LFA25H4-7X/FX10
Manufacturer: Bosch Rexroth
Material #: R900912699
Model : LFA25H4-7X/FX10
***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth LFA25H4-7X/FX10 (R900912699) is a high-performance 4-way cartridge valve designed for seamless integration into compact block systems. This valve accommodates standardized receiving holes according to ISO specifications, ensuring compatibility and ease of installation within control blocks. The power section of the valve, featuring connections A and B, can be easily fitted and secured with a cover that also serves as a conduit for pilot control valves.
This model boasts versatile functionality, capable of being utilized for pressure, directional, and throttle applications or a combination thereof. Its adaptability is further enhanced by the ability to adjust sizes to match varying flow rates required by different actuator pathways. The LFA25H4-7X/FX10 promotes cost-efficiency by allowing a single power section to manage multiple functions.
The construction of this 4-way cartridge valve includes a control cover that houses control bores and may include additional features such as stroke limitation, hydraulically controlled directional seat valves, or shuttle valves depending on the overall function needed. Electrical operation is also an option with the potential inclusion of directional spool or seat valves on the control cover. The installation kit comes complete with essential components like bushing, ring (up to NG), valve poppet (with or without damping nose), and closing spring.
The operation of this valve is pressure-dependent, creating three distinct pressurized areas for functionality: A1, A2, and A3. These areas work in tandem with the spring mechanism to determine spool position through the balance of opening and closing forces. The LFA25H4-7X/FX10 allows fluid flow from A to B or vice versa while ensuring channel A remains leak-free when blocked.
Equipped with remote control port options and stroke limitation features, this standard series size component can withstand maximum operating pressures up to X bar and facilitates maximum flows up to X l/min. Bosch Rexroth's commitment to quality engineering is evident in this robustly designed LFA25H4-7X/FX10 4-way cartridge valve (R900912699), which promises reliable performance in various hydraulic applications.
757.00
More are expected on July 14, 2025
Status: This product is temporarily out of stock.
Qty: Delivered as early as July 14, 2025 when ordered in
This product is eligible for factory repair.
2-way cartridge valves are elements that have been designed for a compact block design. The power section with connections A and B is installed into the control block in a receiving hole standardized according to ISO 7368 and closed with a cover. In most cases, the cover is also the connection from the control side of the power section to the pilot control valves.
By control with respective pilot control valves, the power section can be applied for pressure, directional and throttle functions or a combination of these functions. Particularly efficient solutions are realized by adjustment of the size to various flows of the individual ways of an actuator. The application of power sections of elements for multiple functions is very cost-effective.
2-way cartridge valves generally consist of control cover (1) and installation kit (2). The control cover contains the control bores and optionally a stroke limitation function, a hydraulically controlled directional seat valve or a shuttle valve according to the required overall function. Additionally, electrically operated directional spool or seat valves can be installed at a control cover. The installation kit consists of a bushing (3), ring (4) (only up to NG32), valve poppet (5), optionally with damping nose (6) or without damping nose (7) as well as closing spring (8).
The function of 2-way cartridge valves is pressure-dependent. This way, three crucial pressurized areas are realized for the function. A1, A2, A3. The area at valve seat A1 is observed as 100 %. Depending on the version, the annulus area A2 realized by grading is 7 % or 50 % of area A1. The area ratio A1 : A2 is respectively either 14.3 : 1 or 2 : 1. The area A3 is identical to the sum of areas A1 + A2. Due to the different area ratios A1 : A2 and the resulting different annulus areas (A2), the area A3 is one time 107 % and another time 150 % of the area A1 at the seat, which is observed as 100 %.
In general, the following applies:
The areas A1 and A2 are effective in opening direction. The area A3 and the spring are effective in closing direction. The direction of action of the resulting force from the opening and closing forces determines the spool position of the 2-way cartridge valve.
The 2-way cartridge valves can be passed from A to B or from B to A. Pressurization of area A3 by pilot oil discharge from channel B or external pilot oil supply, channel A is blocked without leakage.
