Gear oil pump PGH Series PGH4-30/040RE11VE4

📄 Product Description

🔧 The quality Gear oil pump PGH Series PGH4-30/040RE11VE4 is engineered by Hengmeisi – a leading China manufacturer and factory direct supplier. Hengmeisi provides our engineered equivalent model and genuine Rexroth devices to meet diverse high-pressure hydraulic needs. Rated at 350 bar continuous pressure, this internal gear pump delivers superior volumetric efficiency, ultra-low pulsation, and long service life for industrial-grade applications.

Product Advantages

⚙️ Internal Gear vs. External Gear & Vane Pump Designs

Unlike traditional external gear pumps or vane pumps, the Gear oil pump PGH Series PGH4-30/040RE11VE4 uses precision internal gearing to minimize flow pulsation and noise. It eliminates gear meshing losses and offers smoother, quieter operation with higher pressure capability and efficiency.

📊 Integrated Clearance Compensation Control

The built-in pressure-compensated plate automatically adjusts to compensate for wear and thermal expansion. This maintains high volumetric efficiency over time, ensuring stable power output far beyond fixed-clearance pump designs.

🛡️ Premium Materials for Extreme Durability

Gear & Housing: High-strength cast iron and alloy steel, precision-machined for low wear and high pressure resistance.

Shaft Seal: High-performance FKM composite, rated for wide temperature ranges and leak-free operation at 350 bar.

Bearings: Heavy-duty anti-friction bearings handle radial loads at high speeds, extending service life.

🧹 Built-In Contamination Tolerance

The robust internal design resists damage from minor hydraulic oil impurities, critical for long-term reliability in harsh industrial environments where fluid cleanliness may vary.

Model Code

📝 The model code PGH4-30/040RE11VE4 has a clear and intuitive coding logic, easy for purchasers to quickly identify parameters without deep hydraulic knowledge:

PGH4: High-pressure internal gear pump series, distinguishing from external gear and vane pump series;

30: Series version for improved efficiency and low-noise operation;

040: Rated displacement of 40 cm³/rev, ideal for medium-flow high-pressure systems;

R: Clockwise rotation (viewed from shaft end);

E: Standard flange mounting conforming to ISO 3019-2;

11: Seal and configuration version;

VE4: FKM seal variant with optimized shaft and port specifications.

💡 As a core model in the PGH series, the Gear oil pump PGH Series PGH4-30/040RE11VE4 is specially optimized for high-pressure, low-noise industrial scenarios. With outstanding performance, it is widely favored by global purchasers in high-end machinery, metal forming, and machine tool applications.

Product Structure

🏗️ 1. Core Architecture: Precision Internal Gear Assembly

Fundamentally different from external gear and vane pump designs, it consists of high-precision internal gear pair, cast iron housing, pressure-compensated plate, and integrated shaft seal.

⚖️ 2. Compensation Mechanism: Pressure-Controlled Clearance System

The floating side plate adjusts automatically to pressure changes, compensating for wear and maintaining tight clearances for consistent efficiency.

🔩 3. Material Upgrades:

Gear Set: High-grade alloy steel, heat-treated and precision-ground for low friction and wear resistance.

Housing: High-density cast iron with excellent pressure-bearing capacity and rigidity.

Seals: FKM composite material, resistant to high pressure and wide temperature range.

🔇 4. Noise Reduction & Contamination Protection:

Optimized internal gear profile reduces fluid pulsation and operating noise.

Robust internal design protects against minor oil impurities, preventing premature wear.

Application Scenarios

🏭 High-end CNC machine tools – large machining centers, precision forming presses

🏗️ Metallurgical machinery – high-pressure rolling mills, continuous casting lines

🧪 Plastic & rubber machinery – injection molding machines, hydraulic presses

⚙️ Industrial hydraulic power units – high-pressure stationary and mobile applications

🔧 General industrial equipment – systems requiring low-noise, pulsation-free power delivery