Kracht KF5/250 H10B P0A 0DP1 Hydraulic Gear Pump

Kracht KF5/250 H10B P0A 0DP1 Hydraulic Gear Pump

The Kracht KF5/250 H10B P0A 0DP1 is an external positive displacement gear pump engineered for heavy-duty fluid transfer, forced lubrication circuits, and low-to-medium pressure hydraulic circuits in marine machinery and industrial processing plants.

Manufactured with high-grade grey cast iron (EN-GJL-250) and case-hardened helical gear sets, the KF 5 series features an optimized displacement chamber geometry designed to minimize pressure pulsation and keep operational noise below 71–78 dB(A) even when handling aeration-prone or high-viscosity mineral oils. With a nominal displacement of 255.4 cm³/rev and continuous duty capability up to 25 bar (363 psi), this unit delivers high volumetric and mechanical efficiency across speed ranges from 200 rpm to 2,000 rpm.

Technical Details:

Key Features

1. Optimized Helical Tooth Profile: Precision ground helical gears drastically curb high-frequency mesh rattle, reduce displacement pulsation, and suppress acoustic noise to sub-78 dB(A) levels.
2. High Viscosity Pumping Envelope: Safely transports heavy engine oils, marine fuel residuals (MDO/HFO), gearbox lubes, and thermal fluids from 12 to 20,000 cSt without risk of cavitation down to -0.4 bar intake.
3. FKM (Viton®) Elastomer Pack: Equipped with high-temperature, chemically inert fluoropolymer seals rated up to 150 °C for extended lifecycle against synthetic gear oils and aggressive additives.
4. Low Friction Multi-Layer Plain Bearings: DP4 composite bronze-PTFE bushings lubricated by the pumped medium deliver continuous hydrodynamic lift without external oil lines.
5. Direct Motor Bellhousing Compatible: P0 cylindrical shaft without outboard bearing interfaces seamlessly with standard DIN/IEC bellhousings and flexible claw/pin couplings.

Applications

• Main Engine Pre-Lubrication & Continuous Circulation: Dedicated lubrication oil pump for marine two-stroke and four-stroke crosshead/trunk piston propulsion engines (e.g., MAN B&W, WinGD, Wärtsilä).
• Marine Propulsion Gearboxes: Primary shaft-driven or auxiliary AC motor-driven lubrication units for reduction gearing, reverse clutches, and thrust bearings (RenK, Flender, Reintjes).
• Fuel Oil Transfer Skid Modules: Bulk transfer and feeding units for Marine Diesel Oil (MDO), Low Sulfur Heavy Fuel Oil (VLSFO), and marine distillates.
• Industrial Hydraulics & Power Units: Low-pressure, high-volume charge pumps, offline kidney-loop filtration stations, and cooler circulating loops in rolling mills and injection presses.
• Wind Turbine Main Bearings & Transmissions: Forced-feed continuous lubrication stations inside high-capacity wind turbine nacelles.

Part Number Cross-References & Compatibility

• Direct Exact Replacements:
• Kracht KF5/250 H10B P0A 0DP1
• Kracht KF5/250H10BP0A0DP1
• Kracht KF 5 / 250 – H10B-P0A-0DP1

Frequently Asked Questions

What does the P0 code indicate on the Kracht KF5/250 pump?

The P0 code specifies a standard cylindrical keyed drive shaft without an outboard bearing. It is designed exclusively for direct in-line drive applications using a flexible shaft coupling and an electric motor bellhousing. It cannot accept radial chain or belt side loads.

Can the Kracht KF5/250 H10B be run in counter-clockwise (CCW) rotation?

No. The “1” in H10B dictates single-direction clockwise (CW) rotation. Running this model in reverse pressurizes the shaft seal cavity, causing immediate seal failure and oil leaks. If you require counter-clockwise rotation, source the KF5/250 H20B model.

Does this pump include an integrated safety relief valve?

No. The “0A” designation signifies that this pump is supplied with a blank end cover without an internal pressure relief valve. A dedicated external in-line relief valve (such as a Kracht SPV or SPVF valve) must be plumbed into the discharge piping upstream of any isolation valves to protect the pump from overpressure.

What type of oil and viscosity ranges can this pump accommodate?

The pump handles standard mineral-based lubricating oils, synthetic polyalphaolefin (PAO) gear lubes, heavy fuel oils, and hydraulic fluids. Its permissible operational viscosity ranges between 12 and 20,000 mm²/s (cSt), with cold start tolerance up to 50,000 cSt at low operating speeds.