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SHANTUI SL60W Wheel Loader -Co-axis Amp Orbit-roll Valve
SHANTUI SL60W Wheel Loader -Co-axis Amp Orbit-roll Valve
2025-07-07
SHANTUI SL60W Wheel Loader -Working Hydraulic System (Pilot)
SHANTUI SL60W Wheel Loader -Working Hydraulic System (Pilot)
2025-07-07

SHANTUI SL60W Wheel Loader Priority Valve Assembly

SHANTUI SL60W Wheel Loader -Priority Valve Assembly
SHANTUI SL60W Wheel Loader -Priority Valve Assembly
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What is the SHANTUI Priority Valve Assembly？

  • The Priority Valve Assembly in the SHANTUI SL60W Wheel Loader is a vital hydraulic component engineered to prioritize fluid flow to critical systems—such as steering—ensuring reliable operation even when other hydraulic functions (like lifting) demand high pressure. This compact, robust assembly balances efficiency and safety, integrating precision parts to handle up to 16 MPa of pressure in harsh working environments. Below is a detailed breakdown of its key components:​
  • 1. Structural & Flow Control Core​
  • Valve Body: A high-strength aluminum or cast iron housing with precision-drilled passages, forming the main structure that directs hydraulic fluid. Its durable design resists corrosion and pressure-induced deformation.​
  • Valve Spool: A precision-machined steel spool that slides within the valve body, regulating flow by opening or closing passages. Its smooth, chrome-plated surface ensures low friction and responsive movement.​
  • 2. Priority & Pressure Regulation​
  • Priority Valve: The core mechanism that diverts fluid to critical systems first, ensuring steering or braking functions receive adequate flow before non-essential systems. It adjusts flow dynamically based on pressure demands.​
  • Spring: A high-tensile steel spring that biases the valve spool, maintaining default flow priorities until system pressure overrides it. Its calibrated tension ensures consistent performance across temperature variations.​
  • 3. Safety & Overpressure Protection​
  • Safety Valve Asy: A pressure-relief subsystem that prevents excessive pressure buildup, safeguarding hoses, cylinders, and other components from damage. It triggers at a preset pressure (typically 18–20 MPa).​
  • Safety Valve Seat: A hardened steel seat that forms a tight seal with the safety valve, ensuring precise pressure relief and minimizing leakage during normal operation.​
  • 4. Sealing & Fastening​
  • “O” Ring: Multiple nitrile rubber seals that prevent hydraulic fluid leaks at interfaces between the valve spool, body, and safety valve. Their flexible design accommodates thermal expansion and minor vibrations.​
  • Thread Plug: A threaded steel plug that seals unused ports in the valve body, with an integrated “O” Ring for a leak-proof fit during maintenance or system customization.​
  • Retainer: A metal ring that secures the spring and valve spool in place, preventing dislodgment under high flow or pressure spikes.​
  • System Functionality​
  • The assembly operates by receiving hydraulic fluid from the loader’s pump, with the Valve Spool and Spring directing priority flow to critical systems first. When pressure in non-essential circuits rises, the spool shifts to balance distribution. The Safety Valve Asy acts as a fail-safe, releasing excess pressure to protect the hydraulic network. This design ensures the SHANTUI SL60W maintains operational safety and efficiency, even in demanding conditions like heavy lifting or rough terrain maneuvering.

Product Parameters of SHANTUI Priority Valve Assembly？

NO PART NO. PART NAME Q’TY
0 YXL-F250F-N7 Priority Valve 1
1 YXL-F250L-07 Thread Plug 1
2 GB1235-76，Φ32×3.1 “O” Ring 1
3 YXL-F250L-06 Valve Spool 1
4 YXL-F250L-01 Valve Body 1
5 YXL-F250L-05 Retainer 1
6 YXL-F250L-04 Spring 1
7 GB1235-76，Φ35X3.1 “O” Ring 1
8 YXL-F250L-02 Safety Valve Seat 1
9 GB1235-76，Φ22×4.1 “O” Ring 1
10 YXL-F250L-03 Safety Valve Asy 1

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