Oil rotary union LHS225-4Y

4-passagefor heavy-duty applicationshydraulic

Product Overview
Designed for 50‑ton class excavator oil-to-electric retrofit projects, the LHS225-4Y hydraulic rotary union transfers high-pressure hydraulic oil between stationary and rotating assemblies, enabling continuous 360° rotation without hose twisting. It provides stable, leak-tested hydraulic transfer for heavy-duty slew systems and electrification applications.

Core Configuration

• Medium: Hydraulic oil
• Design pressure (main circuits A & B): 40 MPa (6000 PSI)
• Rotor interface (main A/B): SAE 1-1/2" 6000 PSI
• Stator interface (main A/B): 2 × SAE 1" 6000 PSI
• Flow orifice (main A/B): Ø40 (high-flow orifice)

BR Control / Return Circuits

• 2 independent passages
• Design pressure: 15 bar
• Interface: G1/2"
• Flow orifice (BR): Ø15

Key Features

• Prevents hose twisting and bursting: continuous 360° rotation with no dead point
• Pressure separation: main A/B circuits at 40 MPa, BR control circuits at 15 bar operate independently
• High hydraulic throughput: Ø40 high-flow orifice for main circuits to handle large volume flows
• Slow-speed, high-torque optimized: continuous rotation at <=5 RPM, bidirectional
• Jobsite durability: operating temperature -20°C to +80°C; resistant to dust and thermal shock
• Electrification-ready: core component for diesel-to-electric or hybrid excavator conversions

Technical Specifications (table)

• Br: Rotor interface: 2‑G1/2"; Stator interface: 2‑G1/2"; Flow orifice: 2× Ø15; Medium: Hydraulic oil; Design pressure: 15 bar; Operating speed: <=5 RPM; Operating temp.: -20°C ~ +80°C
• A: Rotor interface: SAE 1-1/2" 6000 PSI; Stator interface: 2‑SAE 1" 6000 PSI; Flow orifice: Ø40; Medium: Hydraulic oil; Design pressure: 40 MPa (6000 PSI); Operating speed: <=5 RPM; Operating temp.: -20°C ~ +80°C
• B: Rotor interface: SAE 1-1/2" 6000 PSI; Stator interface: 2‑SAE 1" 6000 PSI; Flow orifice: Ø40; Medium: Hydraulic oil; Design pressure: 40 MPa (6000 PSI); Operating speed: <=5 RPM; Operating temp.: -20°C ~ +80°C

Application Scenarios

• 50‑ton class excavator electric retrofit / diesel-to-electric conversion
• Heavy-duty slew drive systems and rotating platforms
• Mining and large crawler excavators
• Cranes, material handlers and rotating attachments requiring twist-free hydraulic transfer

Why Choose This Product

• Customizable to drawing: passage count, interface sizes, orifice diameter, seal material and mounting style
• Engineering review and drawing modification support prior to order
• Strict leakage and pressure testing performed before shipment
• Compatible with hybrid and fully electric excavator architectures; suitable for OEM/ODM integration

Model / Technical Specifications

• Model: LHS225-4Y
• Anti-hose-twist design for 50T excavator electric retrofit
• Main circuits A/B design pressure: 40 MPa (6000 PSI)
• BR control/return circuits: 2 passages, 15 bar, interface G1/2"
• Rotor interface (main): SAE 1-1/2" 6000 PSI; Stator: 2 × SAE 1" 6000 PSI
• High-flow orifice for main circuits: Ø40
• Operating speed: <=5 RPM, continuous 360° rotation
• Operating temperature range: -20°C to +80°C
• Dust- and shock-resistant; stable, leak-free and maintenance-friendly