Yuken Solenoid-operated directional control
Compare LDS valve sizes, normally open or closed covers and electrical options for solenoid-operated pilot control.
LDS combines a logic valve for the main circuit with a solenoid operated directional valve that switches the pilot lines. Select the main valve size and pilot-control arrangement as one assembly.
The current linked catalogue lists LDS-25, LDS-32, LDS-40, LDS-50 and LDS-63. Its cover options include normally closed and normally open arrangements, with additional shuttle-valve circuits.
Confirm the complete cartridge, cover and manifold arrangement against the catalogue installation drawings.
| Model | Rated flow, L/min. |
|---|---|
| LDS-25 | 350 |
| LDS-32 | 500 |
| LDS-40 | 850 |
| LDS-50 | 1400 |
| LDS-63 | 2100 |
Rated flow is specified at a pressure drop of 3 Kgf/cm² with fluid viscosity 35cSt. Confirm the selected cover's circuit symbol rather than relying only on its normally open or closed description.
Maximum operating pressure for the listed models: 315 Kgf/cm².
| Code | Catalogue function |
|---|---|
| 1 | Normally closed |
| 2 | Normally open |
| 3 and 5 | Normally closed with shuttle valve; circuit symbols differ |
| 4 and 6 | Normally open with shuttle valve; circuit symbols differ |
Cover codes identify different pilot circuits. Review the corresponding hydraulic symbol before confirming a configuration.
Confirm the valve size, cracking pressure, poppet cushion, cover circuit, orifice and electrical specification. The O option denotes supply without the solenoid operated valve; it must not be confused with the complete assembly.
The catalogue identifies A for AC, D for DC, R for AC to DC rectified and RQ for rectified quick-return coils. Confirm the complete voltage code, terminal-box or N1 plug-in connection, and manual-override option before quotation.
Selection support
A full model code, nameplate photograph and circuit drawing help identify the required assembly.
Open the LDS section of the full Yuken logic valve catalogue for specifications, symbols and installation details.
Send your model code and circuit details to Shree Hydraulics in Belagavi for product selection and quotation enquiries across India.
