1/2
A-VBSO-SE-FA-42 08.45.38 - X - Y - Z
Single counterbalance
with brake release port for winches,
flangeable
When pressure at V2 rises above the spring bias pressure, the check
seat is pushed away from the piston and flow is allowed from V2 to
C2. When load pressure at C2 rises above the pressure setting, the
direct operated, differential area, relief function is activated and flow
is relieved from C2 to V2. With pilot pressure at P, the pressure setting
is reduced in proportion to the stated ratio of the valve, until opening
and allowing flow from C2 to V2. The spring chamber is drained to V2,
and any back-pressure at V2 is additive to the pressure setting in all
functions. Through port C3, an incorporated shuttle valve directs either
P or V2 line pressure to the spring actuated brake for brake opening.
Description
Performance
RE 18308-42/05.13
Replaces: RE 18308-42/07.12
Technical data
Hydraulic
Max. operating pressure bar (psi) 350 (5000)
Max. flow l/min (gpm)
350 (93)
The high pilot ratio (13:1) has been developed for energy saving; for higher
stability at all flows and pressures, the pilot line includes hydraulic damping.
The C2 port is designed with “SAE flange” pattern in order to be gasket
mounted directly to the motor.
Relief setting: at least 1.3 times the highest expected load. In addition, both
the relief setting and the pilot ratio must be determined also in order to
achieve building-up of pilot pressure in P high enough to release the
brake prior to any valve opening from C2 to V2.
General
Manifold material Steel
Weight see “Dimensions”
Fluid temperature range °C (°F) between -30 (-22) and +100 (212)
Other technical data see data sheet RE 18350-50
Note: for applications outside these parameters, please consult us.
084538XYZ RE 18308-42/05.13
2/2 Bosch Rexroth Oil Control S.p.A.
Bosch Rexroth Oil Control S.p.A.
Via Leonardo da Vinci 5
P.O. Box no. 5
41015 Nonantola – Modena, Italy
Tel. +39 059 887 611
Fax +39 059 547 848
motion-control-valves@oilcontrol.com
www.boschrexroth.com
© This document, as well as the data, specifications 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 specified 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
verification. It must be remembered that our products are subject to a
natural process of wear and aging.
Subject to change.
Single counterbalance
with brake release port for winches,
flangeable
SPRINGS
Adj. pressure
range
bar (psi)
Pres. increase
bar/turn
(psi/turn)
Std. setting
Q=5 (l/min.)
bar (psi)
Pilot ratio
= 13 13:1
= 35
250-500
(3625-7250)
102
(1479)
500
(7250)
Port sizes V2-C2 C3-P
= 72 3/4 SAE6000 G 1/4
= 73 1 SAE6000 G 1/4
= 64
1-1/4
SAE6000
G 1/4
Type Material number
08453813723500D R930007254
08453813733500F R930007251
08453813643500D R930007253
Type Material number
Dimensions
Ordering code
08.45.38 X Y Z