Type LFA . H…/F
Type LFA . H…/FX**
Size 16 … 40
Dimensions in mm
|
1 |
Name plate at NG16, 25, 32 |
|
2 |
Name plate at NG40 |
|
3 |
Port X optionally as threaded port |
|
NG |
D1 |
D2 |
H1 |
H2 |
H3 |
H8 max |
▢ L1 |
L2 |
L3 |
T1 |
|
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
|||
| 16 | G 1/8 | M6 | 35 | 12 | 15 | 130 | 65 | 32.5 | 4 | 8 |
| 25 | G1/4 | M6 | 40 | 16 | 24 | 135 | 85 | 42.5 | 5 | 12 |
| 32 | G1/4 | M6 | 60 | 16 | 28 | 155 | 100 | 50 | 5 | 12 |
| 40 | G1/2 | M8 x 1 | 100 | 30 | 32 | 209 | 125 | 72 | 5 | 14 |
Size 50 … 63
Dimensions in mm
|
1 |
Name plate |
|
2 |
Port X optionally as threaded port |
|
3 |
Scale |
|
4 |
countered |
|
NG |
D1 |
D2 |
H1 |
H2 |
H3 |
H5 max |
▢ L1 |
L2 |
L3 |
T1 |
SW3 1) |
SW4 |
|
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
|||
| 50 | G1/2 | M8 x 1 | 110 | 32 | 34 | 200 | 140 | 80 | 5 | 14 | 19 | 5 |
| 63 | G3/4 | G3/8 | 125 | 40 | 50 | 220 | 180 | 90 | 5 | 16 | 19 | 5 |
| 1) | Internal hexagon |
Size 80 ... 100
Dimensions in mm
|
1 |
Name plate |
|
2 |
Port X optionally as threaded port |
|
4 |
countered |
|
NG |
D1 |
D2 |
D3 1) |
H1 |
H2 |
H3 |
H6 |
H7 |
L3 |
T1 |
SW5 2) |
SW6 2) |
|
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
|||
| 80 | 250 | G3/8 | G3/4 | 114 | 24 | 45 | 229 | 30 | 3 | 16 | 5 | 14 |
| 100 | 300 | G1/2 | G1 | 132 | 35 | 52.5 | 247 | 38 | 3 | 18 | 5 | 14 |
| 1) | For ordering code of orifices, see "Accessories" |
| 2) | Internal hexagon |
Mounting screws (included in scope of delivery)
|
Hexagon socket head cap screws ISO 4762 - 10.9-flZn/nc/480h/C 1) |
||
|
Size |
Quantity |
Tightening torque MA in Nm ±10 % |
|
16 |
4 |
30 |
|
25 |
4 |
100 |
|
32 |
4 |
240 |
|
40 |
4 |
480 |
|
50 |
4 |
480 |
|
63 |
4 |
1600 |
|
80 |
8 |
800 |
|
100 |
8 |
1600 |
|
125 |
8 |
3100 |
|
160 |
12 |
5000 |
| 1) | Hexagon socket head cap screws UNC, see data sheet 08936 |
Notices:
The specified tightening torques stated are guidelines when using screws with the specified friction coefficients and when using a manual torque wrench (tolerance ± 10%). The specified tightening torques were calculated with total friction coefficient μtotal = 0.09 ... 0.14; adjust in case of modified surfaces. Supplied mounting screws are only suitable for direct assembly on a block. If an intermediate cover is used, mounting screws have to be designed accordingly longer.Connection dimensions according to ISO 7368
Size 16 ... 63
Dimensions in mm
Size 80 ... 100
Dimensions in mm
|
NG |
16 | 25 | 32 | 40 | 50 | 63 | 80 | 100 | |
|
ØD5 1) |
M8 | M12 | M16 | M20 | M20 | M30 | M24 | M30 | |
|
ØD6 |
mm |
4 | 6 | 8 | 10 | 10 | 12 | 16 | 20 |
|
ØD7H13 |
mm |
4 | 6 | 6 | 6 | 8 | 8 | 10 | 10 |
|
H4 |
mm |
20 | 25 | 35 | 45 | 45 | 65 | 50 | 63 |
|
L1 |
mm |
65 80 |
85 - |
102 - |
125 - |
140 - |
180 - |
250 - |
300 - |
|
L2 |
mm |
46 - |
58 - |
70 - |
85 - |
100 - |
125 - |
200 - |
245 - |
|
L3 |
mm |
23 | 29 | 35 | 42.5 | 50 | 62.5 | - | - |
|
L4 |
mm |
25 | 33 | 41 | 50 | 58 | 75 | - | - |
|
L5 |
mm |
10.5 | 16 | 17 | 23 | 30 | 38 | - | - |
| 1) | Mounting thread for version "/12" see data sheet 08936 |
|
1 |
Bore for locating pin |
|
2 |
80 mm only at control cover for directional valve set-up NG16 (axis X–Y bore) |
Notice:
The dimensions are nominal dimensions which are subject to tolerances.
