LOGIC CARTRIDGE VALVE LC25DB40E7X/
Manufacturer: Bosch Rexroth
Material #: R900912550
Model : LC25DB40E7X/
***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 LC25DB40E7X/ (R900912550) is a sophisticated industrial hydraulic valve designed for reliable pressure relief operations. This seat valve, which operates without a damping function, ensures precise pressure relief up to the set value. It features a cracking pressure bar and utilizes NBR seals suitable for various hydraulic fluids such as HL, HLP, HLPD, HVLP, HVLPD, and HFC.
The LC25DB40E7X/ valve is pilot-operated and can be manually or electrically proportionally adjusted for pressure. It is constructed as a cartridge valve conforming to DIN ISO standards and can be combined with control covers to execute different pressure functions. With a maximum flow rate specified in liters per minute (l/min) and designed for high-performance applications, it guarantees efficient fluid control within hydraulic systems.
This model's pressure relief function operates by directing effective pressure through the pilot oil supply orifice to the spring side of the element. Upon reaching the set pressure, the spool opens allowing for controlled limitation of the pressure at port A. For pressure reducing functions, this valve can be paired with a control cover that has an integrated pilot control valve.
Moreover, it facilitates pressure sequencing functions enabling connection of secondary systems based on set pressures. The LC25DB40E7X/ also provides circuit examples for various applications such as unloading low-pressure systems or connecting additional systems upon reaching specific pressures.
In summary, this Bosch Rexroth hydraulic valve is versatile in its application with multiple functionalities designed to cater to demanding industrial requirements while ensuring safety through controlled pressure management.
$405.00 USD
More are expected on December 23, 2024
Status: This product is temporarily out of stock.
Qty: Delivered as early as December 23, 2024 when ordered in
This product is eligible for factory repair.
Size 25, A → B, hydraulically actuated
Industrial hydraulic valve in a high performance range. Reliable pressure relief to setting value.
Unpacked Weight: 0.137 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 closed
For the pressure reducing function with opening characteristic, a pressure limitation cartridge valve (type LC..DB40D...) and a control cover with a pressure reducing pilot control valve (type LFA..DR...) are applied. The pilot oil is directed from port A via the supply orifice and the opened pilot control valve to side B.
The main spool is opened and the flow from port A to port B is released.
On reaching the set pressure, the spool is closed and the pressure at port B is reduced according to the pressure-flow characteristics. Potential pressure increases on the secondary side are discharged to the tank via the 3rd way of the pilot control valve. Set-up of a directional valve enables realization of an additional blocking function (type LFA..DRW...).
Pressure sequencing functions
This function enables pressure-dependent connection of a second system.
The required switching pressure is set at the pilot control valve integrated into the control cover.
The pilot oil supply may either be realized externally (pilot oil port X) or internally (from port A via pilot oil ports X or Z2).
The pilot control spring chamber is directed via ports Y or Z1, depressurized to the tank.
Circuit examples
Example 1: (Circuit for pressure-dependent unloading of the low-pressure system)
In the illustrated circuit, the system is supplied via a high-pressure and a low-pressure pump. The system pressure pS acts externally from the high-pressure side via pilot oil port X on the pilot control valve, which sets the low-pressure side to depressurized circulation after the set pressure value is reached. The check valve RV (not included in the scope of delivery) prevents the connection of the high-pressure system with the now depressurized low-pressure system.
On reaching the pressure set at the pilot control spring, the pilot control valve is switched and the spring chamber of the main valve to the tank is unloaded. The main spool is opened and the connection A to B is released.
With the version LFA..DZW..., the required switching position can be selected besides the hydraulic circuit by means of an electrically operated pilot control valve (not included in the scope of delivery of the control cover LFA..DZ...).
Example 2: (Circuit for pressure-dependent connection of a second system)
With this circuit, system 2 is not connected before the pressure in system 1 complies with the specified value. Pilot oil discharge is realized internally from port A of the main valve.
