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Information on available spare parts:
www.boschrexroth.com/spc
Throttle check valve,
seawater-resistant
Type Z2FS…J
Size 10
Component series 3X
Maximum operating pressure 315 bar [4569 psi]
Maximum flow 160 l/min [42.3 US gpm]
RE 27518-M/01.08
Replaces: 09.00
Table of contents Features
– Sandwich plate valve
– Porting pattern to ISO 4401-05-04-0-05 and
NFPA T3.5.1 R2
– Outer parts made of metal; housing and plug screws galva-
nized
– Adjustment element:
Spindle with hexagon socket
– Adjustment element corrosion-protected by a cap
– For limiting the main or pilot flow of 2 actuator ports
– For meter-in or meter-out throttling
Content Page
Features 1
Ordering code 2
Symbols 2
Function, section 3
Technical data 4
Characteristic curves 5
Unit dimensions 6
tb0208
Inhalt
Table of contents 1
Features 1
Ordering code 2
Symbols (① = valve side, ② = subplate side) 2
Function, section 3
Technical data (for applications outside these parameters,
please consult us!) 4
Characteristic curves (measured with HLP46, ϑ
oil ( = 190 SUS)
=
40 °C ± 5 °C [104 °F ± 9 °F]) 5
Unit dimensions (dimensions in mm [inch]) 6
Notes 7
Notes 8
2/8 Bosch Rexroth AG Hydraulics Z2FS…J RE 27518-M/01.08
Ordering code
Throttle check valve,
sandwich plate design
Size 10 = 10
Throttle check valve, side A and B = –
1)
Adjustment element
Spindle with hexagon socket = 5
Component series 30 to 39 = 3X
(30 to 39: unchanged installation and connection dimensions)
Further details in clear text
Seal material
V = FKM seals
(other seals on request)
Attention!
Observe compatibility of seals with hy-
draulic fluid used!
J = Seawater-resistant
No code = With two throttle check valves,
meter-in or meter-out throttling
(valve can be turned)
Z2FS 10 – 5 3X J V
*
1)
Identical adjustment elements on sides A and B.
Symbols (① = valve side, ② = subplate side)
Meter-in throttling Meter-out throttling
TA TBPAB
1
2
TA TBPAB
1
2
AB
AB
1
2
14
6
3.1
2
3.2 7
5
8
9
Hydraulics Bosch Rexroth AGRE 27518-M/01.08 Z2FS…J
3/8
Function, section
Main flow limitation
To change the velocity of an actuator (main flow limitation),
the throttle check valve must be installed between the direc-
tional valve and the subplate.
Pilot oil flow limitation
In conjunction with pilot operated directional valves, the throt-
tle check valve can be used for adjusting the actuating time
(pilot oil flow limitation). In this case, it is installed between
the pilot and the main valve.
Attention!
For adjusting spindle (4) only the plug screw (8) may be loos-
ened. Cover (9) must not be removed! The maximum torque
of 40 Nm of spindle (4) must not be exceeded!
Valves of type Z2FS 10…J are throttle check valves of sand-
wich plate design in a seawater-resistant variant. They are
used to limit the main or pilot oil flow of one or two actuator
ports.
Two throttle check valves, which are arranged symmetrically
to each other, limit flows in one direction and allow a free re-
turn flow in the opposite direction.
With meter-in throttling, hydraulic fluid flows through channel
A1 via throttling point (1), which is formed by control land (2)
and throttling spool (3.1), to actuator A2. Throttling spool (3.1)
can be axially adjusted by means of spindle (4), thus allowing
throttling point (1) to be adjusted.
At the same time, hydraulic fluid present in channel A1 flows
through bore (5) to the opposite spool side (6). Together with
the spring force, the pressure applied holds throttling spool
(3.1) in the throttling position.
The hydraulic fluid returning from actuator B2 shifts throttling
spool (3.2) against spring (7), thus allowing an unrestricted
flow like with a check valve. Depending on the installation po-
sition, throttling can be effective in the supply or return line.
Meter-in throttling
4/8 Bosch Rexroth AG Hydraulics Z2FS…J RE 27518-M/01.08
Technical data (for applications outside these parameters, please consult us!)
