RE 18301-40/02.2016, Bosch Rexroth AG
Flangeable elements
EDM-VR
RE 18301-40
Edition: 02.2016
Replaces: 07.12
Flangeable elements
with single or double acting
Cross Piloted Check Valves
RE 18301-40
Edition: 02.2016
Replaces: 07.2012EDM-VR
Description
The secondary fl angeable elements EDM-VR-__ can be
interfaced and bolted on top of the A and B ports of the ED
elements of the Directional Valve Assembly.
They incorporate two Cross Piloted Check Valves which
allow free fl ow toward the A and B outlet ports, and lock in a
leak free mode the fl ow returning from the actuator, until
suffi cient pilot pressure is built up in the opposite line and
the check valve is opened.
Depending on the version selected (AB, or 0A, or 0B), the
PO Check Valve is in both A and B ports, or in A port only, or
in B port only (see hydraulic symbols).
The Pilot Ratio is 4:1, consequently, the pilot pressure needs
to be at least 1/4, or 25% of the load induced pressure in the
actuator before the Check Valve opens, and oil can return to
tank.
The body of the EDM-VR- elements is made of Black
Anodized Aluminium (AL). Hydraulic Ports A2 and B2 are
size G 3/8.
A
4 1 A 2 B 3
B
A1 B1
Technical data
General
Weight
EDM-VR AB and A/B
kg (lbs) 0.8 (1.76)
Ambient Temperature °C (°F) –20....+50 (-4....+122)
(NBR seals)
Hydraulic
Maximum pressure bar (psi) 250 (3625)
Maximum fl ow l/min (gpm) 50 (13.2)
Hydraulic fl uid
General properties: it must have
physical lubricating and chemical
properties suitable for use in
hydraulic systems such as, for
example:
Mineral oil based hydraulic
fl uids HL (DIN 51524 part 1).
Mineral oil based hydraulic
fl uids HLP (DIN 51524 part 2).
For use of environmentally
acceptable fl uids
(vegetable or polyglycol
base) please consult us.
Fluid Temperature °C (°F) –20....+80 (-4....+176) (NBR)
Permissible degree of
fl uid contamination
ISO 4572: β
x
≥75 X=12...15
ISO 4406: class 20/18/15
NAS 1638: class 9
Viscosity range mm
2
/s 5....420
Note
For applications with different specifi cations consult us
Bosch Rexroth AG, RE 18301-40/02.2016
2 EDM-VR | Flangeable elements
Ordering details
Ordering details
01 02 03 04 05 06
L8840 000 0
Family
01 Directional Valve elements ED
L
Model
02 Flangeable element secondary valves
88
Type
03 Cross Piloted Check Valves
40
Confi guration
04 Check Valves for both A and B ports
00AB
Check Valve for port A only
000A
Check Valve for port B only
000B
Cracking Pressure
05 0.5 bar (7.3 psi)
01
4 bar (58 psi)
04
Ports
06 G 3/8 DIN 3852
0
Symbols
AB
AB
AB
0A
AB
0B
RE 18301-40/02.2016, Bosch Rexroth AG
Flangeable elements | EDM-VR
Characteristic curves
3
Characteristic curves
0 10 20 30 40 50 l/min
0 1 3 5 7 9 11 13.2 gpm
bar
20
16
12
8
4
0
psi
290
240
180
120
60
0
1
2
3
Pressure p
Flow Q
Cracking pressure Curve no.
4 bar (58 psi) free fl ow either A1 > A2 or B1 > B2 1
0.5 bar (7.3 psi) free fl ow either A1 > A2 or B1 > B2 2
Returning fl ow, fully piloted, either A2 > A1 or B2 > B1 3
Measured with hydraulic fl uid ISO-VG32 at 45° ±5 °C
(113° ±9 °F); ambient temperature 20 °C (68 °F).
4
Bosch Rexroth AG, RE 18301-40/02.2016
Bosch Rexroth Oil Control S.p.A.
Oleodinamica LC Division
Via Artigianale Sedrio, 12
42030 Vezzano sul Crostolo
Reggio Emilia - Italy
Tel. +39 0522 601 801
Fax +39 0522 606 226 / 601 802
compact-hydraulics-cdv@boschrexroth.com
www.boschrexroth.com/compacthydraulics
© This document, as well as the data, specifi cations and other information
set forth in it, are the exclusive property of Bosch Rexroth Oil Control S.p.a..
It may not be reproduced or given to third parties without its consent.
The data specifi ed above only serve to describe the product. No statements
concerning a certain condition or suitability for a certain application can be
derived from our information. The information given does not release the
user from the obligation of own judgment and verifi cation. It must be
remembered that our products are subject to a natural process of wear and
aging.
Subject to change.
EDM-VR | Flangeable elements
External dimensions and fi ttings
External dimensions and fi ttings
()()
()
()
()() ()
()
()
()
()
()
()
()
()
()
()
()
()
() ()
() ()
()
1 Four through holes Ø 5.5 mm (0.217 inch) for screws and
tightening torques see data sheet RE 18301-90.
2 A and B ports for the actuator.
3 Identifi cation label.
Dimensions [mm (inches)]