(measured with HLP46, ϑOil = 40 ±5 °C)
The characteristic curves were measured with external, depressurized pilot oil return. Due to the internal pilot oil return, the inlet pressure increases by the output pressure present in port B.
manual pressure adjustment
Type LC 16 DB.E… (with seat piston)
manual pressure adjustment
Type LC 16 DB.E… (with seat piston)
manual pressure adjustment
Type LC 16 DB.D… (seat-spool valve)
manual pressure adjustment
Type LC 16 DB.D… (seat-spool valve)
electrically proportional pressure adjustment
Type LC 16 DB.E… (with seat piston)
electrically proportional pressure adjustment
Type LC 16 DB.E… (with seat piston)
electrically proportional pressure adjustment
Type LC 16 DB.D… (seat-spool valve)
electrically proportional pressure adjustment
Type LC 16 DB.D… (seat-spool valve)
(measured with HLP46, ϑOil = 40 ±5 °C)
The characteristic curves were measured with external, depressurized pilot oil return. Due to the internal pilot oil return, the inlet pressure increases by the output pressure present in port B.
manual pressure adjustment
Type LC 25 DB.E… (with seat piston)
manual pressure adjustment
Type LC 25 DB.E… (with seat piston)
manual pressure adjustment
Type LC 25 DB.D… (with seat-spool piston)
manual pressure adjustment
Type LC 25 DB.D… (with seat-spool piston)
electrically proportional pressure adjustment
Type LC 25 DB.E… (with seat piston)
electrically proportional pressure adjustment
Type LC 25 DB.E… (with seat piston)
electrically proportional pressure adjustment
Type LC 25 DB.D… (with seat-spool piston)
electrically proportional pressure adjustment
Type LC 25 DB.D… (with seat-spool piston)
(measured with HLP46, ϑOil = 40 ±5 °C)
The characteristic curves were measured with external, depressurized pilot oil return. Due to the internal pilot oil return, the inlet pressure increases by the output pressure present in port B.
manual pressure adjustment
Type LC 32 DB.E… (with seat piston)
manual pressure adjustment
Type LC 32 DB.E… (with seat piston)
manual pressure adjustment
Type LC 32 DB.D… (with seat-spool piston)
manual pressure adjustment
Type LC 32 DB.D… (with seat-spool piston)
electrically proportional pressure adjustment
Type LC 32 DB.E… (with seat piston)
electrically proportional pressure adjustment
Type LC 32 DB.E… (with seat piston)
electrically proportional pressure adjustment
Type LC 32 DB.D… (with seat-spool piston)
electrically proportional pressure adjustment
Type LC 32 DB.D… (with seat-spool piston)
(measured with HLP46, ϑOil = 40 ±5 °C)
The characteristic curves were measured with external, depressurized pilot oil return. Due to the internal pilot oil return, the inlet pressure increases by the output pressure present in port B.
manual pressure adjustment
Type LC 40 DB.E… (with seat piston)
manual pressure adjustment
Type LC 40 DB.E… (with seat piston)
manual pressure adjustment
Type LC 40 DB.D… (with seat-spool piston)
manual pressure adjustment
Type LC 40 DB.D… (with seat-spool piston)
electrically proportional pressure adjustment
Type LC 40 DB.E… (with seat piston)
electrically proportional pressure adjustment
Type LC 40 DB.E… (with seat piston)
electrically proportional pressure adjustment
Type LC 40 DB.D… (with seat-spool piston)
electrically proportional pressure adjustment
Type LC 40 DB.D… (with seat-spool piston)
(measured with HLP46, ϑOil = 40 ±5 °C)
The characteristic curves were measured with external, depressurized pilot oil return. Due to the internal pilot oil return, the inlet pressure increases by the output pressure present in port B.
manual pressure adjustment
Type LC 50 DB.E… (with seat piston)
manual pressure adjustment
Type LC 50 DB.D… (with seat-spool piston)
manual pressure adjustment
Type LC 50 DB.E… (with seat piston)
manual pressure adjustment
Type LC 50 DB.D… (with seat-spool piston)
electrically proportional pressure adjustment
Type LC 50 DB.D… (with seat-spool piston)
electrically proportional pressure adjustment
Type LC 50 DB.E… (with seat piston)
electrically proportional pressure adjustment
Type LC 50 DB.E… (with seat piston)
electrically proportional pressure adjustment
Type LC 50 DB.D… (with seat-spool piston)
(measured with HLP46, ϑOil = 40 ±5 °C)
The characteristic curves were measured with external, depressurized pilot oil return. Due to the internal pilot oil return, the inlet pressure increases by the output pressure present in port B.
