG-06EH-350

ECDFHG-06EH-500

3C21(P→B, B→T)︓230
3C22(P→A, A→T)

Rated Flow
[ΔP=1 MPa (4-Way Valve)]
ΔP = 0.5 MPa per Land

L/min

Max. Operating PressureMPa3531.5

Pilot PressureMPa

2.5 - 35

2.5 - 31.5

L/min

5.5

7.5

★1

Pilot Flow Rate★2

3C2, 3C40︓200

3C2, 3C40
3C21(P→A, A→T) ︓150
3C22(P→B, B→T)

External Drain T PortMPa
Proof Pres.
at Return External Drain Y PortMPa
Port ★3
Internal Drain T&Y Port MPa

3C2, 3C40︓500

3C2, 3C40
3C21(P→A, A→T) ︓350
3C22(P→B, B→T)

31.5

25

1 or less1 or less1 or less
1.2 or less

Pilot Valve

L/min

Main Valve

L/min

Step Response (0 → 100%)★5ms3845

Phase: -90°

Hz26

24

Gain: -3 dB

Hz30

27

Internal Leakage★4Frequency Response±25% Amplitude ★5

3C2, 3C21, 3C22 : 1.0 or less

3C2 : 1.4 or less

3C2, 3C21, 3C22 : 1.5 or less

3C40 : 2.0 or less

3C40 : 1.4 or less3C40 : 2.8 or less

3C40 : 2.0 or less

3C40 : 4.0 or less

Hysteresis

0.5% or lessRepeatability

0.5% or lessPower Supply

21.6 - 26.4 V DC Included Ripple

Current

A2 (Impulse Loud 3)

Power Input

VA75

Coil Resistance at 20 ºCΩ

4.6

Input Signal±10V, 4 - 20 mA, ±10 mA

Electric Connection

6 + PE Connector [EN 175201 Part 804]
Equivalent to IP64

Protection
Approx. Mass

kg1321★1. Pilot pressure should be between 2.5 MPa and 35 MPa (04EH), 2.5 MPa and 31.5 MPa (06EH), and should exceed 60% of the actual supply pressure to main valve.
★2. Pilot flow is calculated with the above step response time at pilot pressure 3 MPa.
★3. Return pressure should be less than the actual supply pressure.
★4. This value is measured at a supply pressure of 14 MPa, pilot pressure of 14 MPa, and viscosity of 30 mm2/s;
it may vary depending on the actual circuit/operation conditions.
★5. This value is measured for each valve based a pilot pressure of 14 MPa; it may vary depending on the actual circuit/operation conditions.

Pub.ELH-1314-2
Living with Hydraulics

Model number designation
ECDFHG - 04
SeriesNumberEH

Valve AmplifierSize
Type04★

ECDFHG︓
Proportional
ElectroHydraulic
Directional
and FlowControl
Valves(with MainValve
06FeedbackControl)- 150
Rated Flow
L/min

ΔP= 1 MPa
(4-Way Valve)- 3C2- XY-E

T-C

Spool Type

Directionof Flow

Pilot
Type

DrainTypeFail-Safe
Function

150︓150 L/min

3C2
3C40
3C21
3C22

200︓200 L/min

3C2
3C40

EH︓OBEType
350︓350 L/min

500︓500 L/min

None：
Internal
Pilot

XY︓Meter-In/Meter-Out

3C23C40
3C21
3C22- 10Input Signal/ Design
Spool Travel Number
Monitoring
D︓
Voltage Signal± 10 V(PABT Flowwith Positive
Input)

None：
External
Drain
C︓Neutral

E︓
External
Pilot

-D

T︓
Internal
Drain

E︓
Current Signal
4 to 20 mA(PABT Flowwith 12 to 20
mA Input)10

F︓
Current Signal± 10 mA(PABT Flowwith Positive
Input)

3C2
3C40★Phosphate ester type fluids are also supported. When phosphate ester type fluids are used, prefix “F-” to the model number because the special seals(fluororubber) are required to be used.

Details of the valve fail-safe functions
With reference to the information given below, select the option for the fail-safe function according to the use ofapplications. A separate safety circuit should be provided if the hydraulic actuator must be reliably held or stopped.
Fail-Safe Function★

No.

Model Numbers

1

ECDFHG-＊EH-＊-3C2-XY-＊＊-C
ECDFHG-＊EH-＊-3C21-XY-＊＊-C
ECDFHG-＊EH-＊-3C22-XY-＊＊-C

2

ECDFHG-＊EH-＊-3C40-XY-＊＊-C

FunctionSpool Position

All Ports Blocked

NeutralA, B, T Connection★The fail-safe function’s activation time depends on the electric and hydraulic conditions.

● Electrical specifications

Input Signal
Pin AFEAD

Pin B
BC

Voltage Signal “D”

Current Signal “E“

Current Signal “F“

24 V DC (21.6 - 26.4 V DC Included Ripple), 75 VA or morePower Supply

0VCOM（0 V）

Pin C

Signal Common

Pin D

Input (＋)(Differential)★1

Pin E

Input (ー)(Differential)

Pin F

Spool Travel Monitoring

Pin

Protective Earth★1

0 - ±10 V
R i ≧50 kΩ

4 - 20 mA
R i =200 Ω

0 - ±10 mA
R i =200 Ω

0 - ±10 VRL≧10 kΩ

4 - 20 mA★2
RL=100 - 500 Ω―0 - ±10 mA★2
RL=100 - 500 Ω★1. Differential input signals can be used only for the valves with the voltage signal specifications of ±10V.
(ECDFHG-＊EH-＊-D)★2. The recommended load resistance is 200 Ω.

Applications (For Examples)
Injection Molding Machines

Yuken Group Company

Blow Molding Machines

Machine Tools

Distributor