P3 Gear Pump
2 month ago
Product details
P3 Series Hydraulic External Gear Pump
P3 refers to high-pressure fixed-displacement external gear pump, widely used in HPI, Marzocchi, Parker and other brands. It also stands for peak pressure grade.
Main Technical Parameters
- Displacement: 5–120 cm³/r, common specifications: 16/20/25/32/40/50/63/80/100
- Working Pressure
- Continuous Pressure P1: 210–250 bar
- Intermittent Pressure P2: 235–270 bar
- Peak Pressure P3: 250–300 bar (short-time operation)
- Rotation Speed: 500–3000 rpm, standard 1500–2500 rpm
- Efficiency: Volumetric efficiency ≥91% at 250 bar, overall efficiency ≥85%
- Material: Aluminum alloy pump housing, cast iron end cover, nitrided alloy steel gear (HRC60+), NBR/FKM oil seal
Structure & Working Principle
- Structure: Pump body, driving & driven gear, floating side plate, wear-resistant bearing, high-pressure seal, front & rear end cover
- Principle: Positive displacement external meshing structure. Gear rotation forms vacuum to suck oil, then compresses oil for high-pressure output. Floating side plate automatically compensates axial clearance to reduce internal leakage.
Model Code Explanation (Example: HPI P3BAN2004HL10B02N)
- P3: High pressure series
- B: Mounting flange type
- A: Oil port position
- N: Rotation direction (clockwise)
- 2004: Displacement 20 cm³/r
- HL: Shaft end & seal form
- 10: Pressure grade
- B02N: Special customized configuration
Product Features
- High pressure resistance, stable operation under 250 bar continuous pressure
- Low noise & high efficiency with optimized gear profile
- Modular design, available in single, double and triple pump combination
- Strict factory testing, long service life over 15000 hours
Application Range
Construction machinery: excavator, loader, forklift, sanitation vehicle
Industrial equipment: injection molding machine, hydraulic press, hydraulic power unit, machine tool
Agricultural machinery & transport vehicles: harvester, dump truck, lifting platform
Definition of P1/P2/P3 Pressure
- P1 (Continuous): Long-term rated working pressure
- P2 (Intermittent): Short-time overload pressure
- P3 (Peak): Instant impact pressure (duration ≤1 second)
I. Product Features
1. Modular Design
The P3 series hydraulic gear pump adopts a modular structure, supporting multi-pump combinations (e.g., 2-, 3-, 4-, or 5-pump assemblies). This allows flexible configuration to meet diverse operational requirements and enhances system integration.
2. High-Pressure Performance
Certain models (e.g., P3BAN series) achieve a peak pressure of330 bar (≈33,000 kPa), making them suitable for heavy-duty applications requiring high-pressure hydraulic systems.
3. Energy Efficiency
Optimized design ensures a volumetric efficiency of up to97%, minimizing energy loss and reducing operational costs. For instance, some models maintain a volumetric efficiency of≥91%at 14 MPa.
4. Material Optimization
• Front and rear pump bodies: Cast iron for high-pressure durability.
• Central reinforcement: Aluminum alloy for fatigue resistance and extended service life.
5. Integrated Functions
Built-in components such as safety valves (high/low pressure), flow regulators, and bidirectional diverters reduce reliance on external parts, simplifying system design.
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II. Applications
1. Industrial Sector
• Construction Machinery: Hydraulic systems for excavators, cranes, etc.
• Oilfield Equipment: High-pressure water injection pumps, drilling platform hydraulic drives.
• Production Line Hydraulics: Automated manufacturing lines, injection molding machines.
2. Mobile Equipment
• Agricultural Machinery: Hydraulic drives for tractors, harvesters.
• Transport Vehicles: Hydraulic braking/steering systems for trucks, buses.
• Road Maintenance: Compactors, pavers, and other hydraulic power sources.
3. Specialized Scenarios
Complex hydraulic systems requiringhigh pressure, low energy consumption, and customized pump assemblies, such as concrete pump trucks and aerial work platforms.
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III. Technical Advantages
1. Global Standard Compatibility
Supports ISO, DIN, SAE, and other interface standards, ensuring compatibility with equipment worldwide and reducing replacement costs.
2. Load-Sensing Capability
Some models featureload-sensing (LS)technology, improving system response accuracy and optimizing energy use.
3. High Protection Rating
Designed withIP55 protection, the pump operates reliably in harsh environments (e.g., dust, humidity).
4. Wide Speed Range
Compatible with servo motor direct coupling or belt drives, supporting a speed range of1,000–3,600 rpmto meet varying power demands.
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