NACHI IPH series gear pump

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Description

NACHI IPH Series Gear Pump Specifications

Product Features

  • A patented axial and radial pressure loading system ensures high efficiency, with a maximum operating pressure of up to 30MPa (306 kgf/cm²).
  • Excellent durability and an exceptionally long service life, suitable for continuous operation in harsh working conditions.
  • Modified involute short-tooth gear design realizes internal gearing, significantly reducing pulsation and noise for ultra-quiet operation.
  • Simple structural design facilitates convenient maintenance and inspection, lowering downtime and maintenance costs.
  • All pump types are installation-compatible with previous designs, enabling easy replacement and upgrade.

Core Specifications

Model No.
Capacity (cm³/rev)
Rated Pressure (MPa)
Max. Operating Pressure (MPa {kgf/cm²})
Min. Revolution Speed (min⁻¹)
Max. Revolution Speed (min⁻¹)
Weight (kg) – Type A
Weight (kg) – Type B
IPH-2A(B)-×-11
3.60
25
30 {306}
600
2000
4.4
2.4
5.24
4.5
2.5
6.55
4.6
2.6
8.18
4.8
2.8
IPH-3A(B)-×-20
10.2
25
30 {306}
600
2000
10.5
4.8
13.3
10.7
5.0
15.8
11.0
5.3
IPH-4A(B)-×-20
20.7
25
30 {306}
500
2000
15.2
9.5
25.7
15.7
10.0
32.3
16.2
10.5
IPH-5A(B)-×-21(11)
40.8
25
30 {306}
400
2000
32.0
19.0
50.3
33.0
20.0
63.9
34.0
21.0
IPH-6A(B)-×-21(11)
81.3
25
30 {306}
300
2000
62.0
39.0
101.6
64.0
41.0
125.9
66.0
43.0

Model Number Explanation

Example: IPH – 4B – 25 – LT – 20
  • IPH: Series name
  • 4: Pump size (2, 3, 4, 5, 6)
  • B: Mounting method (A: Foot type; B: Flange type)
  • 25: Capacity (cm³/rev)
  • L: Rotation direction (None: Clockwise viewed from shaft end; L: Counterclockwise viewed from shaft end)
  • T: Auxiliary symbol (T: With screw-in type flange kit; E: With welded type flange kit; auxiliary symbols must be in alphabetic order)
  • 20: Design number (11: 2A(B), 5B, 6B; 20: 3A(B), 4A(B); 21: 5A, 6A)

Important Notes

  1. Capacity refers to the logical discharge rate per rotation.
  2. Suction pressure range: +0.02 to +0.3 MPa (-0.2 to +0.3 kgf/cm²).
  3. The maximum working pressure indicated is the limit for conditions with frequent pressure changes.
  4. Avoid installing the pump with the suction port facing downward.
  5. Specify the model number in the format above when pipe flanging is required.
  6. Hydraulic fluid: Use R&O type and wear-resistant ISO VG 32 to 68 (viscosity index ≥ 90) or equivalent. The kinematic viscosity during operation should be 20 to 150 mm²/s.
  7. Operating temperature range: 5 to 65 °C. If the oil temperature at startup is ≤ 5 °C, perform warm-up operation at low pressure first.

Supplementary Specifications (Partial Models)

For model IPH-6B-125-11:
  • Material: Cast iron
  • Maximum operating pressure: 4350 psi
  • Pressure rating: 3045 psi
  • Shaft side discharge rate: 24.8 to 38.7 GPM

Shipping & Delivery

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