Casappa KAPPA‑KM20 Hydraulic Gear Pump
CASAPPA Gear Pump Series: POLARIS‑PL、 POLARIS‑PH 、XHP 、KAPPA‑K/KP 、FORMULA‑FP 、MAGNUM‑HD 、WHISPER‑WSP
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KM20 is the gear‑motor designation of KAPPA Compact size 20 unit; the pump version is coded KP20. Two‑piece cast‑iron external fixed‑displacement gear unit, compact high‑pressure design for mobile hydraulics. KM = Motor, KP = Pump.
Main Specifications Table (KP20 Pump / KM20 Motor)
| Model | Displacement cm³/r | Max Continuous Pressure (bar) | Max Peak Pressure (bar) | Max loaded speed (rpm) | Max no‑load speed (rpm) | Min speed (rpm) |
|---|---|---|---|---|---|---|
| KP20‑4 / KM20‑4 | 4.95 | 285 | 330 | 3500 | 4000 | 300 |
| KP20‑6.3 / KM20‑6.3 | 6.61 | 285 | 330 | 3500 | 4000 | 300 |
| KP20‑8 / KM20‑8 | 8.26 | 285 | 330 | 3500 | 4000 | 300 |
| KP20‑11.2 / KM20‑11.2 | 11.23 | 280 | 330 | 3500 | 4000 | 300 |
| KP20‑16 / KM20‑16 | 16.85 | 270 | 330 | 3200 | 4000 | 300 |
| KP20‑20 / KM20‑20 | 21.14 | 250 | 330 | 3000 | 3800 | 300 |
| KP20‑25 / KM20‑25 | 26.42 | 230 | 330 | 2800 | 3800 | 300 |
| KP20‑31.5 / KM20‑31.5 | 33.03 | 210 | 330 | 2600 | 3600 | 300 |
Note: Continuous pressure de‑rates as displacement rises. Reversible rotation units have reduced continuous pressure rating.
Key Features
- Two‑piece compact cast‑iron housing: High rigidity, shock‑resistant, maintains good volumetric efficiency at high temperature and high pressure.
- KP = Pump; KM = Gear motor: Identical mechanical envelope, mounting flanges and shaft options for pump and motor versions, easy interchange for system design.
- Wide mounting flexibility: SAE & European‑ISO standard flanges; multiple keyed / splined shafts; side‑port or rear‑port configurations available.
- Multi‑section tandem capability: Can assemble into double / triple pump groups.
- Optional integrated cartridge valves: relief valve, anti‑cavitation valve, priority valve, load‑sensing priority valve, solenoid bypass valve to simplify external circuits.
- Low noise emission, long service life for heavy‑duty mobile equipment.
Typical Applications
- Forklifts, skid‑steer loaders
- Aerial work platforms
- Agricultural machinery
- Construction auxiliary systems
- Compact hydraulic power units
Model Code Explanation (Example: KP20‑16‑B0‑16‑Z0‑LPGD)
KP20: KAPPA‑Compact, size 20, pump;KM20: motor version16: displacement code 16.85 cm³/rB0: mounting flange code16: shaft codeZ0: port orientation codeLPGD: seal material & rotation suffix
Reference: Refer to Casappa official KAPPA‑Compact datasheet for performance curves and dimension drawings.

CASAPPA Gear Pumps
All are external‑mesh fixed‑displacement gear pumps; categorized into aluminum alloy housing and cast‑iron housing
| Series Name | Housing Material | Construction | Displacement cm³/r | Peak Pressure bar | Max Speed rpm | Key Features | Typical Applications |
|---|---|---|---|---|---|---|---|
| POLARIS‑PL | High‑strength aluminum alloy | Three‑piece | 1.07‑91.10 | 300 | 4000 | Sizes 10/20/30; single‑/double‑/triple multi‑section pumps; compatible with various integrated valves, highest versatility | Construction machinery, sanitation trucks, agricultural machinery, general mobile hydraulics |
| POLARIS‑PH | Cast iron | Three‑piece | 8.26‑33.03 | 300 | 3500 | Reinforced cast‑iron version of PL; interchangeable mounting interface with PL; low noise, high shock resistance, extended service life | Forklifts, skid‑steer loaders, heavy‑duty mobile equipment |
| XHP | Cast iron | Three‑piece helical gear | 8.06‑28.01 | 300 | 4000 | Helical‑gear design for low noise; size 20, interchangeable with PL20; multi‑section pump available | Construction machinery and on‑board hydraulics requiring low noise |
| KAPPA‑K / KP | Cast iron | Two‑piece compact | 4.95‑180.73 | 330 | 4000 | Sizes K20/K25/K30/K35/K40; K40 Plus heavy‑duty variant; wide range of flange and port options, compatible with integrated valve assemblies | Lifting equipment, construction machinery, mining auxiliary equipment |
