Mounting code
No mounting symbol identifies the cartridge type. G identifies sub-plate mounting, while T identifies the threaded type.
Yuken direct operated pressure relief valves
YCB-06 and YCB-10 relief valves
Compare cartridge, sub-plate and threaded relief valves. Choose the flow capacity, pressure setting and adjustment method for your circuit.
NG6 / NG10Two valve sizes
400 Kgf/cm²Maximum operating pressure
50 / 120 L/min.Maximum flow: YCB-06 / YCB-10
3 mountingsCartridge, sub-plate or threaded
Set the circuit’s pressure limit
YCB direct operated pressure relief valves limit excess pressure in hydraulic circuits. The size 06 and size 10 models have different flow capacities, with pressure options selected through the model code.
Choose a cartridge for the specified mounting cavity, a G sub-plate type or a T threaded type. Adjustment is available by screw or hand knob.
This page follows Yuken’s current design 21 catalogue. For an existing design 20 valve, send the complete nameplate code and mounting details so the replacement configuration can be checked.
Compare YCB-06 and YCB-10
| Model | Maximum operating pressure | Maximum flow | Catalogue mass |
|---|---|---|---|
| YCB-06 | 400 Kgf/cm² | 50 L/min. | 1.5 Kg. |
| YCB-10 | 400 Kgf/cm² | 120 L/min. | 3.25 Kg. |
The maximum operating pressure is distinct from the selected adjustment option. Check the minimum adjusting pressure and nominal override curves at the required flow before selection.
Pressure setting options
| Model symbol | Maximum adjustment pressure |
|---|---|
| A0 | 25 Kgf/cm² |
| A | 50 Kgf/cm² |
| B | 100 Kgf/cm² |
| C | 200 Kgf/cm² |
| D | 315 Kgf/cm² |
| E | 400 Kgf/cm² |
These values identify the maximum adjustment pressure for each option. They do not imply adjustment from zero; refer to the catalogue characteristics.
Adjustment code
1 identifies the adjustment screw and 2 identifies the hand knob. The current catalogue uses design number 21.
Connections and sub-plates
| Model | Cartridge thread | Threaded type ports | Sub-plate |
|---|---|---|---|
| YCB-06 | M28 x 1.5 | 1/4 BSP.F | YCBM-06-20 1/4 BSP.F |
| YCB-10 | M35 x 1.5 | 1/2 BSP.F | YCBM-10-20 1/2 BSP.F |
The design 21 catalogue retains these design 20 sub-plate codes. Thread size alone does not establish fit: check the complete mounting cavity, port layout and dimensions in the catalogue.
Selection support
Send the model and mounting details
Include the required pressure and flow so the size, pressure option and adjustment method can be reviewed together.
- Full YCB model code and design number
- Required pressure setting and operating flow
- Cartridge, G sub-plate or T threaded mounting
- Adjustment screw or hand knob
- Cavity or installation drawing and fluid details
- Quantity and sub-plate requirement
YCB design 21 catalogue
Review model codes, pressure characteristics, mounting dimensions and cartridge installation data.
Enquire about YCB-06 or YCB-10
Send your model code and circuit details to Shree Hydraulics in Belagavi for product selection and quotation enquiries across India.