Steimel SF2-8KRD Gear Pump

Steimel SF2-8KRD Gear Pump

The Steimel SF2-8KRD Gear Pump is a precision engineered, high-performance positive displacement external gear pump for demanding industrial and marine applications. The SF series from Gebr. Steimel GmbH is known worldwide for its absolute reliability in handling low- to high-viscosity lubricating media. The SF2-8KRD features a strong grey cast iron housing, pinion shafts of hardened case-hardened steel with helical teeth, built-in pressure relief valve (D), radial shaft sealing (R), and special FKM (Viton) elastomers, which are suitable for constant operation under high thermal and mechanical loads.

Experts chose this pump for maritime engineering outfits. It delivers a pulsation-free flow of fluid. It is essential for shipboard main engine pre-lubrication, auxiliary gear lubrication systems, fuel booster units and hydraulic oil circulation.

Model Details

• Manufacturer: Gebr. Steimel GmbH & Co. KG
• Series: SF Series (Compact External Gear Pump)
• Model Designation: SF2-8KRD
• Manufacturer Part Number (MPN): SF2-8KRD

Key Features

1. Pulsation-Free Delivery: Precision helical-cut profile-ground gearing guarantees smooth, uniform fluid transfer critical for sensitive lubrication systems.
2. Integrated Pressure Relief Valve: Built-in adjustable bypass valve protects the system from overpressure spikes and short-term circuit blockage.
3. Bi-Directional Rotation: Reversible operational rotation achieved simply by rotating the end cover plate by 180 degrees.
4. Heavy-Duty Bearing Support (KR Design): Features dedicated ball bearings to effectively absorb external radial and axial drive forces.
5. Compact & Robust Build: Space-saving footprint designed for direct close-coupling or bracket mounting in confined engine room spaces.

Applications

• Main engine and auxiliary diesel engine pre-lubrication units
• Marine gearboxes and turbocharger lube oil supply systems
• Fuel oil booster and transfer modules
• Industrial hydraulic and cooling lubricant circulation circuits
• Process engineering for viscous, non-aggressive chemical fluids

Compatibility

• Compatible Prime Movers: Standard IEC frame electric motors (B3/B5/B14 configurations via VDMA lanterns)
• Compatible Fluids: Mineral oils, synthetic lubricating oils, heavy/diesel fuel oils, hydraulic oils, and cooling lubricants possessing minimum inherent lubricity.
• Cross-Reference Series: Steimel SF 2/8 Series, SF2-8RD, SF2-8-VLFM variants.

Marine Engineer Expert’s Guide

• Viscosity Monitoring During Cold Starts: When utilizing the SF2-8KRD for heavy lube oils in cold engine room environments, ensure the fluid viscosity stays within operational limits before ramping up motor speeds to prevent cavitation or high-torque shaft shear.
• Relief Valve Setting Adjustment: The internal pressure relief valve is factory-set for baseline safety. If recalibrating for specific system requirements, verify the set-point pressure using an inline pressure gauge to avoid continuous bypass heating of the oil.
• Rotation Direction Alignment: Remember that altering the flow direction on site is easily done by loosening casing bolts and rotating the pump end cover precisely 180 degrees. Always verify alignment marks prior to re-commissioning.

Frequently Asked Questions

What is the primary function of the Steimel SF2-8KRD gear pump?

The Steimel SF2-8KRD is designed for the continuous, low-pulsation transfer and pressurization of lubricating oils and non-aggressive industrial liquids without solid particulates.

Can the direction of rotation be reversed on this pump?

Yes. The direction of rotation (and consequently the delivery flow) can be reversed easily, even retroactively, by turning the pump housing end cover by 180 degrees.

What type of shaft sealing does the SF2-8KRD use?

This particular model utilizes a robust radial shaft sealing ring packed with FKM (Viton) elastomers, making it highly resistant to high-temperature synthetic and mineral lubricating oils.

Is an integrated pressure relief valve standard on this unit?

Yes, the ‘D’ designation in the part spec indicates an integrated, adjustable pressure relief valve built directly into the housing body to protect against brief line blockages or overpressure.