Rexroth Hydraulics
Z2FS 4 1/4
RE 27 498/08.97
*
Contents
Description Page
Features 1
Ordering details 1
Symbols 2
Function, section 2
Technical data 3
Characteristic curves 3
Unit dimensions 4
RE 27 498/08.97
Replaces: 07.92
Double throttle/check valve
Type Z2FS 4
Nominal size 4
Series 1X
Maximum operating pressure 315 bar
Maximum flow 20 L/min
Type Z2FS 4 –2–1X/…
K 4942-14
Features
– Sandwich plate valve
– Porting pattern to DIN 24 340 form A,
ISO 4401 and CETOP–RP121 H
– Adjustment element:
• Socket screw with locknut
– For limiting main or pilot fluid flow of 2 actuator ports
– For meter-in or meter-out control
Ordering details
Further details in clear text
V = FPM seals
(other seals on request)
Attention!
The compatibility of the seals and pressure
fluid has to be taken into account!
1Q = With fine control
2Q = Standard version
1X = Series 10 to 19
(10 to 19: unchanged installation and connection dimensions)
Double throttle/check valve
Nominal size 4 = 4
Throttle/check valve ports A and B = –
Throttle/check valve port A = A
Throttle/check valve port B = B
Adjustment element
Screw with locknut = 2
Z2FS 4 2 –1X V
Preferred types and standard components are
highlighted in the RPS (Rexroth Price list Standard).
RE 27 498/08.97
Rexroth Hydraulics 2/4 Z2FS 4
TPAB
1
2
TPAB
1
2
TPAB
1
2
TPAB
1
2
A1
B1
A2
B2
51
43 2
Symbols (
1
= valve side,
2
= sub-plate)
Z2FS 4 –..-1X/.. (meter-out control)Z2FS 4 –..-1X/.. (meter-in control)
Z2FS 4 A..-1X/.. (meter-out) Z2FS 4 B..-1X/.. (meter-in control)
Valve type Z2FS 4 are double throttle/check valves of sandwich plate
design.
They are used to limit the main or pilot flow of one or two actuators.
Two symmetrically arranged throttle/check valves limit the flow in
one direction and allow free-flow in the oppositie direction.
For meter-in control, fluid passes from port A1 to actuator A2 via
throttling point (1), which is made up of valve seat (2) and throttling
spool (3). Throttling spool (3) may be axially adjusted via adjustment
screw (4), thus allowing throttling point (1) to be adjusted.
Fluid returning from actuator A2 moves valve seat (2) against spring
(5) in the direction of throttling spool (3) causing the valve to act as
a check valve and allowing free-flow. Depending on the installation
position, the throttling effect may be arranged as a meter-in or a
meter-out control.
In order to change the velocity of an actuator (limiting of main flow),
the double throttle/check valve is installed between the directional
valve and the sub-plate.
Type Z2FS 4 –2–1X/… (meter-in control)
Function, section
Z2FS 4 3/4 Rexroth Hydraulics
RE 27 498/08.97
2 4 6 8 10 12 14 16 18 20
1 1,5 2
2,5 3 3,5
4
4,5
5
5,5
6
6,5
7
250
200
150
100
90
80
70
60
50
40
30
20
10
5
0
02468101214161820
1
1,5
2 2,5 3 3,5 4 4,5 5
5,5
6
6,5
7
250
200
150
100
90
80
70
60
50
40
30
20
10
5
10
7,5
5
2,5
0 5 10 15 20
Characteristic curves (measured at
ν
= 41 mm
2
/s and
ϑ
= 50 °C)
Technical data (for applications outside these parameters, please consult us!)
Pressure fluid Mineral oil (HL, HLP) to DIN 51 524;
Fast bio-degradable pressure fluids to
VDMA 24 568 (also see RE 90 221); HETG (rape seed oil);
HEPG (Polyglycol); HEES (synthetic ester);
other seals on request
Pressure fluid temperature range °C – 20 to + 80 (for FPM seals)
Viscosity range mm
2
/s 10 to 800
Degree of contamination Maximum permissible degree of contamination of the fluid is to
NAS 1638 class 9. We, therefore, recommend a filter with a
minimum retention rate of ß
10
≥ 75.
Maximum working pressure bar 315
Maximum flow L/min 20
Weight kg approx. 0.5
∆p–q
V
–characteristic curves – type Z2FS 4 ..–1X/2QV
∆p–q
V
–characteristic curves – type Z2FS 4 ..–1X/1QV
Throttle setting in turns
Throttle setting in turns
Flow in L/min →
Flow in L/min →
Flow in L/min →
Pressure differential in bar →
Pressure differential in bar →
∆p–q
V
–characteristic curves across check valve (throttle closed)
Pressure differential in bar →
All rights reserved – Subject to revision 4/4 Z2FS 4
RE 27 498/08.97
Mannesmann Rexroth AG
Rexroth Hydraulics
D-97813 Lohr am Main
Jahnstraße 3-5 • D-97816 Lohr am Main
Telefon 0 93 52 / 18-0
Telefax 0 93 52 / 18-10 40 • Telex 6 89 418-0
The specified data is for product description
purposes only and may not be deemed to be
guaranteed unless expressly confirmed in the
contract.
Mannesmann Rexroth Limited
Cromwell Road, St. Neots,
Huntingdon, Cambs. PE19 2ES
Tel: (01480) 476041
Fax: (01480) 219052
0,01/100mm
R 4
max
24
±0,1
61 x 40
1,2
61 x 40
1,2
74
29
61 x 40
1,2
16
29
T
P
B
A
22,5
±0,1
36
24
±0,1
25
4 x Ø 5,5
4 x Ø 5,4
30
74 30
13,5
30
13,5
30
13,5 13,5
6,5
6,5
3
8
2 6
7
9
1
3
8
6
79
2
2
5
6
7
8
58 3
1
4
2
"X" "X"
"X"
"X"
"X" "X"
Type Z2FS 4 A..–1X/..
Type Z2FS 4 –..–1X/..
Type Z2FS 4 B..–1X/..
Unit dimensions (Dimensions in mm)
1 Name plate
2 Adjustment element "2"
(hexagon 19 A/F)
3 Adjustment screw for changing the
flow cross-section (internal hexagon
2.5 A/F)
•Turn anti-clockwise = increases flow
• Turn clockwise = decreases flow
4 Valve fixing holes
5 Locknut 8 A/F
6 R-rings 7.3 x 1.4 x 1.5
for ports A, B, P, T
7 R-ring plate
8 To change from meter-in or meter-out
control, rotate the unit about the „X“ –
„X“ axis
9 Plug
Valve fixing screws
M5 DIN 912-10.9,
tightening torque M
A
= 8.9 Nm,
must be ordered separately
Required surface finish of mating piece