manual pressure adjustment
Type LC 63 DB.E… (with seat piston)
manual pressure adjustment
Type LC 63 DB.E… (with seat piston)
manual pressure adjustment
Type LC 63 DB.D… (with seat-spool piston)
manual pressure adjustment
Type LC 63 DB.D… (with seat-spool piston)
electrically proportional pressure adjustment
Type LC 63 DB.E… (with seat piston)
electrically proportional pressure adjustment
Type LC 63 DB.E… (with seat piston)
electrically proportional pressure adjustment
Type LC 63 DB.D… (with seat-spool piston)
electrically proportional pressure adjustment
Type LC 63 DB.D… (with seat-spool piston)
|
Version "E" |
Version “D” |
||
|
Area ratio |
Area ratio |
Area ratio |
Area ratio |
Installation bore and connection dimensions according to ISO 7368
Dimensions in mm
|
1 |
Depth of fit |
|
2 |
Control dimension |
|
3 |
If a different diameter is used for port B than ØD3 or (ØD3*), the distance from the cover support surface to the bore center must be calculated. |
|
4 |
Port B may be positioned around the central axis of port A. However, it must be observed that the mounting bores and the control bores are not damaged. |
|
7 |
At Ø ≤45 mm → Fitting H8 admissible |
|
NG |
ØD1 |
ØD2 |
ØD3/(ØD3*) |
ØD4 |
ØD5 |
ØD6 1) |
ØD7 |
H1/(H1*) |
H2 |
H3 |
H4 |
H5 |
H6 |
H7 |
H8 |
H9 |
L1 |
ØL1 |
L2 |
ØL2 |
L3 |
L4 |
L5 |
W |
||||
|
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
|||||
| 16 | 32 |
H7 - |
16 |
16 25 |
25 |
H7 - |
M8 | 4 | 4 |
H13 - |
34 29.5 |
56 | 43 | - | 20 | 11 | 2 | 20 | 2 | 0.5 |
65 80 |
- | 46 | - | 23 | 25 | 10.5 | 0.05 |
| 25 | 45 |
H7 - |
25 |
25 32 |
34 |
H7 - |
M12 | 6 | 6 |
H13 - |
44 40.5 |
72 | 58 | - | 25 | 12 | 2.5 | 30 | 2.5 | 1 |
85 - |
- | 58 | - | 29 | 33 | 16 | 0.05 |
| 32 | 60 |
H7 - |
32 |
32 40 |
45 |
H7 - |
M16 | 8 | 6 |
H13 - |
52 48 |
85 | 70 | - | 35 | 13 | 2.5 | 30 | 2.5 | 1.5 |
102 - |
- | 70 | - | 35 | 41 | 17 | 0.1 |
| 40 | 75 |
H7 - |
40 |
40 50 |
55 |
H7 - |
M20 | 10 | 6 |
H13 - |
64 59 |
105 | 87 | - | 45 | 15 | 3 | 30 | 3 | 2.5 |
125 - |
- | 85 | - | 42.5 | 50 | 23 | 0.1 |
| 50 | 90 |
H7 - |
50 |
50 63 |
68 |
H7 - |
M20 | 10 | 8 |
H13 - |
72 65.5 |
122 | 100 | - | 45 | 17 | 3 | 35 | 4 | 2.5 |
140 - |
- | 100 | - | 50 | 58 | 30 | 0.1 |
| 63 | 120 |
H7 - |
63 |
63 80 |
90 |
H7 - |
M30 | 12 | 8 |
H13 - |
95 86.5 |
155 | 130 | - | 65 | 20 | 4 | 40 | 4 | 3 |
180 - |
- | 125 | - | 62.5 | 75 | 38 | 0.2 |
| 80 | 145 |
H7 - |
80 |
80 100 |
110 |
H7 - |
M24 | 16 | 10 |
H13 - |
130 120 |
205 | 175 | ± 0.2 | 50 | 25 | 5 | 40 | 5 | 4.5 |
- - |
250 | - | 200 | - | - | - | 0.2 |
| 100 | 180 |
H7 - |
100 |
100 125 |
135 |
H7 - |
M30 | 20 | 10 |
H13 - |
155 142 |
245 | 210 | ± 0.2 | 63 | 29 | 5 | 50 | 5 | 4.5 |
- - |
300 | - | 245 | - | - | - | 0.2 |
| 1) | Maximum dimension |
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