| FORMULA‑FP | Cast iron | Two‑piece | 8.26‑150.79 | 325 | 3500 | Developed for truck PTO (Power Take‑Off); large displacement, robust construction | Dump trucks, truck‑mounted cranes, truck‑on‑board hydraulic systems |
| MAGNUM‑HD | Cast iron | Two‑piece heavy‑duty | 20‑180 | 330 | 3000 | Heavy‑duty upgraded version of KAPPA; high shock resistance for continuous harsh‑condition operation | Mining equipment, heavy‑duty engineering machinery |
| WHISPER‑WSP | Aluminum alloy | Three‑piece small‑displacement | 1.12‑6.51 | 260 | 4000 | Compact miniature low‑noise gear pump | Small agricultural machinery, fan drive, auxiliary hydraulic systems |
| FP20.11.2
FP20.16 FP20.20 FP20.25 FP20.31.5 FP20.36 FP20.40 FP20.8 FP30.100 FP30.125 FP30.17 FP30.27 FP30.34 FP30.38 FP30.43 FP30.51 FP30.61 FP30.73 FP30.82 FP40.63 FP40.73 FP40.87 HDP30.17 HDP30.22 HDP30.24 |
HDP30.27
HDP30.34 HDP30.38 HDP30.43 HDP30.51 HDP30.56 HDP30.61 HDP30.73 HDP30.82 HDP35.100 HDP35.112 HDP35.40 HDP35.50 HDP35.63 HDP35.71 HDP35.80 HDP35.90 KM20.11.2 KM20.14 KM20.16 KM20.20 KM20.25 KM20.31.5 KM20.4 KM20.6.3 |
KM20.8
KM30.27 KM30.34 KM30.38 KM30.43 KM30.51 KM30.56 KM30.61 KM30.73 KP20.11.2 KP20.14 KP20.16 KP20.20 KP20.25 KP20.31.5 KP20.4 KP20.6.3 KP20.8 KP30.27 KP30.34 KP30.38 KP30.43 KP30.51 KP30.56 KP30.61 |
KP30.73
PHM20.11.2 PHM20.14 PHM20.16 PHM20.19 PHM20.20 PHM20.24.5 PHM20.25 PHM20.27.8 PHM20.31.5 PHM20.8.26 PHP20.11.2 PHP20.14 PHP20.16 PHP20.19 PHP20.20 PHP20.24.5 PHP20.25 PHP20.27.8 PHP20.31.5 PHP20.8.26 PLM10.1 PLM10.1.5 PLM10.10 PLM10.2 |
PLM10.2.5
PLM10.3.15 PLM10.4 PLM10.5 PLM10.5.8 PLM10.6.3 PLM10.8 PLM20.10.5 PLM20.11.2 PLM20.14 PLM20.16 PLM20.19 PLM20.20 PLM20.24.5 PLM20.25 PLM20.27.8 PLM20.31.5 PLM20.4 PLM20.6.3 PLM20.7.2 PLM20.8 PLM20.9 PLM30.22 PLM30.27 PLM30.34 |
PLM30.38
PLM30.43 PLM30.51 PLM30.61 PLM30.73 PLM30.82 PLM30.90 PLP10.1 PLP10.1.5 PLP10.10 PLP10.2 PLP10.2.5 PLP10.3.15 PLP10.4 PLP10.5 PLP10.5.8 PLP10.6.3 PLP10.8 PLP20.10.5 PLP20.11.2 PLP20.14 PLP20.16 PLP20.19 PLP20.20 PLP20.24.5 |
PLP20.25
PLP20.27.8 PLP20.31.5 PLP20.4 PLP20.6.3 PLP20.7.2 PLP20.8 PLP20.9 PLP30.22 PLP30.27 PLP30.34 PLP30.38 PLP30.43 PLP30.51 PLP30.61 PLP30.73 PLP30.82 PLP30.90 SFP30.34 SFP30.43 SFP30.51 SFP30.61 SFP30.73 SFP30.82 WSP10.1 |
WSP10.1.5
WSP10.10 WSP10.2 WSP10.2.5 WSP10.3.15 WSP10.4 WSP10.5 WSP10.5.8 WSP10.6.3 WSP10.8 WSP20.10.5 WSP20.11.2 WSP20.14 WSP20.16 WSP20.19 WSP20.20 WSP20.24.5 WSP20.25 WSP20.27.8 WSP20.31.5 WSP20.4 WSP20.6.3 WSP20.7.2 WSP20.8 WSP20.9 |
Process steps:
Customer inquiry: Customers will make inquiries before placing an order to understand product details and communication needs.
Quotation: According to customer needs, provide a formal quotation, including the name, model, quantity, delivery time, payment method, etc. of the goods.
Order confirmation: After the customer confirms the quotation, a formal purchase order will be placed.
Confirm the delivery time: communicate the delivery time with the production department, inform the factory of the order details, and arrange the production plan.
Sign an export contract: After the two parties confirm that it is correct, sign an export contract to establish a trade relationship.
Implement the letter of credit (if applicable): If the payment method of the letter of credit is used, the customer needs to be urged to issue the certificate and review the contents of the letter of credit.
Export stocking: According to the requirements of the contract and the letter of credit, arrange production, purchase raw materials and packaging, and prepare the goods.
Chartering and booking: Contact the freight forwarder to make a booking and arrange the transportation of goods.
Export inspection: Apply to the quality inspection department for export commodity inspection and provide relevant documents.
Apply for a write-off slip: apply for a write-off slip from the foreign exchange management department for subsequent foreign exchange write-off.
Export declaration: Declare exports to the customs and provide documents such as power of attorney for customs declaration, customs declaration form for export goods, commercial invoice, packing list, etc.
