Casappa KP30 (KAPPA 30) High Pressure Cast Iron Gear Pump
Casappa KP30 (KAPPA 30) High Pressure Cast Iron Gear Pump
KP30 is a compact cast iron external gear pump. Through-shaft design allows multi-section assembly. Side or rear port options; SAE / European standard flanges available. Units: cc/rev = cm³/r; bar; rpm. Continuous pressure = long-term allowable working pressure; Peak pressure = short-time shock pressure, NOT for continuous operation.
1. Pressure & Speed for each displacement
| Model | Displacement cc/rev | Continuous Pressure bar | Peak Pressure bar | Max Speed rpm | Min Continuous Speed rpm |
|---|---|---|---|---|---|
| KP30.43 | 43.98 | 230 | 260 | 3000 | 350 |
| KP30.46 | 46.34 | 210 | 240 | 3000 | 350 |
| KP30.56 | 56.54 | 190 | 220 | 2500 | 350 |
| KP30.61 | 61.26 | 180 | 220 | 2500 | 350 |
| KP30.73 | 73.82 | 170 | 220 | 2500 | 350 |
Note: Larger displacements have lower rated continuous pressure. This compact series is designed for medium pressure, medium-high flow mobile machinery applications.
2. General Mechanical & Hydraulic Specifications
- Housing Material: Cast iron, compact construction
- Bearings: Pressure-compensated sliding thrust bearings to maintain high volumetric efficiency
- Rotation: Standard clockwise (viewed from drive end); counter-clockwise available on request, specify in order code
- Drive Shaft Options
- Parallel key shaft
- 1:8 taper shaft
- SAE splined shaft (optional)
- Mounting Flange: 4-hole European standard flange; SAE flange optional
- Port Arrangement: Side outlet (L series) or rear outlet (R series); flange type ports
- Multi-pump capability: Through-shaft design. KP30 can be cascaded with KP20 / KP30 / KP40 to form multi-section pumps.
Fluid, Temperature & Contamination
- Recommended hydraulic fluid: Mineral hydraulic oil ISO VG32 / VG46
- Operating temperature: -20℃ ~ +80℃; short-time peak up to 90℃
- Recommended viscosity during operation: 15～100 mm²/s; max 500 mm²/s allowed for cold start
- Fluid cleanliness: ISO 4406 18/15 or better. Inlet filter ≥100μm recommended; pressure line filter 10μm
- Seals: NBR nitrile rubber (standard). FKM fluorocarbon seals optional for high temperature / fire-resistant fluids (special order)
Typical Efficiency Values (at rated working condition, VG46 @50℃)
- Volumetric efficiency: ≥91%
- Overall efficiency: 83%~87% (depends on displacement, pressure and speed)
3. Outline Weight Reference (standard flange, side ports, parallel key version)
| Model | Weight (kg) |
|---|---|
| KP30.43 ~ KP30.46 | approx.6.5~6.9 kg |
| KP30.56 ~ KP30.61 | approx.7.0~7.4 kg |
| KP30.73 | approx.7.5~7.9 kg |
Weight varies slightly with port and shaft configuration. Exact outline & mounting dimensions refer to original manufacturer drawings.
4. Model Code Explanation (Example: KP30.43D0-82E2-LEB/EA-N)
- KP: KAPPA gear pump
- 30: Group 30
- 43: Nominal displacement 43.98 cc/rev
- D0: Flange code (4-hole European flange)
- 82E2: Shaft code, parallel key shaft
- LEB/EA: Port code, side ports, inlet / outlet port size
- N: Rotation code: clockwise (viewed from drive end)
5. Important Selection Notes
- Peak pressure applies only for short-duration shock, cannot run continuously. Design system based on continuous pressure for sizing.
- Do NOT operate at maximum speed together with maximum continuous pressure simultaneously; derating required otherwise service life reduces drastically.
- Suction condition: Vacuum at inlet should not be worse than -0.05 bar to avoid cavitation. Suction piping should be short and large bore.
- Data extracted from Casappa official datasheet. Final selection and acceptance shall refer to original Casappa PDF datasheet; agent data for reference only.
