G5-25-1E13S-20R Gear Pump | 210 Bar High Pressure

Product Overview:

Engineered for demanding mobile machinery and heavy-duty industrial applications, the G5-25-1E13S-20R series high-pressure gear pump (covering the complete G5-5 to G5-30 displacement range) combines a robust ductile-iron housing with precision-machined gear sets. Designed to deliver exceptional volumetric efficiency and superior shock resistance, this series offers true drop-in interchangeability with major OEM specifications (such as Parker/Commercial G5). Backed by 100% simulated operating condition testing, it ensures reliable performance, reduced downtime, and lower maintenance costs in harsh hydraulic environments.

Technical Specifications

• Model Code: G5-25-1E13S-20R (Full series spans G5-5/6/8/10/12/16/20/25/30)

• Displacement: 5 ml/rev to 30 ml/rev (Specific model G5-25: 25 ml/rev)

• Rated Working Pressure: 21 MPa (210 bar)

• Peak Pressure: 25 MPa (250 bar)

• Speed Range: 500 – 3000 RPM

• Rotation: Clockwise (20R; Counter-clockwise 20L optional)

• Porting: SAE standard flange / threaded ports (per 1E13S configuration code)

• Housing Material: High-strength ductile iron casting with alloy steel gears

• Drive Shaft: Standard parallel key or spline options

• Recommended Oil Viscosity: 10 – 200 cSt (Optimum: 30 – 50 cSt)

• Filtration Requirement: 25 microns (μm) or finer recommended

Key Technical Advantages:

• High Volumetric Efficiency: Utilizes advanced floating side-plate pressure compensation technology and optimized tooth geometry to maintain over 92% volumetric efficiency under high pressure and temperature, minimizing internal leakage.

• True OEM Interchangeability: Mounting dimensions, pilot diameters, shaft extensions, and port configurations strictly adhere to international heavy-duty standards, allowing direct replacement without modifying existing piping or brackets.

• 100% Simulated Working Tests: Every single pump undergoes rigorous full-load pressure, displacement, and thermal simulation testing on automated test benches prior to shipment, guaranteeing zero-defect reliability.

• Exceptional Durability & Shock Resistance: Equipped with heavy-duty needle bearings and carburized alloy steel gears, providing outstanding resistance to hydraulic pressure spikes and significantly extending service life in severe duty cycles.

Application Areas:

• Mobile Machinery: Crawler excavators, wheel loaders, road rollers, graders, and other heavy-duty steering or working hydraulic circuits.

• Agricultural Equipment: High-horsepower tractors, combine harvesters, and forestry machinery auxiliary implement pumps.

• Industrial Hydraulic Systems: Injection molding machines, hydraulic presses, metallurgical power units, and machine tool auxiliary systems.

• Special Vehicles: Truck-mounted cranes, aerial work platforms, refuse compactors, and fire-fighting vehicle hydraulic power units.

Expert Maintenance Tips:

• Pre-Lubrication Protocol: Prior to initial startup, fill the pump housing completely with clean anti-wear hydraulic oil through the drain/fill port. Dry running is strictly prohibited to prevent instant damage to internal bearings and side plates.

• Fluid Cleanliness Management: Maintain hydraulic fluid cleanliness at ISO 4406 18/15/13 or better using high-efficiency filtration. Regularly monitor and replace filter elements to prevent particulate contamination and scoring of internal components.

• Alignment Precision: Ensure the concentricity between the prime mover shaft and the pump drive shaft is within 0.05 mm using flexible couplings. Avoid any external radial or axial loads on the shaft extension to prevent premature seal failure and bearing wear.