General
Weight
kg [lbs] ca. 3.1 [6.8]
Installation position Optional
Ambient temperature range
°C [°F] –20 to +80 [–4 to +176]
Hydraulic
Maximum operating pressure
bar [psi] 315 [4569]
Maximum flow
l/min [US gpm] 160 [42.2]
Hydraulic fluid Mineral oil (HL, HLP) to DIN 51524; fast bio-degradable
hydraulic fluids to VDMA 24568 (see also RE 90221);
HETG (rape seed oil); HEPG (polyglycols); HEES (syn-
thetic esters); other hydraulic fluids on request
Hydraulic fluid temperature range
°C [°F] –20 to +80 [–4 to +176]
Viscosity range
mm
2
/s [SUS] 10 to 800 [60 to 3710]
Permissible max. degree of contamination of the
hydraulic fluid - cleanliness class to ISO 4406 (c)
Class 20/18/15
1)
3)
The cleanliness classes specified for components must be
adhered to in hydraulic systems. Effective filtration prevents
malfunction and, at the same time, prolongs the service life
of components.
For the selection of filters, see data sheets RE 50070,
RE 50076, RE 50081, RE 50086, RE 50087 and RE 50088.
8
6
4
2
020406080 100 120
2
1
140 160
[0]
[20]
[100]
[116]
[5]
[0]
[10] [15] [20] [25] [30] [42.3][35]
[40]
[60]
[80]
0204060 100 120 140 160
[5]
[0]
[10] [15] [20] [25] [30] [42.3][35]
[0]
[14.5]
[2176]
[2611]
[72.5]
[145]
[1450]
180
100
150
50
10
5
1
80
34566,5 7 7,5 8 8,5 9
9,5
10
10,5
11
11,5
[725]
Hydraulics Bosch Rexroth AGRE 27518-M/01.08 Z2FS…J
5/8
1 Throttle closed
2 Throttle open
∆p-q
V
characteristic curves (via check valve)
Characteristic curves (measured with HLP46, ϑ
oil ( = 190 SUS)
= 40 °C ± 5 °C [104 °F ± 9 °F])
Pressure differential in bar [psi] →
Flow in l/min [US gpm] →
∆p-q
V
characteristic curves (throttle position constant)
Pressure differential in bar [psi] →
Flow in l/min [US gpm] →
Throttle position in turns
0,01/100
[0.0004/4.0]
Rzmax 4
203
153
70
48,5
1
[6.02]
[7.99]
[1.91]
[2.76]
“X”
“X”
40
12,7
10
8 (A, B)
7,5 (TA, TB)
4 x 6,7
TA
TB
AB
P
88
58
[3.47]
F1
F2
F3
F4
[1.58]
[0.5]
[ 0.394]
[
0.315]
[
0.295][ 0.264]
10
2 4
9
3
2
49,5
12
[0.079]
1,5
4 x 6,7
5 x 16
7
6
[ 0.264]
[0.059]
[ 0.63]
80 x 70
[3.15 x 2.76]
[1.95]
[0.47]
6/8 Bosch Rexroth AG Hydraulics Z2FS…J RE 27518-M/01.08
Unit dimensions (dimensions in mm [inch])
Required surface quality
of valve mounting face
1 Nameplate
2 Adjustment element “5“
Spindle for adjusting the flow cross-section (hexagon
socket 8A/F; maximum torque 40 Nm)
• Loosen plug screw (9)
• Turning counter-clockwise = larger flow
• Turning clockwise = smaller flow
Attention!
For adjusting the spindle, only plug screw (9) may be
loosened. Cover (3) must not be removed!
3 Cover
4 4 hexagon socket head cap screws
5 4 through-bores for valve mounting
6 Identical seal rings for ports A, B, P, TA, TB
7 R-ring plate
8 The conversion from meter-in into meter-out throttling
can be accomplished by turning the valve around the
axis “X“–“X“
9 Plug screw
10 Porting pattern to ISO 4401-05-04-0-05 and
NFPA T3.5.1 R2
Valve mounting screws (separate order)
4 hexagon socket head cap screws
ISO 4762 - M6 - 10.9-flZn-240h-L
4 hexagon socket head cap screws UNC on request
Note!
The length and tightening torque of valve mounting screws
must be calculated taking into account the components
mounted below and above the sandwich plate valve.
Attention!
If bores are required for X- and Y-port (e.g. for pilot operated
directional valve size 10) variant SO30 must be selected!
Hydraulics Bosch Rexroth AGRE 27518-M/01.08 Z2FS…J
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Notes
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone +49 (0) 93 52 / 18-0
Fax +49 (0) 93 52 / 18-23 58
documentation@boschrexroth.de
www.boschrexroth.de
© This document, as well as the data, specifications and other informa-
tion set forth in it, are the exclusive property of Bosch Rexroth AG. 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.
8/8 Bosch Rexroth AG Hydraulics Z2FS…J RE 27518-M/01.08
Notes
