BOSCH REXROTH
R900925874
$1,243.87 USD
- BOSCH REXROTH
- Material:R900925874
- Model:LFA32DBEM-7X/420
Quantity in stock: 0
The Bosch Rexroth LFA32DBEM-7X/420 (R900925874) is a state-of-the-art hydraulic control valve designed for subplate mounting with a hexagon pressure rating of 420 bars. This model features manual maximum pressure adjustment alongside electrically proportional pressure adjustment capabilities, providing versatile control for various hydraulic applications. The valve utilizes an ISO control cover for way cartridge valves to ensure reliable pressure limiting in conjunction with a way cartridge valve according to the specified hydraulic symbol. Incorporating NBR seals, the LFA32DBEM-7X/420 is compatible with multiple hydraulic fluids including HL, HLP, HLPD, HVLP, HVLPD, and HFC. This ensures broad application suitability across different system requirements. The valve's size and weight are optimized for its function, offering a compact solution without compromising on performance. The LFA32DBEM-7X/420 operates as a pilot-operated valve in seat or spool design and can be used to realize different pressure functions by combining it with appropriate control covers. For the pressure relief function, this model is designed as a seat valve that maintains closure through spring force until the set pressure is reached, subsequently opening the spool to limit the pressure according to its characteristics. In contrast, for the pressure reducing function, it operates as a spool valve that remains open under set pressures until it reaches the performance limit where it closes to reduce the port A pressure. This model is part of component series X and X and can handle maximum operating pressures of up to 420 bars. Its advanced features such as proportional valves (DBETX...) with maximum pressure limitation further enhance its functionality within hydraulic systems requiring precise and reliable pressure control.
Size 32, manual maximum pressure adjustment with electrically proportional pressure adjustment, with mounting surface ISO4401
Control cover for 2-way cartridge valves, reliable limiting of the pressure in connection with a 2-way cartridge valve according to the hydraulic symbol.
Unpacked Weight: 3.620 kg
General
2-way cartridge valves for pressure functions are pilot-operated valves in seat or spool design. The power section designed as cartridge valve (1) is installed into a receiving hole standardized according to DIN ISO 7368 and closed with a control cover (2).
The pilot control valve (4) for manual or electrically proportional pressure adjustment is integrated into the control cover (2) or is installed on the control cover (2) as pilot valve with mounting dimensions according to DIN 24 340.
By combination of cartridge valves with the control covers, different pressure functions can be realized. .
Pressure relief function
The cartridge valve (1) for the pressure relief function (type LC . DB...) is designed as seat valve without area difference (no effective area at port B). The effective pressure at port A is directed via the pilot oil supply orifice (5) to the spring side (6) of the element. Under the pressure set at the pilot control valve (4), the spool (3) is pressure-compensated and closed by the spring force.
On reaching the set pressure, the spool (3) is opened and the pressure at port A is limited according to the pressure-flow characteristics.
Pressure reducing function
Rest position open
The cartridge valve for the pressure reducing function is designed as spool valve without area difference (no effective areas at port B).
As pilot control valve, identical cover types as for the pressure relief function are applied (type LFA..DB...).
The effective pressure at port A is directed via the pilot oil supply orifice to the spring side of the spool. Under the performance limit and the pressure set at the pilot control valve, the spool is pressure-compensated and retained in open position by the spring force to enable free flow from port B to port A.
On reaching the set pressure, the spool is closed and the pressure at port A is reduced according to the pressure-flow characteristics.
