Casappa KP40 (KAPPA 40) High Pressure Cast Iron Gear Pump
Casappa KP40 (KAPPA 40) High Pressure Ductile Iron Gear Pump
KP40 Plus is heavy-duty version with ductile iron housing. Through-shaft design for multi-section pump combinations. 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 |
|---|---|---|---|---|---|
| KP40.63 | 61.43 | 260 | 300 | 2800 | 300 |
| KP40.73 | 72.60 | 260 | 300 | 2800 | 300 |
| KP40.87 | 86.56 | 260 | 300 | 2800 | 300 |
| KP40.100 | 99.79 | 260 | 300 | 2700 | 300 |
| KP40.109 | 108.90 | 260 | 300 | 2700 | 300 |
| KP40.121 | 121.80 | 260 | 300 | 2700 | 300 |
| KP40.133 | 134.03 | 250 | 290 | 2700 | 300 |
| KP40.151 | 150.79 | 240 | 280 | 2700 | 300 |
| KP40.160 | 160.77 | 230 | 270 | 2500 | 300 |
| KP40.180 | 180.73 | 230 | 270 | 2200 | 300 |
Note: KP40 Plus is the reinforced heavy-duty variant with ductile iron housing, higher impact resistance for heavy-duty mobile machinery main hydraulic circuits. Larger displacements have slightly reduced continuous pressure rating.
2. General Mechanical & Hydraulic Specifications
- Housing Material: Ductile cast iron (KP40 Plus, two-piece construction)
- Bearings: Pressure-compensated sliding thrust bearings for sustained high volumetric efficiency under heavy loads
- 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. KP40 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 150 bar, 2000 rpm, VG46 @50℃)
- Volumetric efficiency: ≥90%
- Overall efficiency: 82%~86% (depends on displacement, pressure and speed)
3. Outline Weight Reference (standard flange, side ports, parallel key version)
| Model | Weight (kg) |
|---|---|
| KP40.63 ~ KP40.87 | approx.10.2~11.0 kg |
| KP40.100 ~ KP40.133 | approx.11.2~12.2 kg |
| KP40.151 ~ KP40.180 | approx.12.5~13.5 kg |
Weight varies slightly with port and shaft configuration. Exact outline & mounting dimensions refer to original manufacturer drawings.
4. Model Code Explanation (Example: KP40.63D0-82E2-LEB/EA-N)
- KP: KAPPA gear pump
- 40: Group 40
- 63: Nominal displacement 61.43 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.
