Original Proportional Pressure Reducing Valve KDRDE5KR-50/40C30-217, Sany Material Code: 152300000051B001, suitable for multiple Sany machine models.

Sany Original Kawasaki Proportional Pressure Reducing Valve (KDRDE5KR-50/40C30-217 | 152300000051B001)
This is a Sany-exclusive proportional pressure reducing valve for the main pump/pilot system of Sany excavators. It is an original Kawasaki KPM unit with a screw-in cartridge design, used for closed-loop control of main pump flow and pressure, as well as stepless adjustment of pilot pressure.
Core Parameters
- Model: KDRDE5KR-50/40C30-217
- Sany Part Number: 152300000051B001
- Type: Direct-acting spool-type, screw-in cartridge, electromagnetic proportional pressure reducing valve
- Primary Side (Inlet) Maximum Pressure: 8.8MPa (88bar)
- Secondary Side (Outlet) Rated Pressure: 4MPa (40bar)
- Maximum Flow: 10L/min
- Power Supply: DC24V (0–0.7A)
- Control Method: Current proportional (0–700mA) stepless pressure adjustment
- Installation: Screw-in cartridge (standard valve hole)
- Material: High-strength steel, zinc-nickel plating for corrosion resistance
- Original Factory Attribute: Original Kawasaki KPM配套, Sany Heavy Industry original equipment part
Model Breakdown
- KDRDE5KR: Kawasaki proportional pressure reducing valve series (R-type: Power-off A→T open)
- 50: Series specification
- 40: Secondary rated pressure 4MPa
- C30: Coil/plug specification
- 217: Sany custom version number
Applicable Models
- Sany Excavators: SY215/SY235/SY245/SY335/SY365/SY485 (equipped with Kawasaki main pumps)
- Installation Location: Main pump regulator, pilot valve block, hydraulic control unit
- Function: Proportional control of main pump pressure/flow, stepless adjustment of pilot pressure, control of smoothness of operations
Key Features and Replacement
- R-type Power-off Condition: A→T open, P port closed (load relief safety design)
- Non-interchangeable: Flow logic opposite to KDRDE5K (power-off A→T closed)
- Common Faults: Erratic speed, main pump noise, unstable pressure, proportional valve fault reported
- Replacement Requirement: Must be same model KDRDE5KR, 24V, 4MPa, part number 152300000051B001