Duplomatic Gear Pump Series: GP, 1P, GPA
Duplomatic Gear Pump Series
Duplomatic gear pumps include external gear pumps: GP, 1P, GPA; internal gear pumps: IGS, IGP, five series in total.
1. External Gear Pumps
| Series | Size | Displacement cm³/r | Continuous Pressure bar | Peak Pressure bar | Max Speed rpm | Features |
|---|---|---|---|---|---|---|
| GP Series (Mainstream External) | GP1 | 1.3‑9.1 | 210 | 250 (310 for H version) | 5000 | Small displacement, axial compensation, available in multi-pump combinations |
| GP2 | 7‑27.9 | 210 | 250 (310 for H version) | 3600 | Medium-small flow, general industrial use | |
| GP3 | 20.7‑87.6 | 210 | 250 (310 for H version) | 3000 | Medium-large flow, cast iron pump body | |
| 1P Series (Micro External) | 1P | 1.6‑8.0 | 160‑200 | 230 | 6000 | Micro small flow, for lubrication / charge pumps |
| GPA Series (High Pressure External) | GPA1/GPA2 | 2‑61 | 230 | 260 | 3500 | High pressure version, taper shaft output, for die casting & machine tools |
GP Model Example:
GP3‑032‑R97F/20NHGP3 = frame size 3; 032 = 32 cm³/r; R = Right-hand rotation; H = High pressure version
2. Internal Gear Pumps (Low noise, preferred for servo hydraulics)
| Series | Size | Displacement cm³/r | Continuous Pressure bar | Peak Pressure bar | Max Speed rpm | Features |
|---|---|---|---|---|---|---|
| IGS Series (New Generation) | IGS2 | 8‑32 | 280 | 315 | 3000 | Low noise, radial + axial compensation, SAE flange |
| IGS3 | 12‑63 | 280 | 315 | 3000 | Widely used in injection molding & servo hydraulic systems | |
| IGS5 | 40‑162.8 | 280 | 315 | 2800 | Large flow, can be assembled as tandem pump | |
| IGP Series (Old Model Internal) | IGP3 | 3.6‑10.2 | 300 | 330 | 3600 | High pressure, strong capability for multi-pump combinations |
| IGP4 | 13.3‑32.6 | 280 | 330 | 3400 | Machine tools, high-pressure power units | |
| IGP5 | 33‑50 | 280 | 315 | 3000 | Medium-large flow | |
| IGP6 | 63‑100 | 250 | 280 | 2700 | Large displacement | |
| IGP7 | 125‑251.7 | 250 | 280 | 2500 | Extra large flow for heavy-duty equipment |
IGS Model Example:
IGS3‑025R01IGS3 = frame size; 025 = 25 cm³/r; R = Right-hand rotation; 01 = mounting code
3. Selection Notes for Each Series
- GP/GPA external pumps: Cost-effective, relatively higher noise; suffix H stands for reinforced high-pressure version. Can be made into double / triple multi-stage pumps. Radial or axial force on the shaft is not permitted.
- 1P micro pump: Mainly for lubrication and oil makeup, small flow systems.
- IGS new-generation internal gear pump: Low noise & small flow pulsation. Preferred for servo systems, replaces old IGP series.
- IGP old-type internal gear pump: Higher pressure, spare parts readily available. IGS is recommended for new projects.
4. General Operating Conditions
- Oil viscosity: 25‑100 cSt; Oil temperature: ‑15 ~ +80℃; Medium: Mineral hydraulic oil
- Rotation direction: R = Clockwise viewed from shaft end; L = Counter-clockwise viewed from shaft end
- Mounting: SAE flange, rectangular 4-bolt flange; Port thread: BSP / SAE flange ports
If you need single pump or multi-stage pump, displacement, working pressure and rotation speed, I can provide the complete order model number.
Note: The above parameters are from public catalog data. Pressure and speed vary slightly for sub-models. Please verify with the original catalog before formal purchase.