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Size |
Pilot control valve |
Proportional pressure adjustment version |
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16 to 32 |
40 to 63 |
80 and 100 |
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• |
• |
• |
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• = available |
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Proportional valves |
• |
• |
DBET-5X/... |
with maximum pressure limitation |
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| Data Sheet | Download Data Sheet |
| Manual | Download Manual |
| Manual | Download Manual |
| Manual | Download Manual |
| Manual | Download Manual |
| Manual | Download Manual |
| Spool symbol | Symbol DBEM |
| Max. pressure | 420 |
| Productgroup ID | 9,10,11,12,13,14 |
| Type of actuation | manual pressure adjustment |
| Size | 32 |
| Type of connection | Subplate mounting |
| Connection diagram | ISO 7368-09-5-1-16 |
| Weight | 3.620 |
| Seals | NBR |
| Hydraulic fluid | HL,HLP,HLPD,HVLP,HVLPD,HFC |
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01 |
02 |
03 |
04 |
05 |
06 |
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LFA |
DBEM |
‒ |
7X |
/ |
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Type |
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01 |
Control cover LFA |
LFA |
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Size |
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02 |
NG 16 |
16 |
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NG 25 |
25 |
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NG 32 |
63 |
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NG 40 |
40 |
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NG 50 |
50 |
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NG 63 |
63 |
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NG 80 |
80 |
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NG 100 |
100 |
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Version |
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03 |
With electrical proportional pressure adjustment, with maximum pressure limitation without electrical feedback and with maximum pressure limitation |
DBEM 1) |
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Component series |
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04 |
Component series 70 ... 79 (70 ... 79: unchanged installation and connection dimensions) 2) |
7X |
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Component series 60 … 69 (60 … 69: unchanged installation and connection dimensions) 3) |
6X |
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Pressure rating DBmax. (observe admissible pressure of the pilot control valve) |
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05 |
Set pressure up to 25 bar |
025 |
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Set pressure up to 50 bar |
050 |
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Set pressure up to 100 bar |
100 |
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Set pressure up to 200 bar |
200 |
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Set pressure up to 315 bar |
315 |
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Set pressure up to 400 bar |
400 |
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Set pressure up to 420 bar 4) |
420 |
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Seal material |
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08 |
NBR seals |
no code |
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FKM seals |
V |
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| 1) For set-up of a proportional pressure relief valve without electrical feedback and with maximum pressure limitation | |
| 2) Component series 7X for sizes 16…63. | |
| 3) Component series 6X for sizes 80 and 100. | |
| 4) NG 16 ... 32 only |
General information on the ordering codes for control covers: Pilot control valves (maximum operating pressure)
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Pilot control valve |
Control cover |
Maximum operating pressure in bar Y, T |
included in type |
separate order |
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Type |
Catalog sheet no. |
NG |
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X |
at pressure control |
static |
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DBD. 2 K2X/… 1) |
upon request |
16 to 32 |
420 |
depressurized (up to ≈ 2 bar) |
315 |
● |
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DBD. 6 K1X/… 2) |
25 402 |
40 to 63 |
400 |
315 |
● |
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DBD. 10 K1X/… 2) |
25 402 |
80, 100 |
400 |
315 |
● |
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DBET-5X/.G24-1 3) |
29 165 |
16 to 32 |
350 |
100 |
● |
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DBET-5X/.G24… |
29 165 |
40 |
350 |
100 |
● |
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DBET-5X/.YG24-1 3) |
upon request |
50 to 100 |
350 |
100 |
● |
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| 1) Possible pressure ratings: 25, 50, 100, 200, 315, 420 | |
| 2) Possible pressure ratings: 25, 50, 100, 200, 315, 400 | |
| 3) Possible pressure ratings: 50, 100, 200, 315, 350 1 = G 1/4 threaded port T; special cone |
Notice:
By combination of a 2-way cartridge valve with a pilot control valve, various valve functions can be realized.
In particular, the following devices come into question in porting pattern form A6 (up to NG 63) and form A10 (NG 80 to 100) DIN 24 340.
Valve mounting screws are included in the scope of delivery of the control cover.
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Orifice symbol |
Symbol in ordering code |
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A** |
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A** |
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This orifice is designed as screw-type orifice. If an orifice is to be installed, the respective code letter with the orifice Ø in 1/10 mm has to be entered in the type designation. Example: A12 = Orifice with Ø1.2 mm in channel A. |
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Ø1,2 |
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This orifice is designed as bore. No specifications are made in the type designation. (Orifice Ø in mm) |
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Z12 |
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This orifice is designed as screw-type orifice. This is a standard orifice. No specifications are made in the type designation. (Orifice Ø in 1/10 mm) |
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Additional preferred types and standard units are specified in the EPS (standard price list).
