1/8
Information on available spare parts:
www.boschrexroth.com/spc
2-way flow control valve
Type Z2FRM
RE 28164/05.11
Replaces: 02.03
Table of contents Features
– Sandwich plate valve
– Porting pattern according to DIN 24340 form A
– Porting pattern according to ISO 4401-03-02-0-05
(with locating hole)
– With 1 or 2 flow control cartridges
– Adjustment type with internal hexagon
Contents Page
Features 1
Ordering code 2
Symbols 2
Function, section 3
Technical data 4
Characteristic curves 5
Unit dimensions 6 to 8
H5379
Size 6
Component series 2X
Maximum operating pressure 315 bar
Maximum flow 32 l/min
Inhalt
Table of contents 1
Features 1
Ordering code 2
Symbols (① = component side, ② = plate side) 2
Function, section 3
Technical Data (For applications outside these parameters,
please consult us!) 4
Characteristic curves (measured with HLP46, ϑ
oil
= 40 ± 5 °C) 5
Unit dimensions: Version "A" and "B" (dimensions in mm) 6
Unit dimensions: Version "C" (dimensions in mm) 7
Unit dimensions: Version "T" (dimensions in mm) 8
2/8 Bosch Rexroth AG Hydraulics
Z2FRM RE 28164/05.11
Ordering code
Sandwich plate design
2-way flow control valve
Size 6 = 6
Flow control function (discharge control) in
Channel A = A
Channel B = B
Channel A and B = C
Channel T
1)
= T
Without closing of the pressure compensator = B
Adjustment type
With internal hexagon = 2
Further details in the plain
text
No code = Without locating hole
/60
2)
= With locating hole
Seal material
V = FKM seals
(other seals upon request)
Attention!
Observe compatibility of seals with
hydraulic fluid used!
R = with check valve
Flow
6Q = up to 6.0 l/min
32Q = up to 32.0 l/min
2X = Component series 20 to 29
(20 to 29: Unchanged installation and connection dimen-
sions)
Z 2FRM 6 B 2 2X R V
*
1)
The flow control function in channel P (supply control) re-
sults from the rotation around the longitudinal axis, see also
page 8.
2)
Locating pin ISO 8752-3x8-St,
Material no. R900005694 (separate order)
Symbols (① = component side, ② = plate side)
Standard types and standard units are contained in the
EPS (standard price list).
Type Z2FRM 6 A… Type Z2FRM 6 B…
TPAB
1
2
TPAB
1
2
Type Z2FRM 6 C… Type Z2FRM 6 T…
TPAB
1
2
TPAB
1
2
AB
27 6
4358
1
1
2
AB
Hydraulics Bosch Rexroth AG
RE 28164/05.11 Z2FRM
3/8
Function, section
The compression spring (7) presses the pressure compen-
sator (5) against the plug screw (8) and keeps the pres-
sure compensator in the open position when there is no flow
through the valve. When fluid flows through the valve, the
pressure acting in channel A②/B② applies a force to the
pressure compensator (5). The pressure compensator moves
into the control position until the forces balance. If the pres-
sure in channel A②/B② rises, the pressure compensator (5)
moves in the closing direction until a balance of forces is once
again attained. Due to this continuous compensation of the
pressure compensator, a constant flow is obtained.
The free flow from channel A①/B① to channel A②/B② is via
the check valve (6).
The valve type Z2FRM is a 2-way flow control valve in sand-
wich plate design. It is used for keeping a flow constant, inde-
pendent of pressure and temperature.
The valve basically comprises of a housing (1) and one or
two flow control cartridges.
The flow from channel A②/B② to channel A①/B① is con-
trolled at the throttling point (3). The throttle cross-section is
set by turning the adjustment type (2) between the throttling
point (3) and the throttling pin (4).
In order to keep the flow in channel A①/B① constant, inde-
pendent of the pressure, a pressure compensator (5) is fitted
downstream of the throttling point (3).
Type Z2FRM 6 C…
① = component side
② = plate side
4/8 Bosch Rexroth AG Hydraulics
Z2FRM RE 28164/05.11
Technical Data (For applications outside these parameters, please consult us!)
general
Weight – Flow control function in channel A, B, T kg 1.3
– Flow control function in channel A, B kg 1.4
Installation position Any
Ambient temperature range °C –20 to +50
hydraulic
Maximum operating pressure bar 315
Minimum pressure differential – with q
V max
bar 18
– with q
V min
bar 7
Pressure stability up to ∆p = 315 bar % ±3 (q
V max
)
Maximum flow – q
V max
l/min 6; 32
– q
V min
cm
3
/min 50; 250
Hydraulic fluid See table below
Hydraulic fluid temperature range °C –20 to +80
Viscosity range mm
2
/s 10 to 800
Maximum permitted degree of contamination of the hydraulic fluid -
cleanliness class according to ISO 4406 (c)
Class 20/18/15
1)
1)
The cleanliness classes specified for the components must
be adhered to in hydraulic systems. Effective filtration pre-
vents faults and at the same time increases the service life
of the components.
