Complete model designation
Confirm size, cover type, high-vent option, coil voltage, electrical connection and manual override. The model designation lists design number 12 and N1 plug-in connection. Code 0 omits the solenoid operated valve.
Yuken Solenoid-controlled pressure relief
LBS Series relief logic valves
Select unloading, two-pressure or three-pressure control arrangements with the appropriate LBS cover and solenoid configuration.
4 sizesCatalogue model range
315 Kgf/cm²Maximum operating pressure
125 to 1200L/min. maximum flow by size
4 - 315Kgf/cm² pressure-adjustment range
Solenoid-controlled pressure relief
LBS combines a relief logic valve with solenoid controlled directional and pilot relief controls. Depending on the cover configuration, the assembly provides unloading or multiple-pressure control.
The catalogue lists LBS-16, LBS-25, LBS-32 and LBS-50. Cover choice determines the pressure-control function, so a valve size alone is not a complete ordering specification.
Confirm the complete cartridge, cover and manifold arrangement against the catalogue installation drawings.
Models and flow limits
| Model | Maximum flow, L/min. | Minimum flow, L/min. |
|---|---|---|
| LBS-16 | 125 | 5 |
| LBS-25 | 250 | 5 |
| LBS-32 | 500 | 8 |
| LBS-50 | 1200 | 10 |
Above 250 Kgf/cm², the catalogue requires flow above 15 L/min. for every model. The listed minimum flows otherwise vary by size.
Maximum operating pressure for the listed models: 315 Kgf/cm².
Cover functions
| Code | Catalogue function |
|---|---|
| 0 | Without solenoid operated valve |
| 1 | Normally closed, for unloading |
| 2 | Normally open, for unloading |
| 3 | Normally closed, with vent restrictor |
| 4 | Normally open, with vent restrictor |
| 5 | Two-pressure control |
| 6 | Three-pressure control |
| 7 | Two-pressure control and unloading |
Cover codes identify different pilot circuits. Review the corresponding hydraulic symbol before confirming a configuration.
Ordering and configuration
Pressure and control requirements
The pressure-adjustment range is 4 - 315 Kgf/cm². The catalogue identifies A, D and R coil types for AC, DC and AC to DC rectified supply respectively; confirm the full voltage designation and the cover's pilot-valve spool type.
Selection support
Confirm the valve and pilot circuit
A full model code, nameplate photograph and circuit drawing help identify the required assembly.
- Valve family, size and complete model code
- Operating pressure and required flow
- Cover type, pilot passages and orifice details
- Pressure settings and unloading requirements
- Coil voltage, electrical connection and manual override
- Hydraulic fluid, seal requirements and quantity
LBS logic valve catalogue
Open the LBS section of the full Yuken logic valve catalogue for specifications, symbols and installation details.
Enquire about LBS logic valves
Send your model code and circuit details to Shree Hydraulics in Belagavi for product selection and quotation enquiries across India.