KP20/KP30/KP35/KP40 Series Product Introduction

CASAPPA KAPPA Series KP20/KP30/KP35/KP40 are two-piece cast iron high-pressure gear pumps, which can also be used as gear motors. Designed mainly for mobile construction machinery and heavy-duty industrial hydraulics, they feature cast iron construction for high pressure resistance and long service life. Single pump or multi-pump combinations are available. KP20, KP30, KP35 and KP40 represent four different size groups with progressively increasing displacements.

✅ Core Features

1. Two-piece cast iron housing: High-strength cast iron, shock and vibration resistant, suitable for harsh working conditions, different from the aluminum alloy PL POLARIS series.
2. High pressure rating: Maximum peak pressure up to 330 bar, high continuous working pressure, and good volumetric efficiency at high temperatures.
3. Low-noise design: Precision gear pairs and sliding bearing structure for quiet operation.
4. Modular design: Multi-pump configurations (tandem design with common inlet) are available; different pump groups can be combined. Integrated valves are optional, including relief valves, anti-cavitation valves, load-sensing priority valves, bypass solenoid valves, saving installation space for hydraulic valves.
5. Wide range of port options: SAE, DIN and European standard flanges and ports, spline / straight key shafts to fit global machine mounting standards.
6. Long service life: External support bearings with strong radial load capacity; custom seals available for low temperature or special media applications.

📌 Brief Description of Each Series

KP20 (Small Displacement Group)

• Displacement: 4.95～25 cm³/rev
• Max continuous pressure: 280 bar; Max peak pressure: 330 bar
• Max speed: 4000 rpm
• Positioning: Small hydraulic power source for auxiliary hydraulics, steering and braking systems; widely used as front pump in multi-pump assemblies.
• Applications: Small construction machinery, sanitation vehicles, agricultural machinery auxiliary pumps, forklift auxiliary pumps.

KP30 (Main Group for Medium-Small to Medium Displacement)

• Displacement: 17～73 cm³/rev
• Continuous pressure: 230～300 bar; Max peak pressure: 325 bar
• Max speed: 3000 rpm
• Positioning: Best-selling model of KAPPA series, general heavy-duty main pump with abundant model variants (KP30.34, KP30.61, KP30.73, etc.)
• Applications: Skid steer loaders, forklifts, mini excavators, crane auxiliary pumps, concrete equipment.

KP35 (KAPPA Compact, upgraded compact version of KP30)

• Displacement: 63～91 cm³/rev
• Continuous pressure: 245～260 bar; Max peak pressure: 275 bar
• Max speed: 3000 rpm
• Positioning: Compact heavy-duty pump with two-piece cast iron structure. Shorter overall length than KP30 at the same displacement, ideal for machines with limited installation space.
• Applications: Construction machinery with confined mounting space, special vehicles, aerial work platforms.

KP40 / KP40 Plus (Large Displacement Heavy-Duty Flagship Group)

• Displacement: 61～180.73 cm³/rev
• Continuous pressure: 200～260 bar; Max peak pressure up to 330 bar. KP40 Plus reinforced version for extreme heavy-duty conditions.
• Max speed: 2800 rpm (reduced speed for large displacement models)
• Positioning: High-flow main hydraulic pump for heavy mobile equipment.
• Applications: Large loaders, mining auxiliary equipment, heavy dump trucks, heavy sanitation equipment.

📋 Model Naming Example

KP30.34-A8K9

• KP: KAPPA cast iron gear pump
• 30: Size group (20/30/35/40)
• 34: Theoretical displacement 34 cm³/r
• A8K9: Configuration codes for shaft type, flange, port orientation, seal and rotation direction, etc.

🛠️ Typical Application Sectors

• Construction machinery: Forklifts, skid steer loaders, aerial work platforms, mini excavators, truck-mounted cranes
• Special vehicles: Sanitation trucks, dump trucks, fire trucks, hydraulic systems for engineering trucks
• Agricultural machinery, mining auxiliary equipment, stationary heavy-duty hydraulic power units
• Multi-pump assemblies: One power source to drive multiple hydraulic circuits (working + steering + cooling) for construction machinery.