Product Overview
The KP1/16A10AXOA4NL1 is a high-pressure external gear pump from Germany’s KRACHT KP Series. KRACHT is a family-owned enterprise founded in 1911, headquartered in Werdohl, Germany, and a world-renowned specialist in fluid control. The KP Series high-pressure gear pumps are primarily used in oil-hydraulic systems and represent the core of KRACHT’s high-pressure gear pump product line.
This unit belongs to the KP1 Series with a displacement of 16 cm³/rev. The KP Series features hydraulic axial clearance compensation, with the ability to withstand high dynamic loads and insensitivity to pressure peaks and continuous vibrations. The pump housing is manufactured from high-strength die-cast aluminum (cast iron available upon request), with gears made from case-hardened steel, precision ground and honed to ensure the highest manufacturing quality.
KP Series Sub-Series Description:
KP0 Series: Displacement 1.4 – 8.0 cm³/rev, max speed 4000 rpm
KP1 Series: Displacement 2.0 – 22 cm³/rev, including 2/3/4/5.5/6.3/8/11/14/16/19/22 cm³/rev
KP2 Series: Displacement 20 – 62 cm³/rev, including 20/25/28/32/40/50/62 cm³/rev
KP3 Series: Displacement 63 – 125 cm³/rev, including 63/71/82/100/112/125 cm³/rev
KP5 Series: Displacement 160 – 300 cm³/rev
Key Interchangeability Advantage: Our 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 (covering rated pressure, peak pressure, and full speed range performance curves), guaranteeing plug-and-play reliability with zero performance deviation.
Model Code Breakdown (based on KRACHT KP Series designation rules):
KP = Series: High Pressure Gear Pump
1 = Sub-series: KP1 (displacement 2–22 cm³/rev)
16 = Displacement: 16 cm³/rev
A10A = Shaft type and flange configuration code
XOA = Seal and design configuration code
4NL1 = Specific design code
Technical Specifications
KP1/16A10AXOA4NL1
Product Series: KRACHT KP1 Series High-Pressure External Gear Pump
Brand: KRACHT (Germany)
Pump Type: External gear pump with hydraulic axial clearance compensation
Displacement: 16.0 cm³/rev
Maximum Operating Pressure: 300 bar
Maximum Speed: 4000 rpm
Minimum Speed: 700 rpm
Flow Rate Range: 2.4 – 31.6 L/min (KP1 Series)
Operating Temperature Range: -20°C to +150°C (seal-dependent)
Media Viscosity Range: 10 – 1800 mm²/s
Inlet Pressure: -0.4 to 2 bar
Housing Material: High-strength die-cast aluminum (cast iron available upon request)
Gear Material: Case-hardened steel
Gear Teeth: z = 13, specially shaped tooth profile
Bearing Type: Heavy-duty multi-component plain bearings (PTFE-lead coated bronze)
Seals: Single radial lip-type shaft seal
Mounting: Flange mounting
Direction of Rotation: Right-hand or left-hand
Mounting Position: Any
Recommended Fluids: Hydraulic oils, mineral oil-based media (DIN 51524/25), engine oils (DIN 51511)
Key Technical Advantages
1. Hydraulic Axial Clearance Compensation for High Efficiency Under Pressure
The KP Series features hydraulic axial clearance compensation, with pressure field sealing elements automatically compensating for axial clearance. This design effectively minimizes internal leakage, ensuring high volumetric efficiency (η_vol ≥ 95%) under high-load and high-pressure conditions. The pump withstands high dynamic loads, remaining insensitive to pressure peaks and continuous vibrations – ideal for the toughest operating conditions.
2. High Tooth Count (z=13) and Special Tooth Profile for Low Pulsation and Low Noise
The KP1 Series features a 13-tooth gear design combined with a specially shaped tooth profile, effectively reducing displacement fluctuation and pressure pulsation. This design significantly lowers pump operating noise, providing smoother operation and less noise for downstream hydraulic components. Gear flanks are ground and honed to precision, with journals superfinished to ensure the highest manufacturing quality.
3. High-Strength Materials and Heavy-Duty Composite Bearings for Long Service Life
The pump housing is manufactured from high-strength die-cast aluminum (cast iron available upon request). Gears are made from case-hardened steel. Bearings feature heavy-duty multi-component plain bearings with PTFE-lead coated bronze bushings, delivering excellent load capacity and wear resistance. All functional components are housed within a high-strength housing, providing rugged construction and impact resistance.
4. Modular Design for Flexible Configuration and Multi-Pump Combinations
The KP Series features a modular standard design with multiple configuration options:
Optional DBD-type integral relief valve for overload protection
Optional ATEX explosion-proof version for special applications
Optional outboard bearing to absorb radial and axial forces
Supports single, tandem, and multiple pump combinations (KP + KP or KP + KP + KP)
5. Wide Displacement Coverage and Broad Media Adaptability
The KP Series offers displacement coverage from 1.4 to 300 cm³/rev. Five sub-series (KP0 through KP5) cover everything from small to large flow requirements. Suitable for pumping various hydraulic oils, mineral oil-based media, and engine oils. Operating temperature range covers -20°C to +150°C with media viscosity adaptability up to 10 – 1800 mm²/s.
Application Areas
Mobile Hydraulic Systems: Construction and agricultural machinery hydraulic systems
Stationary Hydraulic Systems: Industrial hydraulic power units, presses, injection molding machines
Marine Industry: Gearbox lubrication, controllable pitch propeller (CPP) systems
Municipal and Special Vehicles: Sanitation vehicles, specialty utility vehicles
Wind Power: Wind turbine gearbox lubrication systems
Mining and Metallurgy: Mining equipment and metallurgical machinery hydraulic systems
Polyurethane and Chemical Industry: Chemical media transfer
Expert Maintenance Tips
1. Model Confirmation and Selection
The KP1/16A10AXOA4NL1 has a displacement of 16 cm³/rev, belonging to the KP1 sub-series (displacement 2–22 cm³/rev).
KP Series displacement ranges: KP0 (1.4–8 cm³/rev), KP1 (2–22), KP2 (20–62), KP3 (63–125), KP5 (160–300).
Verify system operating pressure, flow requirements, and rotation direction during selection. For left-hand rotation, select the corresponding L suffix model.
2. Pre-Installation Checks
KP Series pumps have a fixed rotation direction (right-hand or left-hand) – verify matches system drive direction before installation.
Confirm mounting flange type and drive shaft specifications (cylindrical with key, splined, or tapered shaft) precisely match system interface.
Never use hammer-driven installation – always use proper tools.
Inlet pressure must be maintained within -0.4 to 2 bar.
3. First Start-Up & Media Priming
Prime the pump housing with clean hydraulic oil before first start-up; ensure suction line is fully filled – never run dry.
Recommended fluid: mineral hydraulic oil or hydraulic oil per DIN 51524/25.
Maintain operating temperature within -20°C to +150°C (seal-dependent).
Speed range: 700 – 4000 rpm.
4. Filtration Requirements
5. Operating Monitoring
Maximum operating pressure must not exceed 300 bar.
The KP Series is known for low pulsation and low noise – 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, do not operate continuously in relief mode.
