Throttle check valve
RE 27518/10.07
Replaces: 02.03
1/8
Type Z2FS
Size 10
Component series 3X
Maximum operating pressure 315 bar [4569 psi]
Maximum flow 160 l/min [42.3 US gpm]
H5556
Table of contents
Features
Content
Page
Features
1
Ordering code
2
Symbols
2
Function, section
3
Technical data
4
Characteristic curves
5
Unit dimensions
Information on available spare parts:
www.boschrexroth.com/spc
6 to 8
– Sandwich plate valve
– Porting pattern to ISO 4401-05-04-0-05,
NFPA T3.5.1 R2 and ANSI B93-7 D05
– For limiting the main or pilot oil flow of 2 actuator ports
– 3 adjustment elements:
•Lockable rotary knob with scale
•Spindle with hexagon socket and scale
•Rotary knob with scale
– For meter-in and meter-out throttling
2/8
Bosch Rexroth AG Hydraulics
Z2FS
RD 27518/10.07
Ordering code
Z2FS 10
3X
V
Throttle check valve,
sandwich plate design
V =
= – 1)
= A
= B
Throttle check valve, sides A and B
Throttle check valve, side A
Throttle check valve, side B
Adjustment element
Lockable rotary knob with scale
Spindle with hexagon socket and scale
Rotary knob with scale
Further details in clear text
Seal material
FKM seals
(other seals on request)
Attention!
Observe compatibility of seals with hydraulic
fluid used!
= 10
Size 10
= 3 2)
= 5
= 7
No code = adjustment elements on sides A and B.
S =
Material no. R900008158, included in the scope of
supply.
S2 =
1)Identical
*
2)H-key,
Standard types and components can be found in the
EPS (standard price list).
With two throttle check valves,
meter-in or meter-out throttling
(valve can be rotated)
(…A.–3X/S) meter-in throttling on side A
(…B.–3X/S) meter-in throttling on side B
(…A.–3X/S2) meter-out throttling on side A
(…B.–3X/S2) meter-out throttling on side B
3X = Component series 30 to 39
(30 to 39: unchanged installation and connection dimensions)
Symbols (① = component side, ② = plate side)
Meter-out throttling “S2“
1
1
Variant “–“
Meter-in throttling “S“
TA P
A
2 B
TB
TA P
A
TB
1
Variant “A“
1
2 B
TA P
A
2 B
TB
TA P
A
TB
1
Variant “B“
1
2 B
TA P
A
2 B
TB
TA P
A
2 B
TB
RD 27518/10.07
Hydraulics Bosch Rexroth AG
Z2FS
3/8
Function, section
Valves of type Z2FS 10 are throttle check valves of sandwich
plate design. 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 return 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.
5
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 position, throttling can be effective in the supply or return line.
Main flow limitation
To change the velocity of an actuator (main flow limitation),
the throttle check valve must be installed between the directional valve and the subplate.
Pilot oil flow limitation
In conjunction with pilot operated directional valves, the throttle 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.
1
A
B
1
2
A
4
6
3.1
Meter-in throttling
2
B
3.2
7
4/8
Bosch Rexroth AG Hydraulics
Z2FS
RD 27518/10.07
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
Maximum flow
bar [psi] 315 [4569]
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 (synthetic esters); other hydraulic fluids on request
Hydraulic fluid temperature range
Viscosity range
°C [°F] –20 to +80 [–4 to +176]
mm2/s
Permissible max. degree of contamination of the
hydraulic fluid - cleanliness class to ISO 4406 (c)
1)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.
