KRACHT KF80RF2-D15 Gear Pump
Overview
The KRACHT KF80RF2-D15 is an external gear pump from KRACHT’s proven KF 4–80 transfer pump series, sized at nominal displacement 80 with a geometrical displacement of 80.5 cm³ per revolution. The RF2 designation indicates a DIN-flange mounting without outboard bearing and an FPM (Viton) rotary shaft lip-type seal, while the D15 suffix identifies the integral, directly controlled pressure relief valve factory-set within the 0–15 bar adjustment range, protecting the pump and downstream system from damaging pressure spikes without requiring a separate in-line relief valve.
As the official authorized partner and exclusive regional representative for KRACHT, Seven Star LLC proudly supplies genuine KRACHT KF80RF2-D15 gear pumps and spare parts to customers across Oman and the wider GCC. Every pump is sourced through KRACHT’s authorized distribution channel, ensuring authentic German manufacturing quality, full technical documentation, and dependable after-sales support for engineering contractors and plant operators working on lubrication, fuel transfer, and hydraulic supply systems in Muscat, Sohar, and Salalah.
Operating Principle
The KRACHT KF80RF2-D15 operates on the positive-displacement gear pump principle, using two precisely meshed helical gears rotating within a close-tolerance housing. As the gears rotate, fluid is drawn into the expanding volume on the suction side, trapped in the spaces between adjacent gear teeth and the housing wall, then carried around the periphery and expelled at the discharge port as the teeth re-mesh. The helical tooth geometry used across the KF series reduces pressure pulsation and noise compared to straight-cut spur gears, giving smoother discharge flow across the pump’s rated speed range of 200 to 3,000 rev/min.
Because displacement per revolution is fixed by the gear geometry, discharge flow is directly proportional to shaft speed – at 1450 rev/min the KF80 delivers approximately 73 to 113 litres per minute depending on operating pressure and fluid viscosity. The integral D15 pressure relief valve continuously monitors outlet pressure and opens to bypass flow internally whenever system pressure would otherwise exceed the 0–15 bar factory setting, protecting seals, couplings, and downstream piping from transient overpressure during startup, valve closure, or blocked-line conditions without operator intervention.
Engineering Design of the KRACHT KF80RF2-D15
The KRACHT KF80RF2-D15 housing is manufactured from grey cast iron, with gear units machined from high-strength case-hardening steel, hardened and running in special multi-compound plain bearing bushes rated for radial loads up to 1,500 N at 1500 rev/min. The drive shaft is sealed by an FPM (Viton) rotary shaft lip-type seal suited to fluid temperatures from −10°C to 150°C, and the pump mounts via a DIN ISO 3019 flange with an ISO R775 short cylindrical drive shaft end, compatible with standard flange-mounted electric motors or engine-driven power take-offs.
Pipe connections on the KF80 size use SAE flange ports rather than the Whitworth threaded ports used on smaller KF4–25 pumps, simplifying installation into larger-bore lubrication and transfer piping runs. The pump weighs approximately 9.4 kg without the relief valve fitted and 11.2 kg with the integral D15 valve installed, and is rated for a maximum sustained operating pressure of 25 bar (40 bar peak), with permissible fluid viscosities from 12 to 20,000 mm²/s, covering everything from light hydraulic oils to heavy waste oils and bitumen-adjacent process fluids.
Key Features
The KRACHT KF80RF2-D15 combines robust cast-iron construction with an integral safety valve, giving specifiers a compact, low-maintenance pump for demanding fluid transfer duty. Key features include:
- Geometrical displacement of 80.5 cm³/rev delivers up to 113 litres per minute discharge flow at rated speed and low pressure.
- Integral D15 pressure relief valve, adjustable 0–15 bar, protects the pump and system without a separate in-line safety valve.
- Helical gear tooth geometry reduces noise and pressure pulsation compared to straight spur-gear designs.
- FPM (Viton) rotary shaft lip-type seal supports continuous fluid temperatures up to 150°C.
- Grey cast iron housing with case-hardened steel gear units ensures long service life under continuous duty.
- DIN ISO 3019 flange mounting and ISO R775 shaft end simplify integration with standard drive motors.
- Rated for fluid viscosities from 12 to 20,000 mm²/s, suitable for everything from light oils to heavy waste oils.
- Maximum continuous operating pressure of 25 bar with a speed range of 200 to 3,000 rev/min covers most industrial transfer and lubrication duties.
Industrial Applications
The KRACHT KF80RF2-D15 is widely specified for lubricating oil supply systems, waste oil transfer and disposal, fuel oil handling, hydraulic power units, and gear lubrication circuits in wind turbine gearboxes and marine propulsion gears. Its compact size, integral pressure protection, and tolerance for viscous or moderately contaminated fluids make it a standard choice for machine-building, filling station, and industrial hydraulics applications where reliable, low-noise fluid transfer is required around the clock.
As the officially authorized partner for KRACHT, Seven Star LLC distributes genuine KF80RF2-D15 gear pumps to industrial plants, marine engineering firms, and oil and gas contractors across Oman and the GCC, supporting lubrication and hydraulic supply systems in the Sohar and Salalah industrial and free zones, Muscat-based process facilities, and offshore and onshore oil and gas installations where dependable pump performance and genuine spare parts availability are essential.
Technical Specifications
The table below summarizes the principal technical specifications of the KRACHT KF80RF2-D15 external gear pump, confirming why the KRACHT KF80RF2-D15 is a preferred choice for lubrication and transfer duty across Oman.
| Parameter | Specification |
|---|---|
| Model | KRACHT KF80RF2-D15 |
| Pump Type | External gear pump, helical tooth system |
| Nominal Size | 80 |
| Geometrical Displacement | 80.5 cm³/rev |
| Discharge Flow (1450 rpm) | Approximately 73–113 l/min (pressure dependent) |
| Maximum Operating Pressure | 25 bar continuous, 40 bar peak |
| Pressure Relief Valve | Integral D-valve, adjustable 0–15 bar |
| Speed Range | 200–3,000 rev/min |
| Shaft Seal | FPM (Viton) rotary shaft lip-type seal |
| Fluid Temperature Range | −10°C to 150°C |
| Viscosity Range | 12–20,000 mm²/s |
| Mounting | DIN ISO 3019 flange, ISO R775 shaft end |
| Housing Material | Grey cast iron, case-hardened steel gears |
| Weight | Approximately 11.2 kg (with relief valve) |
Call To Action
As the authorized partner for KRACHT in Oman and the GCC, Seven Star LLC supplies genuine KRACHT KF80RF2-D15 gear pumps with full technical documentation, regional warehouse stock, and datasheet support. Contact our instrumentation and hydraulics division today to submit a formal RFQ, request engineering assistance for pump selection, or arrange technical consultation for your lubrication or fluid transfer project.
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