Orifice symbol
|
Orifice symbol |
Ordering code |
|||
|
A** |
|
A** |
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. |
|
|
Ø1,2 |
|
This orifice is designed as bore. No specifications are made in the type designation. (Orifice Ø in mm) |
||
|
Z12 |
|
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) |
||
Additional functions with special numbers (upon request)
|
Symbol |
Type |
Size |
Description / special characteristic |
|
LFA…H…/FDR… |
40 … 80 |
Stroke limitation cover for pressure logics |
Orifice selection
Orifice selection
Orifices
|
Orifice Ø in mm |
Order numbers |
Material numbers |
||||||
|
M6 conical |
M8 x 1 conical |
G 1/8 conical |
G 1/4 conical |
G 3/8 conical |
G 1/2 conical |
G 1 conical |
||
|
– |
00 |
– |
– |
– |
– |
– |
– |
– |
|
0,5 |
05 |
R913040356 |
R913017600 |
R913030187 |
R913040456 |
– |
– |
– |
|
0,6 |
06 |
R913040358 |
R913017605 |
R913017606 |
R913020197 |
– |
– |
– |
|
0,7 |
07 |
R913040360 |
R913017609 |
R913046092 |
– |
– |
– |
– |
|
0,8 |
08 |
R913029447 |
R913017614 |
R913017616 |
R913017615 |
R913040481 |
R913040499 |
– |
|
1,0 |
10 |
R913019186 |
R913017621 |
R913024679 |
R913017622 |
R913040484 |
R913040500 |
– |
|
1,2 |
12 |
R913040362 |
R913017627 |
R913017629 |
R913017628 |
R913040486 |
R913040501 |
– |
|
1,5 |
15 |
R913028337 |
R913017637 |
R913017639 |
R913017638 |
R913040488 |
R913028317 |
– |
|
1,8 |
18 |
R913030186 |
R913017644 |
R913017646 |
R913017645 |
R913040489 |
R913045913 |
– |
|
2,0 |
20 |
R913029870 |
R913017651 |
R913040450 |
R913017652 |
R913028417 |
R913028336 |
– |
|
2,5 |
25 |
R913032543 |
R913035796 |
R913017656 |
R913019582 |
R913040493 |
R913040502 |
– |
|
3,0 |
30 |
R913040368 |
R913017661 |
R913017663 |
R913017662 |
R913018266 |
R913040503 |
R913040467 |
|
3,5 |
35 |
– |
R913017667 |
R913040452 |
R913040463 |
R913028318 |
R913019856 |
R913040469 |
|
4,0 |
40 |
– |
R913017670 |
R913027078 |
R913040464 |
R913018265 |
R913029168 |
R913040470 |
|
4,5 |
45 |
– |
R913046571 |
R913017671 |
R913040465 |
– |
R913040506 |
– |
|
5,0 |
50 |
– |
– |
R913017673 |
R913040468 |
R913023871 |
R913019857 |
R913040471 |
|
5,5 |
55 |
– |
– |
R913027077 |
– |
R913040495 |
R913053659 |
– |
|
6,0 |
60 |
– |
– |
– |
– |
R913023870 |
R913028418 |
R913020247 |
|
7,0 |
70 |
– |
– |
– |
R913040461 |
R913017675 |
R913040509 |
– |
|
7,5 |
75 |
– |
– |
– |
– |
R913023430 |
– |
R913018328 |
|
8,0 |
80 |
– |
– |
– |
– |
R913046570 |
R913040510 |
R913020246 |
|
closed |
99 |
R913019128 |
R913019129 |
R913019137 |
R913019136 |
R913019138 |
– |
R913019140 |
Plug screws
|
Thread |
Tightening torque MA in Nm ±10 % |
|
G 1/8 |
12 |
|
G 1/4 |
30 |
|
G 3/8 |
55 |
|
G 1/2 |
80 |
|
G 3/4 |
135 |
|
G 1 |
225 |
|
G 1 1/4 |
360 |
