KP30.43 Casappa Kappa 30 Gear Pump 43.98cm³ 250bar

Product Overview

The KP30.43 and KP30.51 models belong to the Casappa Kappa 30 series of external gear pumps. Featuring a high-strength two-piece cast iron housing, these pumps are engineered for medium-to-high pressure hydraulic systems. They offer excellent interchangeability for direct OEM replacement of original Casappa Kappa 30 units and equivalent brands. Every pump undergoes 100% simulated duty-cycle testing to guarantee volumetric efficiency, pressure stability and service life matching factory standards. Available as single units or in multiple configurations with PLP20 sections, they are ideal for truck PTO, mobile machinery and industrial hydraulic circuits.

Technical Specifications 

• Model: KP30.43 / KP30.51 (series includes multiple-pump configurations)
• Typical ordering codes: KP30.43-8K9-LME/GF-55-CSL/20, KP30.51D0-06S8-LME/OF-N-CSC, KP30.43-A8K9-LEF/EB-45/PLP20
• Displacement: KP30.43 = 43.98 cm³/rev (2.68 in³/rev); KP30.51 = 51.83 cm³/rev (3.16 in³/rev)
• Continuous/rated pressure (p1): KP30.43 up to 250 bar (3625 psi); KP30.51 up to 230 bar (3335 psi)
• Intermittent pressure (p2): KP30.43 up to 270 bar (3915 psi); KP30.51 up to 250 bar (3625 psi)
• Peak pressure (p3): KP30.43 up to 290 bar (4205 psi); KP30.51 up to 270 bar (3915 psi)
• Maximum speed: KP30.43 = 3000 min⁻¹; KP30.51 = 2500 min⁻¹
• Minimum speed: 350 min⁻¹
• Rotation/control: unidirectional (S = left/CCW or D = right/CW); reversible options available
• Drive shaft: common SAE B spline (A8/04 etc.), European tapered 1:8, SAE C and others
• Mounting flange: SAE B (K9/S3 etc.), European standard, SAE C (S6/S8 etc.)
• Ports: side or rear, LME/GF, LEF/EB, OF and other threaded/flanged configurations
• Seals: standard NBR (N); Viton and other options available
• Body type: CSL, CSC, HSC etc. (standard/compact/high-performance versions)
• Approximate weight: 10–15 kg depending on configuration and multiple sections
• Fluid: mineral-based hydraulic oil (HL/HLP), recommended viscosity 20–100 cSt

Data extracted from official Casappa Kappa 30 technical catalogues. Pressure and speed ratings vary slightly by housing version and multiple-pump setup; always refer to the specific ordering code and corresponding manual. Reversible pumps typically have approx. 15% lower pressure ratings.

Key Technical Advantages

1. High-strength two-piece cast iron housing and precision machining: Rigid construction combined with surface-hardened and ground gears, optimized tooth profile and controlled clearances delivers high volumetric efficiency and low pressure losses under continuous medium-to-high pressure duty.
2. High volumetric efficiency with low-noise design: Optimized internal flow paths and bearing support reduce operating noise and vibration, improving overall system efficiency and operator comfort.
3. Long-life bearings and thrust plate options: Quality plain bearings with optional bronze thrust plates provide strong contamination resistance and extended service life, lowering maintenance costs.
4. Excellent interchangeability and modular multiple-pump design: Flanges, shaft ends and ports fully match original Casappa units. Supports tandem and multiple configurations with PLP20 sections for easy drop-in replacement and system expansion.
5. 100% simulated duty-cycle testing: Every unit is pressure-, flow- and speed-tested under real operating conditions to ensure consistent performance and high reliability.

Application Areas

• Truck and commercial vehicle PTO-driven hydraulic systems
• Construction machinery (loaders, excavator auxiliary circuits, cranes, concrete pumps)
• Agricultural and forestry equipment
• Industrial hydraulic power units, presses and injection moulding auxiliaries
• Material handling, port and mining machinery

Expert Maintenance Tips

1. Verify rotation direction before installation (S = counterclockwise when viewed from the shaft end). Fully prime the suction line and purge air to avoid dry running and early wear.
2. Use hydraulic fluid meeting ISO 4406 19/17/14 cleanliness or better. Change filters regularly to prevent contamination damage to gears and bearings.
3. Tighten the shaft-end nut to approximately 70 Nm (confirm for specific shaft type) to avoid seal failure from over- or under-tightening.
4. After start-up, check for leakage and abnormal noise. Keep continuous operating temperature between -25 °C and 80 °C (peak ≤ 100 °C). Select special shaft seals for high back-pressure applications.
5. For multiple-pump configurations, ensure the sum of section torques does not exceed the drive shaft rating. For long-term storage, run briefly under light load and replace with fresh fluid to prevent internal corrosion.