KF16RF1/197-D15 KRACHT Gear Pump 16cc 25 bar 3000 rpm

Product Overview

The KF16RF1/197-D15, KF63LF1-D15, and KP0, KP1, KP2, KP3, KP5 series gear pumps originate from Germany’s KRACHT gear pump technology platform. KRACHT is a family-owned enterprise founded in 1911, headquartered in Werdohl, Germany, and is a world-renowned fluid control specialist.

The KF Series features helical transfer pumps with a modular standard design, suitable for pumping various liquids. In the standard version, housing parts are made of cast iron, with gears made from high-strength case-hardened steel, mounted in special multi-material plain bearing bushes. All sizes feature helical gearing, which, combined with a special gearing geometry, delivers extremely low noise levels and low-pressure pulsation.

The KP Series features high-pressure gear pumps with hydraulic axial clearance compensation, primarily used in oil-hydraulic systems. Their design withstands high dynamic loads, making them insensitive to pressure peaks and continuous vibrations.

Key Interchangeability Advantage: Our KF/KP series gear pumps are manufactured to strict German KRACHT original design specifications, ensuring 100% direct interchangeability with original units. All mounting interfaces, flange dimensions, 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 series designation rules):

• KF = Series: Helical Transfer Pump / KP = Series: High-Pressure Gear Pump

• 16 / 63 = Nominal displacement (cm³/rev)

• RF1 / LF1 = Mounting type and port configuration

• D15 = Integral relief valve (overload protection)

• KP0 / KP1 / KP2 / KP3 / KP5 = High-pressure gear pump series and size codes

Technical Specifications 

KF Series – General Specifications

• Product Series: KF Series Helical Transfer Pump

• Brand: KRACHT (Germany)

• Pump Type: Helical External Gear Pump

• Displacement Range: 2.5 – 3150 cm³/rev

• Maximum Operating Pressure: 25 bar

• Operating Speed: 200 – 3000 rpm

• Media Viscosity Range: 12 – 20000 mm²/s

• Media Temperature Range: -40°C to +200°C

• Ambient Temperature Range: -20°C to +60°C

• Housing Material: EN-GJL-250 (GG 25) / EN-GJS-400-15 (GGG 40)

• Gear Material: Steel 1.7139 (case-hardened steel)

• Bearing Type: DU multi-layer plain bearings

• Seals: NBR / FKM / PTFE / EPDM

• Mounting: Flange mounting (DIN ISO 3019)

• Port Connections: KF 4…25: Whitworth pipe thread / KF 32…80: SAE flange

• Direction of Rotation: Right-hand or left-hand

KF16RF1/197-D15

• Nominal Displacement: 16 cm³/rev

• Actual Displacement: Approx. 16.09 cm³/rev

• Maximum Operating Pressure: 25 bar

• Maximum Speed: 3000 rpm

• Noise Level: ≤ 67 dB(A) 

• Housing Material: Cast iron

• Seals: NBR

• Direction of Rotation: Right-hand or left-hand

KF63LF1-D15

• Nominal Displacement: 63 cm³/rev

• Displacement Range: 32 – 80 cm³/rev

• Maximum Operating Pressure: 25 bar

• Maximum Speed: 3000 rpm

• Speed Range: 200 – 3000 rpm

• Direction of Rotation: Left-hand or right-hand

• Mounting: Horizontal mounting

• Housing Material: Grey cast iron or ductile iron

• Gear Material: High-strength case-hardened steel

• Bearing Type: Special composite plain bearings

KP Series – General Specifications

• Product Series: KP Series High-Pressure Gear Pump

• Brand: KRACHT (Germany)

• Pump Type: External gear pump with hydraulic axial clearance compensation

• Displacement Range: 1.4 – 300 cm³/rev

• Maximum Operating Pressure: 300 bar

• Media Temperature Range: -20°C to +150°C

• Recommended Fluids: Hydraulic oils, mineral oil-based media (DIN 51524/25), engine oils (DIN 51511)

KP0 Series

• Displacement Options: 1.0 – 8.0 cm³/rev (KP0/1 – KP0/8)

