NACHI IPH Series Gear Pump

NACHI IPH Series Gear Pump

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 3 year year

Product details

NACHI IPH Series Gear Pump: Technical Deep Dive & Application Guide

(Internal Gear Pump High-Pressure Series)

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1. Core Design Principles

A. Structural Breakdown

• Gear Pair:

• Outer Gear (Driving Gear): Helical-toothed design for smooth rotation.

• Inner Gear (Driven Gear): Crescent-shaped gear with 5–7 teeth (model-dependent).

• Key Advantages:

• Low Pulse Flow: Helical gears reduce flow ripple by >80% vs. traditional spur gears.

• Self-Priming: Can operate with suction pressures as low as0.3 bar(critical for vertical installations).

B. Efficiency Curves

【表格】

Parameter IPH-2A (2.1 cc/rev) IPH-6C (15.2 cc/rev)

Volumetric Eff. 92% (rated) 90% (rated)

Mechanical Eff. 88% (1800 RPM) 85% (1800 RPM)

Total Eff. 81% (rated load) 76% (rated load)

Note: Efficiency drops ~5% when operating at ≤50% rated flow.

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2. Model-Specific Specifications

A. Flow Rate & Pressure Range

【表格】

Model Flow (cc/rev) Max Pressure (bar) Typical Use Case

IPH-2A 2.1–5.0 250 Small CNC machines

IPH-4B 4.2–12.0 250 Plastic injection

IPH-6C 15.2–30.0 250 Press machinery

IPH-8D 35.0–60.0 210 Mining excavators

B. Mounting & Interface Standards

• Port Sizes: SAE 4-bolt (standard), DIN 24° taper (optional).

• Shaft Configurations:

• Straight Shaft: For direct coupling to electric motors.

• Splined Shaft: For torque-critical applications (e.g., wind turbines).

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3. Performance Benchmarks vs. Competitors

A. Noise Level Comparison

【表格】

Pump Type Noise (dB @ 1800 RPM) Key Differentiator

NACHI IPH-4B 68 Helical gear damping

Yuken PV2R2 75 Spur gear resonance

Parker PGP315 72 Noise-reduction baffle

Application Impact: IPH pumps enable30% longer hydraulic line lifedue to reduced cavitation noise.

B. Energy Efficiency

• IPH vs. Vane Pumps:

• IPH-6C: 90% efficiency at 1800 RPM (vane pumps: ~85%).

• Cost Saving: $1,200/year in electricity for a 20 kW system (10% energy reduction).

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4. Maintenance & Troubleshooting

A. Critical Failure Modes

【表格】

Failure Root Cause Solution

Gear Wear Low oil viscosity (<15 cSt) Switch to ISO 46 hydraulic oil

Shaft Seal Leak Over-tightening (≥120 Nm) Follow torque specs (80–100 Nm)

Cavitation Noise Inlet pressure <0.5 bar Install suction accumulator

B. Recommended Service Intervals

• Oil Filter: Replace every1,000 hours(β10 ≥ 200 filter required).

• Shaft Seals: Replace every5,000 hours(or after 3 seal leaks).

• Gear Inspection: Annual for ≥6-year-old pumps.

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5. Upgrade Paths for Existing Systems

A. Retrofit Recommendations

【表格】

Original Pump IPH Replacement Benefits

Yuken PV2R2-10 IPH-2A-32 30% lower noise, 15% higher efficiency

Parker PGP320 IPH-4B-40 20% smaller footprint, 10% lower power draw

B. Arctic/Desert Modifications

• Arctic Kit (-40°C):

• Preheater: 1 kW inline heater for oil.

• Viscosity Control: ISO 32 oil + thermal insulation.

• Desert Kit (+60°C):

• Cooling Fan: Forced-air cooling (reduces oil temp by 15°C).

• High-Viscosity Oil: ISO 68 oil for extended life.

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6. Technical Cross-References

A. OEM Part Numbers

【表格】

Model NACHI Part No. Equivalent Aftermarket Warranty

IPH-2A NACHI-IPH-2A-32 Hydac HGP-2A 2 years

IPH-6C NACHI-IPH-6C-40 Sunfab SGP-6C 1 year

Warning: Aftermarket pumps may void warranty if not NACHI-certified for pressure/flow compatibility.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 Audited supplier

3 year

Address: Ningbo, China

Main Product: hydraulic motor, gear box, hydraulic pump, hydraulic valve , hydraulic winch, hydraulic system

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