Compact Directional Valves - Non-compensated and Post-compensated - Directional elements EDB Series

EDB-P

Description

Valve element with direct proportional control of spool.

Control spools operated by solenoids with removable coils.

In the de-energized condition, the control spool is held in the central position by return springs.

Wet pin proportional tubes for DC coils, with push rod for mechanical override; nickel plated surface.

Manual override (push-button or screw type) available as option.

Size 4

Series 00

Maximum operating pressure 310 bar (4500 psi)

Maximum flow 17 l/min (4.5 gpm)

Port connections G 3/8 SAE6 - Μ16x1.5

RE18300-55-order

1) With Δp (P > T) 10 bar (145 psi), corresponding approx. to Δp P>A,B 5 bar (73 psi).

2) For connectors ordering code see data sheet RE 18325-90.


Symbols

RE18300-55-sym

Spool variants

RE18300-55-spool
RE18300-55-functional
Description

The sandwich plate design directional valve elements B8080... are compact direct operated proportional solenoid valves which control the start, the stop, the direction and the quantity of the oil flow. These elements basically consist of a stackable housing (1) with a control spool (2), one or two solenoids (5), and one or two return springs (4).

Energized by an electronic feed regulator, each solenoid (5) displaces the control spool (2) from its neutral-central position "0" proportionally to the current received, in open loop mode; a regulated oil flow Ρ to A , or Ρ to B, is achieved. Once the solenoid is de-energized, the return spring (4) pushes the spool thrust washer (3) back against the housing and the spool (2) returns in its neutral-central position "0".

Each coil is fastened to the solenoid tube (5) by a ring nut (6). A pin (7) allows to push the spool (2) in emergency conditions, when the solenoid cannot be energized, like in case of voltage shortage.

Code
Voltage [V]
Connector type
Coil description
Marking
Coil Mat no.
=OB 01
12 DC
EN 175301-803(Ex. DIN 43650)
P45 01
12 DC
R933000088
=OB 03
12 DC
AMP JUNIOR
P45 03
12 DC
R933000089
=OC 01
24 DC
EN 175301-803(Ex. DIN 43650)
P45 01
24 DC
R933000090
=OC 03
24 DC
AMP JUNIOR
P45 03
24 DC
R933000091
General:
Valve element with 2 solenoids:
  • 1.5 kg (3.3 lbs)
Valve element with 1 solenoid:
  • 1.1 kg (2.5 lbs)
Fluid Temperature:
  • -20....+50 (-4....+122) (NBR seals)
Hydraulic:
Maximum pressure at P, A and Β ports:
  • 310 bar (4500 psi)
Maximum pressure at Τ:
  • 180 bar (2610 psi)
Maximum inlet flow:
  • 24 l/min (6.3 gpm)
Ε-schemes ρ closed in the neutral position (connection from A to Τ and Β to T):
  • Approx. 2.3% of the nominal cross-section
Hydraulic fluidGeneral properties: it must have physical lubricating and chemical properties suitable for use in hydraulic systems such as, for example:
  • Mineral oil based hydraulic fluids HL (DIN 51524 part 1). For use of environmentally acceptable fluids (vegetable or polyglycol base) please consult us.
Fluid Temperature:
  • -20....+80 °C (-4....+176 °F) (NBR seals)
Permissible degree of fluid contamination:
  • ISO 4572: βₓ≥75 Χ=10...12 NAS 1638: class 8
Viscosity range:
  • 20....380 mm²/s (optimal 30....46)
Electrical:
Voltage type:
  • 120 Hz PWM
Voltage tolerance (nominal voltage):
  • -10.... +10 %
Duty:
  • Continuous, with ambient temperature < 50°C (122°F)
Coil wire temperature not to be exceeded:
  • 180 °C (356 °F)
Insulation class:
  • Η
Compliance with:
  • Low Voltage Directive LVD 73/23/EC (2006/95/EC), 2004/108/EC
Coil weight:
  • 0.228 kg (0.503 lbs)
Voltage:
  • 12 V
  • 24 V
Nominal 100% current:
  • 1.76 A
  • 0.94 A
Coil resistance (nominal at 20°C (68°F)):
  • 3.71 Ω - Cold value
  • 13 Ω - Cold value
  • 6.1 Ω - Max. hot value
  • 22.9 Ω - Max. hot value
Electronic control:
Electronic feed regulators 3):
  • Note: 1) An electronic, open loop type, regulator with plug-in pins EN 175301-803 is available and can be fitted onto the solenoid directly. For valve elements with two solenoids, two electronic regulators are needed.
  • Note: For applications with different specifications consult us
  • Upon request

Ordering code S3: 4 l/min (1.06 gpm) with Δp 5 bar (73 psi) P>A,B.

RE18300-55-order-code1

Ordering code S4: 9 l/min (2.38 gpm) with Δp 5 bar (73 psi) P>A,B.

RE18300-55-order-code2

Ordering code S5: 17 l/min (4.50 gpm) with Δp 5 bar (73 psi) P>A,B.

RE18300-55-order-code3
Δp= valve pressure differential (inlet pressure Pp minus load PI and minus return pressure Pt).
RE18300-55-dim
1
Solenoid tube 0 19 mm (0.75 inch).
2
Ring nut for coil locking 0 30 mm (1.18 In); torque 6–7 Nm (4.4 – 5.2 ft-lb).
3
Identification label.
4
Dimension with electronic feed regulator.
5
Clearance needed for connector removal.
6
Optional screw type manual override, EF type, for spool opening:it is screwed (torque 6-7 (4.4-5.2 ft-lb)) to the tube as replacement of the coil ring nut.Mat no. R933003848.
7
Flange specifications for coupling to ED intermediate elements.
8
For tie rod and tightening torque information see data sheet RE 18301-90.
9
A and Β ports.
RE18300-55-elc

RE18300-55-elc-feed

Supply: yellow LED, lit up with power ON.

Off Set: minimum current adjustment. Adjust solenoid current so that the desired minimum value is obtained. Clockwise rotation increases current.

Ramp up: Ramping up time adjustment.

Ramp down: Ramping down time adjustment.

For longer ramping times, turn potentiometers clockwise; for shorter ramping times, turn the potentiometers counter-clockwise.

Full load current: Maximum current adjustment. Adjust solenoid current so that the desired maximum value is obtained (up to 2A). Clockwise rotation increases current.

Frequency adjustment: it is possible to set the PWM frequency obtaining the desired control sensitivity. After removing the external plastic cover, turn the adjusting screw; clockwise rotation increases frequency from 100 to 500 Hz.

Electronic feed regulator
Regulator ordering code
R933003290
Supply voltage
12-30 VDC
Control Signal
0-10 VDC
Max. output current
2 A
Minimum output current
0....0.6 A
Ramp adjustment up/down
0.1....10 s
PWM Frequency adjustment (pre-set 120 Hz)
100....500 Hz
Ambient operating temperature
-10....+60°C (14....+140 °F)
Weight
0.12 kg (26.4 lbs)
Electromagnetic compatibility
EN50081-1/2EN61000-4-2/3/4/5/6
Potentiometer resistance
5....10 κ Ω