KP30.27-05S3-LOF/OD/30.27-LOF/OD S CASAPPA Hydraulic Gear Pump 26.7cc 300bar

Product Overview

The KP30.27-05S3-LOF/OD/30.27-LOF/OD S is a CASAPPA KAPPA 30 Series two-piece cast iron-bodied fixed displacement external gear pump. CASAPPA, as Italy‘s largest manufacturer of high-pressure gear pumps and gear flow dividers, has been a global leader in hydraulic technology since its establishment in 1952.

The KAPPA 30 Series features a two-piece high-strength cast iron housing design, with a rigid and compact structure that enables the integration of multiple functions within a limited space. The series offers displacements from 21.99 to 73.82 cm³/rev, with the KP30•27 model delivering 26.7 cm³/rev displacement. Rated pressure reaches 300 bar, with peak pressure of 320 bar, and maximum speed of 3,000 min⁻¹. The KAPPA 30 Series is widely applied in construction machinery, agricultural equipment, and material handling systems.

This product features a dual pump configuration (indicated by “/30.27” in the model code), enabling direct form-fit-function interchangeability with original CASAPPA units—no modifications to piping or mounting interfaces required. Our replacement solution strictly adheres to CASAPPA technical standards and undergoes 100% simulated in-service testing to ensure performance, reliability, and service life identical to OEM products. It is the ideal choice for hydraulic system maintenance and upgrades in excavators and other heavy construction machinery.

Technical Specifications 

Applicable Model (Primary):

• KP30.27-05S3-LOF/OD/30.27-LOF/OD S

Model Code Breakdown (per CASAPPA official documentation):

• Product Series: KP30 — CASAPPA KAPPA 30 Cast Iron Gear Pump

• Displacement Code: 27 — 26.7 cm³/rev

• Flange/Shaft Configuration: 05S3 — Specific configuration code

• Port Configuration: LOF/OD — Side inlet/outlet ports

• Second Pump Section: /30.27 — Dual pump configuration, second section same specification

• Suffix: S — Standard configuration

Reference Models:

• KP30.27-33S3-LMDMB

• KP30.27D0-05S3-LOF/OD-65M4-N-A

• KP30.27D0-83E3-LED/EB-N

• KP30.27-04S3/30.27-67/PLP20.16-EL D

Series Technical Specifications (per CASAPPA official catalog K30-01-T-C):

• Product Series: CASAPPA KAPPA 30 Cast Iron Gear Pump

• Pump Type: Fixed Displacement External Gear Pump

• Body Material: Two-Piece High-Strength Cast Iron Housing

• Mounting Standards: SAE and European Standard Flanges

• Fluid Compatibility: Mineral Hydraulic Oil

• Seals: NBR (Standard)

This Model Detailed Specifications (KP30•27):

• Geometric Displacement: 26.7 cm³/rev

• Rated Operating Pressure: 300 bar (4,350 psi)

• Peak Pressure: 320 bar (4,640 psi)

• Maximum Speed: 3,000 min⁻¹

• Minimum Speed: 350 min⁻¹

• Theoretical Flow (@3,000 rpm): Approx. 80.1 L/min

• Operating Temperature Range: -20°C to +80°C

• Recommended Fluid Viscosity: ISO VG 32 / VG 46

• Weight: Approx. 12.09 kg(single pump section reference)

Key Technical Advantages

1. Two-Piece High-Strength Cast Iron Housing for Superior Durability
The KAPPA 30 Series features a two-piece high-strength cast iron housing design, providing excellent impact resistance and dimensional stability. The cast iron construction delivers outstanding rigidity and vibration resistance, with the rigid assembly ensuring reliability and high volumetric efficiency even at high operating pressures.

2. High Pressure Capacity for Heavy-Duty Applications
The KP30•27 delivers a rated pressure of 300 bar and peak pressure of 320 bar. This high-pressure rating is maintained across the 22–46 cc displacement range, ensuring stable and reliable operation under the high-load conditions typical of heavy construction machinery.

3. Wide Speed Range for Flexible System Adaptation
The KP30 Series offers a minimum speed of just 350 min⁻¹ and a maximum speed of 3,000 min⁻¹. This broad speed range flexibly adapts to various flow requirements, performing equally well in low-speed high-torque and high-speed high-flow applications.

4. Modular Design with Flexible Dual and Multi-Pump Configurations
The KAPPA 30 Series supports single, dual, and multiple pump configurations. This model features a dual pump configuration (KP30.27 / KP30.27), delivering two independent oil sources driven by a single shaft—significantly simplifying hydraulic system layout.

5. Low-Noise Operation with Excellent Contamination Resistance
Optimized gear tooth profiles and precision housing machining effectively reduce pressure pulsation and operating noise. The robust cast iron construction combined with wear-resistant seal components provides excellent contamination resistance, extending service life in harsh operating environments.

Application Areas

• Excavators: Hydraulic working systems for small to medium excavators (boom, arm, and bucket cylinder power supply)

• Wheel Loaders: Hydraulic working systems

• Agricultural Machinery: Tractor hydraulic lift systems, combine harvesters

• Material Handling Equipment: Forklift hydraulic systems, aerial work platforms

• Construction Equipment: Road rollers, motor graders, and other heavy equipment hydraulic systems

• Industrial Hydraulic Systems: Hydraulic power sources for various industrial equipment

Expert Maintenance Tips

1. Installation Precautions

• The KAPPA 30 Series is a uni-directional rotation pump—verify that the system‘s required rotation direction matches the pump’s identification marking before installation.

• Ensure coaxial alignment between the pump and drive shaft; flexible couplings are recommended to avoid radial loads on the pump shaft.

• The suction line diameter must not be smaller than the pump inlet port; minimum speed should not fall below 350 min⁻¹ to prevent cavitation.

• For this dual pump configuration, pay special attention to the port connection orientation of both pump sections during installation.

2. Fluid Management

• Use anti-wear hydraulic oils conforming to ISO VG 32 / VG 46 standards.

• System fluid cleanliness must meet CASAPPA-recommended standards.

• Prime the pump by filling the housing with hydraulic fluid through the suction port before initial start-up. Never run the pump dry.

3. Start-Up & Commissioning

• Use jog start method for initial start-up; verify correct rotation direction before continuous operation.

• Allow the pump to run under no-load (low pressure) conditions for 2-3 minutes to purge air and ensure proper lubrication.

• Gradually increase to operating pressure while monitoring noise, temperature, and system pressure for normal operation.

4. Routine Maintenance

• The KAPPA 30 gear pump itself is maintenance-free; however, regular maintenance of the entire hydraulic system is essential for trouble-free pump operation.

• Inspect system fluid cleanliness and condition every 1,000-2,000 operating hours.

• Regularly replace return line filters and suction strainers to prevent contaminant ingress into the pump body.