[SUS] 10 to 800 [60 to 3710]
Class 20/18/15 1)
RD 27518/10.07
Hydraulics Bosch Rexroth AG
Z2FS
Characteristic curves (measured with HLP46, ϑoil (
= 190 SUS)
= 40 °C ± 5 °C [104 °F ± 9 °F])
∆p-qV characteristic curves (via check valve)
Pressure differential
in bar [psi] →
[116]
8
[100]
[80]
[60]
[40]
[20]
[0]
1
6
2
4
2
1 Throttle closed
0
[0]
20
40
[5]
[10]
60
[15]
80
[20]
100
[25]
120
[30]
140
[35]
160
2 Throttle open
[42.3]
Flow in l/min [US gpm] →
[2611]
180
[2176]
150
[1450]
100
3
4 5
6 6,5
7
7,5
8
8,5
9
9,5
10
[725]
50
[145]
[72.5]
10
5
[14.5]
1
[0]
0
[0]
10,5
11
11,5
20
40
[5]
[10]
60
[15]
80
[20]
100
[25]
Flow in l/min [US gpm] →
120
[30]
140
[35]
160
[42.3]
Throttling position in turns
Pressure differential in bar [psi] →
∆p-qV characteristic curves (constant throttling position)
5/8
6/8
Bosch Rexroth AG Hydraulics
Z2FS
RD 27518/10.07
Unit dimensions: Variant “–“ (dimensions in mm)
3; 4
3; 4
[0.79]
[ 1.26]
32
0
9 8
2 1
3
3
0
32
2 1
9 8
[ 1.26]
306 [12.05]
345 [13.58]
20
[0.79]
1
9
48,5 [1.91]
9
20
153 [6.02]
160 [6.3]
184 [7.24]
70 [2.76]
1,5
80 x 70 [3.15 x 2.76]
2
[0.059]
7
4 x 6,7 [ 0.264]
5 x 16 [ 0.63]
6
A
TB
F4
F3
“X”
5
4 x 6,7 [ 0.264]
10
F2
B
TA
8
Attention!
If bores are required for X- and Y-port (e.g. for pilot operated
directional valve size 10) variant SO30 must be selected!
For explanations of items and valve mounting screws,
see page 8.
[0.5]
“X”
P
12,7
49,5 [1.95]
40 [1.58]
12
[0.47]
88 [3.47]
F1
2
[0.079]
10 [ 0.394]
8 (A, B) [ 0.315]
7,5 (TA, TB) [ 0.295]
0,01/100
[0.0004/4.0]
Rzmax 4
Required surface quality of the
valve mounting face
RD 27518/10.07
Hydraulics Bosch Rexroth AG
Z2FS
7/8
Unit dimensions: Variants “A“ and “B“ (dimensions in mm)
252 [9.92]
225 [4.53]
20
1
7
4 x 6,7 [ 0.264]
[0.059]
3; 4
1,5
3
21 0 98
9
9
5 x 16 [ 0.63]
80 x 70 [3.15 x 2.76]
6
80 x 70 [3.15 x 2.76]
5 x 16 [ 0.63]
2
12,7
49,5 [1.95]
70 [2.76]
A
TA
B
TB
40 [1.58]
P
12
[0.47]
184 [7.24]
165 [6.5]
156,5 [6.16]
165 [6.5]
156,5 [6.16]
88 [3.47]
6
[0.5]
4 x 6,7 [ 0.264]
3; 4
[0.059]
1,5
153 [6.02]
7
10 [ 0.394]
8 (A, B) [ 0.315]
5
4 x 6,7 [ 0.264]
10
Attention!
If bores are required for X- and Y-port (e.g. for pilot operated
directional valve size 10) variant SO30 must be selected!
For explanations of items and valve mounting screws,
see page 8.
20
[0.79]
32
48,5 [1.91]
3
21 0 98
252 [9.92]
225 [4.53]
7,5 (TA, TB)[ 0.295]
0,01/100
[0.0004/4.0]
Rzmax 4
Required surface quality of the
valve mounting face
[ 1.26]
[0.79]
8/8
Bosch Rexroth AG Hydraulics
Z2FS
RD 27518/10.07
Unit dimensions
1 Nameplate
2 Adjustment element “5“
Spindle for adjusting the flow cross-section (hexagon
socket 8 A/F)
• Turning counter-clockwise = larger flow
• Turning clockwise = smaller flow
3 Adjustment element “3“
4 Adjustment element “7“
Valve mounting screws (separate order)
4 hexagon socket head cap screws ISO 4762 - M6 - 10.9
4 hexagon socket head cap screws 1/4-20 UNC
Note!
The length and tightening torque of the valve mounting
screws must be calculated taking account of the components
mounted above and below the sandwich plate valve.
5 4 through-bores for valve mounting
6 Identical seal rings for ports A, B, P, TA, TB
7 R-ring plate
8 To change over from meter-in to meter-out throttling,
turn the device about the axis “X“–“X“ (only with variant “–“)
9 Space required to remove key
10 Porting pattern to ISO 4401-05-04-0-05,
NFPA T3.5.1 R2 and ANSI B93-7 D05
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
[email protected]
www.boschrexroth.de
© This document, as well as the data, specifications and other information 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.