For the selection of the filters see
www.boschrexroth.com/filter.
Hydraulic fluid Classification Suitable sealing materials Standards
Mineral oils and related hydrocarbons HL, HLP, HLPD FKM DIN 51524
Environmentally
compatible
– Insoluble in water
HETG FKM
ISO 15380
HEES FKM
– Soluble in water HEPG FKM ISO 15380
Flame-resistant – Water-free HFDU, HFDR FKM ISO 12922
Important information on hydraulic fluids!
– For more information and data on the use of other hydrau-
lic fluids refer to data sheet 90220 or contact us!
– There may be limitations regarding the technical valve
data (temperature, pressure range, service life, mainte-
nance intervals, etc.)!
30
25
20
15
10
5
4
3
2
1
0,5
0,2
0306090 120 150 180 210 240 270 315
6Q
32Q
30
25
20
15
10
5
0
10 20 30 40
Hydraulics Bosch Rexroth AG
RE 28164/05.11 Z2FRM
5/8
Flow q
V
against the input pressure p
E
Flow in l/min →
∆p-q
V
characteristic curves
(via check valve; orifice closed)
Pressure differential in bar →
Flow in l/min → Input pressure in bar →
Characteristic curves (measured with HLP46, ϑ
oil
= 40 ± 5 °C)
0,01/100
Rzmax 4
A
B
T
P
140
40
4 x 5,4
152
4
6
104
3
44
"X"
"X"
7
11,5
8
6,5
1
2
F1
F2
F3
F4
G
6/8 Bosch Rexroth AG Hydraulics
Z2FRM RE 28164/05.11
Unit dimensions: Version "A" and "B" (dimensions in mm)
Required surface quality of
the valve mounting face
①
Component side – porting pattern according to
ISO 4401-03-02-0-05 (with locating hole Ø3 x 5 mm deep)
② Plate side – porting pattern according to
DIN 24340 form A (without locating hole), or
ISO 4401-03-02-0-05 (with locating hole for locating
pin ISO 8752-3x8-St; version "/60")
1 Name plate
2 Flow control cartridge with flow control in channel A,
hexagon SW27, M
A
= 50 Nm
3 Flow control cartridge with flow control in channel B,
hexagon SW27, M
A
= 50 Nm
4 Adjustment type with internal hexagon SW3
5 Identical seal rings for ports A②, B②, P②, T②
6 Valve mounting bores
7 Conversion from discharge into supply control is effect-
ed by rotating the device around the "X"-"X" axis
8 Seal ring plate
Valve mounting screws (separate order)
4 hexagon socket head cap screws ISO 4762 - M5 - 10.9
Note!
Length and tightening torque of the valve mounting screws
must be calculated according to the components mounted un-
der and over the sandwich plate valve.
0,01/100
Rzmax 4
A
B
T
P
170
40
4 x 5,4
152
4
6
104
2
44
"X"
"X"
7
11,5
8
6,5
1
2
F1
F2
F3
F4
G
Hydraulics Bosch Rexroth AG
RE 28164/05.11 Z2FRM
7/8
Unit dimensions: Version "C" (dimensions in mm)
Required surface quality of
the valve mounting face
①
Component side – porting pattern according to
ISO 4401-03-02-0-05 (with locating hole Ø3 x 5 mm deep)
② Plate side – porting pattern according to
DIN 24340 form A (without locating hole), or
ISO 4401-03-02-0-05 (with locating hole for locating
pin ISO 8752-3x8-St; version "/60")
1 Name plate
2 Flow control cartridge, hexagon SW27, M
A
= 50 Nm
4 Adjustment type with internal hexagon SW3
5 Identical seal rings for ports A②, B②, P②, T②
6 Valve mounting bores
7 Conversion from discharge into supply control is effect-
ed by rotating the device around the "X"-"X" axis
8 Seal ring plate
Valve mounting screws (separate order)
4 hexagon socket head cap screws ISO 4762 - M5 - 10.9
Note!
Length and tightening torque of the valve mounting screws
must be calculated according to the components mounted un-
der and over the sandwich plate valve.
0,01/100
Rzmax 4
A
B
T
P
131
40
4 x 5,4
1 54
6
104
2
44
"X"
"X"
7
11
8
6,5
1
2
F1
F2
F3
F4
G
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 state-
ments concerning a certain condition or suitability for a certain applica-
tion 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
Z2FRM RE 28164/05.11
Unit dimensions: Version "T" (dimensions in mm)
Required surface quality of
the valve mounting face
Item explanations and valve mounting screws see page 7.
