Product Overview
The KF6/500H10BP0A7DP1/197 is a helical transfer pump from Germany’s KRACHT KF Series. KRACHT is a family-owned enterprise founded in 1911, headquartered in Werdohl, Germany, and a world-renowned specialist in fluid control. The KF Series is KRACHT’s classic medium-low pressure transfer pump product line, renowned for its helical gearing, low pulsation, low noise, and modular design.
This unit belongs to the KF6 Series (KF 4/125…KF 6/730 series) with a displacement of 500 cm³/rev. The KF Series features helical external gear pump construction with a modular standard design. In the standard version, housing parts are made of cast iron, with gears made from high-strength case-hardened steel, hardened and mounted in special multi-material plain bearing bushes.
The Type 197 design is specifically engineered for applications with air-entrained media, used for lubricating oil pumping in marine gearbox systems. The special construction eliminates additional noise caused by air mixed in the oil. Pressure pulsation at the pump outlet can be controlled within 1%.
Key Interchangeability Advantage: Our KF series gear pumps are manufactured to strict German KRACHT original design specifications, ensuring 100% direct interchangeability with original units. All mounting interfaces (flange type per DIN ISO 3019), shaft configurations, and port positions are identical to the original product – no modifications required. Every pump undergoes 100% factory performance testing under simulated operating conditions, guaranteeing plug-and-play reliability with zero performance deviation.
Model Code Breakdown (based on KRACHT KF Series designation rules):
KF = Series: Helical Transfer Pump
6 = Size code (KF6 Series, displacement 125–730 cm³/rev)
500 = Nominal displacement: 500 cm³/rev
H10B = Mounting/shaft configuration code
P0A = Seal and design configuration code
7DP1 = Specific design code
197 = Design type: Special optimization for air-entrained media
Technical Specifications
KF6/500H10BP0A7DP1/197
Product Series: KRACHT KF Series Helical Transfer Pump
Brand: KRACHT (Germany)
Pump Type: Helical External Gear Pump
Nominal Displacement: 500 cm³/rev
KF6 Series Displacement Range: 125 / 150 / 180 / 200 / 250 / 315 / 400 / 500 / 630 / 730 cm³/rev
Maximum Continuous Operating Pressure: 25 bar
Peak Pressure: 40 bar (instantaneous)
Maximum Speed: 3000 rpm
Minimum Speed: 200 rpm
Media Temperature Range: -40°C to +200°C
Ambient Temperature Range: -20°C to +60°C
Media Viscosity Range: 12 – 15,000 mm²/s
Housing Material: Grey cast iron EN-GJL-250 (GG 25)
Gear Material: 16 Mn Cr 5 case-hardened steel
Bearing Type: DU multi-compound plain bearings (P10, DP4)
Seals: EPDM / CR / HNBR / FKM / FEP (multiple options)
Seal Types: Rotary shaft lip seal / Double rotary shaft lip seal (hardened) / Mechanical seal
Mounting: Flange type (DIN ISO 3019)
Direction of Rotation: Clockwise or counter-clockwise optional
Mounting Position: Any (except pumps with shuttle valve)
Key Technical Advantages
1. Helical Gear Design for Ultra-Low Noise and Low Pulsation
All KF Series sizes feature helical gearing, which, combined with a special gearing geometry, delivers extremely low noise levels and low-pressure pulsation. Pressure pulsation at the pump outlet can be controlled within 1%. This characteristic makes it particularly suitable for lubrication systems with strict noise and flow stability requirements.
2. Type 197 Special Design for Air-Entrained Media
The Type 197 design is specifically developed for applications with air-entrained media, used for lubricating oil pumping in marine gearbox systems. The special construction eliminates additional noise caused by air mixed in the oil. This unique design provides an irreplaceable advantage in air-entrained media applications such as marine lubrication.
3. High-Strength Materials and Composite Plain Bearings for Long Service Life
KF Series housings are manufactured from EN-GJL-250 (GG 25) grey cast iron, with gears made from 16 Mn Cr 5 high-strength case-hardened steel. Combined with DU multi-compound plain bearings, the design delivers excellent wear resistance, rugged construction, and impact resistance.
4. Wide Media and Temperature Adaptability
The KF Series is suitable for pumping various liquids, compatible with mineral hydraulic oils, synthetic oils, lubricating oils, fuel oils, thermal oils, and other self-lubricating media. Operating temperature range covers -40°C to +200°C with broad viscosity adaptability (12 – 15,000 mm²/s). Multiple sealing options (rotary shaft lip seal, double lip seal, mechanical seal) are available to meet diverse media requirements.
5. Modular Design for Flexible Configuration
The KF Series features a modular standard design, with displacement, flange, shaft end, rotation direction, and seal materials all customizable. Optional relief valve for pump and system safety protection. Optional ATEX explosion-proof version and outboard bearing for absorbing radial loads on the input shaft side.
Application Areas
Marine Gearbox Lubrication: Type 197 specifically designed for lubricating oil pumping in marine gearbox systems, particularly for air-entrained media applications
Wind Power: Wind turbine gearbox lubrication systems
Compressor Lubrication: Compressor lubricating oil supply
Diesel Engines: Pre-lubrication and main lubrication
Filter Systems: Oil delivery and circulation
Fuel Delivery: Fuel supply systems
General Mechanical Engineering: Lubrication and cooling systems for various industrial equipment
Waste Oil Treatment: Waste oil treatment, transport, and preparation
Generator Manufacturing: Generator lubrication and cooling systems
Gearbox Manufacturing: Gearbox lubrication systems
Expert Maintenance Tips
1. Model Confirmation and Selection
The KF6/500H10BP0A7DP1/197 has a displacement of 500 cm³/rev, belonging to the KF6 Series (KF 4/125…KF 6/730).
Type 197 is specifically designed for air-entrained media applications, used for lubricating oil pumping in marine gearbox systems.
Verify system operating pressure (≤ 25 bar), flow requirements, and media characteristics during selection.
2. Pre-Installation Checks
KF Series pumps have a fixed rotation direction (clockwise or counter-clockwise) – verify matches system drive direction before installation.
Confirm mounting flange type is flange type (DIN ISO 3019).
Confirm port connection specifications precisely match system interface.
Never use hammer-driven installation – always use proper tools.
3. First Start-Up & Media Priming
Prime the pump housing with clean media before first start-up; ensure suction line is fully filled – never run dry.
Maintain operating temperature within -40°C to +200°C.
Speed range: 200 – 3000 rpm.
4. Seal Selection
Select appropriate seals based on media characteristics: EPDM, CR, HNBR, FKM, FEP and other materials available.
Optional rotary shaft lip seal, double rotary shaft lip seal (hardened), or mechanical seal.
5. Operating Monitoring
Continuous operating pressure must not exceed 25 bar.
Type 197 is known for low noise – if abnormal noise occurs, first check air content in the media and suction line sealing.
Regularly check torque on pump and piping connection bolts to prevent loosening from vibration.
