Ronzio Group 1 Aluminium Gear Pump
The Ronzio Z1 is a compact, high-speed micro gear pump covering 12 displacement sizes from 1.08 to 8.82 cm³/rev. With no-load speeds up to 8,000 rpm and continuous working pressures up to 300 bar on the smaller displacements, it is suited to pilot circuits, small power units, auxiliary hydraulic functions, and light mobile applications. Available as a pump or hydraulic motor in single or multiple-pump configurations, with cross-series tandem assemblies possible alongside Z2 and Z3.
Key Specifications
- Displacement: 1.08–8.82 cm³/rev (12 sizes: types 11–88)
- Max continuous working pressure (P1): 300 bar (types 11–26) down to 120 bar (type 88) — cast iron covers
- Max peak pressure: 350 bar (types 11–26) down to 150 bar (type 88) — cast iron covers
- Volumetric efficiency: 95% average
- Max shaft speed, no load: 8,000 rpm (types 11–26) down to 4,000 rpm (types 78–88)
- Max shaft speed at P1 pressure: 8,000 rpm (types 11–16) down to 3,500 rpm (type 88)
- Min shaft speed at P1 pressure: 1,100 rpm (type 11) down to 400 rpm (types 48–88)
- Operating temperature: –10°C to 80°C
- Oil viscosity: 20–120 mm²/s (cSt); max starting viscosity 700 mm²/s (cSt)
- Compatible fluid: Mineral hydraulic oil (DIN 51524)
- Clockwise, anti-clockwise, and bi-directional rotation options
- Single, tandem, and multiple pump/motor configurations
- Cross-series tandem assemblies available (Z1/Z2 and Z1/Z3)
Configuration Options
- Flanges: European (A0), SAE "A" (B2), SAE "B" (B3), German (C4), European Gr. 3.5 (D5)
- Shafts: tapered 1:8, tapered 1:5, SAE "B" splined, SAE "B" straight 7/8", cylindrical Ø22 mm, SAE "B" straight 1", tapered Gr. 3.5, SAE 15-tooth
- Ports: European, German, BSPP, O-Ring Boss, SAE 3000 psi
- Shaft seals: standard and reinforced (5 bar) NBR or Viton; 25 bar NBR, PTFE, or Viton; double-seal NBR or Viton options
- High-temperature Viton seals available
Note: Pressure ratings above are for the cast iron cover configuration. Alloy cover variants carry lower maximum pressure ratings — refer to the Ronzio Z1 catalogue for full alloy cover data. For bi-directional pumps and motors, maximum pressure is reduced by 15%.