• Maximum Operating Pressure: 280 bar

• Maximum Speed: 4000 rpm

• Housing Material: Aluminum

KP1 Series

• Displacement Options: 1.5 – 22 cm³/rev

• Maximum Operating Pressure: Up to 280 bar

KP2 Series

• Displacement Options: 20 – 62 cm³/rev

• Maximum Operating Pressure: Up to 400 bar

• Maximum Speed: 3000 rpm

KP3 Series

• Displacement Options: 58 – 125 cm³/rev

• Maximum Operating Pressure: 300 bar

KP5 Series

• Displacement Options: 160 – 300 cm³/rev

• Maximum Operating Pressure: 315 bar

Key Technical Advantages

1. Helical Gear Design for Ultra-Low Noise and Low Pulsation

The KF Series features helical gearing combined with a special gearing geometry, delivering extremely low noise levels and low-pressure pulsation. The KF16RF1/197-D15 achieves noise levels as low as ≤ 67 dB(A) . This characteristic makes it particularly suitable for industrial environments with strict noise requirements.

2. 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 or EN-GJS-400-15 (GGG 40) ductile iron. Gears are made from 1.7139 high-strength case-hardened steel. Combined with DU multi-layer composite plain bearings, the design delivers excellent wear resistance, rugged construction, and impact resistance.

3. Hydraulic Axial Clearance Compensation for High Efficiency Under Pressure

The KP Series features hydraulic axial clearance compensation, effectively minimizing internal leakage and maintaining high volumetric efficiency under high-pressure conditions. The design withstands high dynamic loads, making it insensitive to pressure peaks and continuous vibrations – ideal for the most stringent operating conditions.

4. Modular Design for Flexible Configuration and Expansion

The KF Series features a modular standard design, with displacement, flange, shaft end, rotation direction, and seal materials all customizable. Optional D15 integral relief valve provides overload protection; optional ATEX explosion-proof version adapts to special applications; optional outboard bearing absorbs radial forces.

5. Wide Displacement Coverage and Broad Media Adaptability

The KF Series offers displacement coverage from 2.5 to 3150 cm³/rev. Suitable for pumping various liquids, including high-viscosity oils, chemicals, and low-lubricity media. Operating temperature range covers -40°C to +200°C with media viscosity adaptability up to 12 – 20000 mm²/s.

Application Areas

KF Series (Transfer Pumps)

• Equipment Forced Lubrication: Lubricating oil supply for marine gearboxes, wind turbines, and compressors

• Diesel Engines: Pre-lubrication and main lubrication

• Filtration Systems: Oil transfer and circulation

• Fuel Delivery: Fuel supply systems

• Petrochemical Industry: Transfer of various viscosity oils and chemicals

• Food Industry: Edible oil, beverage, and other liquid transfer

• Power Generation and Metallurgy: Fluid transfer for lubrication and cooling systems

• Paper Industry: Pulp and coating transfer

KP Series (High-Pressure Pumps)

• Mobile and Stationary Hydraulic Systems

• Construction and Agricultural Machinery

• Municipal and Special Vehicles

• Industrial Hydraulic Systems

• Polyurethane and Chemical Industry

Expert Maintenance Tips

1. Model Confirmation and Selection

• The KF Series is for low-pressure transfer (25 bar); the KP Series is for high-pressure applications (up to 300 bar+) – verify system operating pressure requirements during selection.

• KP Series displacement ranges: KP0 (1–8 cm³/rev), KP1 (1.5–22), KP2 (20–62), KP3 (58–125), KP5 (160–300).

• The D15 suffix indicates an integral relief valve – this valve is for overload protection only and must not be operated in continuous relief mode.

2. Pre-Installation Checks

• KF/KP Series pumps have a fixed rotation direction (right-hand or left-hand) – verify matches system drive direction before installation.

• Confirm mounting flange type (DIN ISO 3019 flange mounting).

• Confirm port connection specifications (KF 4…25: Whitworth pipe thread / KF 32…80: SAE flange).

• 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.

• Operating speed must be maintained within 200 – 3000 rpm.

• Maintain media temperature within -40°C to +200°C.

• All internal components are automatically lubricated by the pumped media during operation – no additional lubrication required.

4. Filtration Requirements

• Ensure media contains no solid particles to prevent gear and bearing wear.

• Regularly monitor fluid cleanliness to prevent contaminants from accelerating gear and plain bearing wear.

5. Operating Monitoring

• The KF Series is known for low noise and low pulsation – if abnormal noise or pressure fluctuation occurs, first check suction lines for leakage or blockage.

• Regularly check torque on pump and piping connection bolts to prevent loosening from vibration.

• For models with integral relief valves (D15), do not operate continuously in relief mode.