general
|
Size |
16 | 25 | 32 | 40 | 50 | 63 | 80 | 100 |
hydraulic
|
Size |
16 | 25 | 32 | 40 | 50 | 63 | 80 | 100 | ||
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Maximum operating pressure 1) |
bar |
420 | ||||||||
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Hydraulic fluid |
see table | |||||||||
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Hydraulic fluid temperature range |
NBR seals |
°C |
-30 … +80 | |||||||
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FKM seals |
°C |
-20 … +80 | ||||||||
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Viscosity range |
mm²/s |
2.8 … 380 | ||||||||
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Maximum admissible degree of contamination of the hydraulic fluid 2) |
Class 20/18/15 according to ISO 4406 (c) | |||||||||
| 1) | Attention: Observe pmax of the pilot control valves! |
| 2) | The cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and simultaneously increases the life cycle of the components. For the selection of the filters, see www.boschrexroth.com/filter. |
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Hydraulic fluid |
Classification |
Suitable sealing materials |
Standards |
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Mineral oil |
HL, HLP |
FKM, NBR |
DIN 51524 |
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Bio-degradable |
Insoluble in water |
HEES (synthetic esters) |
FKM |
VDMA 24568 |
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HETG (rape seed oil) |
FKM, NBR |
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Soluble in water |
HEPG (polyglycols) |
FKM |
VDMA 24568 |
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Other hydraulic fluids on request |
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For applications outside these parameters, please consult us!
The control covers are equipped with standard orifice fitting – optimized in our test area. Orifice specification in the type key is not necessary. Deviating operating conditions may require respective adjustment of the orifice size. The orifices are designed as screw-type orifices.
Orifice representation in symbol
LFA..DBEM-7X/...NG 16, 25, 32
LFA..DBEM-7X/...NG 40
LFA..DBEM-7X/...NG 50, 63
LFA..DBEM-6X/...NG 80, 100
Installation bore and connection dimensions according to ISO 7368
NG16 ... 63
Dimensions in mm
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5 |
Bore for locating pin (cover pin assembled according to DIN 24 342) |
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6 |
Information on porting pattern NG 16: Length L1 (axis x–y bores) is 80 mm |
|
8 |
Bore for locating pin at function as main pressure relief valve (reposition cover pin for assembly accordingly) |
NG 80, 100
Dimensions in mm
|
5 |
Bore for locating pin (cover pin assembled according to DIN 24 342) |
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Mounting screws: Hexagon socket head cap screw according to DIN 912-10.9 |
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Pilot control valve Type |
Dimensions |
Tightening torque in Nm |
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DBET … |
M5 x 30 |
8,9 |
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Mounting screws (included in scope of delivery) |
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Hexagon socket head cap screw according to DIN 912-10.9 |
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NG |
Quantity |
Dimensions |
Tightening torque in Nm |
|
16 |
4 |
M 8 x 45 |
32 |
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25 |
4 |
M 12 x 50 |
110 |
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32 |
4 |
M 16 x 60 |
270 |
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40 |
4 |
M 20 x 70 |
520 |
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50 |
4 |
M 20 x 80 |
520 |
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63 |
4 |
M 30 x 100 |
1800 |
|
80 |
8 |
M 24 x 120 |
900 |
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100 |
8 |
M 30 x 120 |
1800 |
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Thread dimensions of orifice |
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D orifices at type ..DBE.. NG 25 to 63 |
M8 x 1 conical |
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Orifices for NG 80, 100 |
M8 x 1 conical (A**, B**, P**, D**) or G 1/4 (X**, F**) |
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other installed orifices |
M6 conical |
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NG 16, 25, 32
Dimensions in mm
|
1 |
Port X optionally as threaded port |
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2 |
Port Y optionally as threaded port |
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3 |
Locating pin |
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4 |
Adjustment type "2" |
|
9 |
Name plate |
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10 |
Lock nut |
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11 |
Valve mounting screws are included in the scope of delivery of the control cover |
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14 |
Proportional pressure relief valve type DBET-5X/…G24 (NG 40) type DBET-5X/…Y G24-1 (NG 50) 1) |
|
15 |
Pressure relief valve NG 6 (included in scope of delivery) |
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1 |
Port X optionally as threaded port |
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2 |
Port Y optionally as threaded port |
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3 |
Locating pin |
|
4 |
Adjustment type "2" |
|
9 |
Name plate |
|
10 |
Lock nut |
|
11 |
Valve mounting screws are included in the scope of delivery of the control cover |
|
14 |
Proportional pressure relief valve type DBET-5X/…–1 1) |
| 1) 1 = G 1/4 threaded port T; special cone | |
| 1) 1 = G 1/4 threaded port T; special cone |
Dimensions in mm
|
1 |
Port X optionally as threaded port |
|
2 |
Port Y optionally as threaded port |
|
3 |
Locating pin |
|
4 |
Adjustment type "2" |
|
9 |
Name plate |
|
10 |
Lock nut |
|
11 |
Valve mounting screws are included in the scope of delivery of the control cover |
|
14 |
Proportional pressure relief valve type DBET-5X/…G24 (NG 40) type DBET-5X/…Y G24-1 (NG 50) 1) |
|
15 |
Pressure relief valve NG 6 (included in scope of delivery) |
|
1 |
Port X optionally as threaded port |
|
2 |
Port Y optionally as threaded port |
|
3 |
Locating pin |
|
4 |
Adjustment type "2" |
|
9 |
Name plate |
|
10 |
Lock nut |
|
11 |
Valve mounting screws are included in the scope of delivery of the control cover |
|
14 |
Proportional pressure relief valve type DBET-5X/…–1 1) |
| 1) 1 = G 1/4 threaded port T; special cone |
NG63
Dimensions in mm
|
1 |
Port X optionally as threaded port |
|
2 |
Port Y optionally as threaded port |
|
3 |
Locating pin |
|
4 |
Adjustment type "2" |
|
9 |
Name plate |
|
10 |
Lock nut |
|
11 |
Valve mounting screws are included in the scope of delivery of the control cover |
|
14 |
Proportional pressure relief valve type DBET-5X/…Y G24 1) |
|
15 |
Pressure relief valve NG 6 (included in scope of delivery) |
| 1) 1 = G 1/4 threaded port T; special cone |
NG 80, 100
Dimensions in mm
|
1 |
Port X optionally as threaded port |
|
2 |
Port Y optionally as threaded port |
|
3 |
Locating pin |
|
4 |
Adjustment type "2" |
|
9 |
Name plate |
|
14 |
Proportional pressure relief valve type DBET-5X/…Y G24 1) |
|
15 |
Pressure relief valve NG 6 (included in scope of delivery) |
| 1) 1 = G 1/4 threaded port T; special cone |
Notice:
The dimensions are nominal dimensions which are subject to tolerances.
|
NG |
Ø Orifice P** 1) |
Ø Orifice X** 1) |
Ø Orifice F** 1) |
Ø Orifice D** 1) |
H1 |
H2 |
H3 |
H4 |
H5 |
L1 |
L2 |
L3 |
L4 |
L5 |
L7 |
|
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
|
| 16 | 1 | 0.8 | 1 | 0.8 | 40 | 17 | 15 | 19 | 28 | 65 | 80 | 36.5 | 32.5 | 7 | 35 |
| 25 | 1 | 0.8 | 1 | 0.8 | 40 | 19 | 24 | 19 | 28 | 85 | 85 | 49 | 45.5 | 8 | 36 |
| 32 | 1 | 1 | 1.2 | 1 | 50 | 26 | 28 | 26 | 37 | 100 | 100 | 56.5 | 53 | 31 | 57 |
| 1) | Orifice Ø, orifice M6 conical |
|
NG |
Ø Orifice B** |
Ø Orifice P** 1) |
Ø Orifice F** 1) |
Ø Orifice D** 1) |
H1 |
H2 |
H3 |
H4 |
H5 |
▢ L1 |
L3 |
L4 |
L5 |
L7 |
|
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
|
| 40 | - | 1.5 | 1.2 | 1 | 60 | 20 | 32 | 27 | 40 | 125 | 69 | 76 | 43.5 | 68 |
| 50 | 0.8 1) | - | 1.5 | 2 | 68 | 19.5 | 34 | 35 | 50 | 140 | 80 | 84 | 51 | 74.5 |
| 1) | Orifice Ø, orifice M6 conical |
|
NG |
Ø Orifice B** |
Ø Orifice P** |
Ø Orifice X** |
Ø Orifice F** |
Ø Orifice D** 1) |
D2 |
H1 |
H2 |
H3 |
H4 |
▢ L1 |
L8 |
|
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
|
| 63 | 0.8 1) | - | - | 2 1) | 2.5 | - | 82 | 55 | 50 | 45 | 180 | - |
| 80 | 0.8 2) | 1 2) | 3 3) | 2.5 3) | - | 250 | 100 | 30 | 45 | 52 | - | 75 |
| 100 | 0.8 2) | 1 2) | 3.5 3) | 3 3) | - | 300 | 100 | 30 | 51 | 52 | - | 85 |
| 1) | Orifice Ø, orifice M6 conical |
| 2) | Orifice Ø, orifice M8 x 1 conical |
| 3) | Orifice Ø, orifice G 1/4 conical |