Swedenborg BK2:16GG Hydraulic Gear Pump

Swedenborg BK2:16GG Hydraulic Gear Pump (Group 2, Bi-Rotational / Side Ported)

The Swedenborg BK2:16GG is a fixed-displacement external gear pump engineered for demanding continuous-duty applications across marine auxiliary systems, deck machinery, and industrial hydraulic power units (HPUs). Featuring a rigid, extruded high-tensile aluminum-alloy housing coupled with cast-iron front mounting flanges and rear cover plates, the BK2:16GG delivers structural stiffness under high cyclic pressure loads.

The pump incorporates precision-machined, 12-tooth hardened steel integrated gear shafts that minimize flow pulsation and operational acoustic emissions. Hydrostatically balanced floating bronze thrust plates provide automatic axial clearance compensation across varying fluid temperatures and operating pressures, maintaining volumetric efficiency above 92% throughout extended service intervals.

Model Details

• Manufacturer / Brand: Swedenborg
• Model Series: BK2 (Standard European Group 2 Profile)
• Full Model Code: BK2:16GG
• Manufacturer Part Number (MPN): SW-BK2-16-GG-B01
• Displacement: 16.2 cc/rev (0.988 cu.in/rev)
• Condition: New unused surplus

Technical Details

Key Features

1. High-Purity Extruded Alloy Body: Built with cold-drawn aluminum alloy to withstand high shock pressures up to 250 bar without dimensional deformation or housing fatigue.
2. Dual Hydrostatic Pressure Compensation: Floating side-plate thrust blocks automatically compensate for internal thermal expansion, preserving axial clearance and maximizing volumetric output under heavy load.
3. Low-Pulsation 12-Tooth Gear Train: Optimized gear profile reduces fluid turbulence, downstream line vibration, and mechanical noise under high-torque operation.
4. Reinforced Dual FKM Shaft Sealing: Viton compound construction withstands shaft speeds up to 3000 RPM, marine atmospheric corrosion, and high thermal stress without hardening or leaking.
5. Interchangeable Flange & Port Geometry: Built to ISO/DIN European Group 2 dimensional envelopes for straightforward retrofits into marine auxiliary skids and commercial plant manifolds.

OEM & Interchange Part Number Cross-References

• Bosch Rexroth: 0510625313 / AZPF-11-016RRR12MB
• Casappa (Polaris Series): PLP20.16D0-82E2-L GD/GD-N-EL / PLP20-16
• Marzocchi: GHP2-D-16 / 1P-D-16
• Roquet: 1L16DE10R
• Salami: 2PE16D-P31P1

Marine Applications

• Vessel Steering Gear Actuation: Delivers continuous, reliable pilot and main-loop fluid displacement for twin-ram and rotary vane marine rudders.
• Anchor Windlass & Mooring Winches: Operates as main supply or pilot loop driver on foredeck and aft mooring control stations.
• Marine Crane Slewing Loops: Provides smooth proportional flow control to slewing gear drives and boom luffing cylinders.
• Hydraulic Bow Thruster Pitch Control: Powers hydraulic pitch adjustment manifolds on controllable pitch propellers (CPP).
• Watertight Bulkhead Doors: Supplies high-pressure hydraulic fluid to emergency closing accumulators and hydraulic actuators.

Frequently Asked Questions

Can the rotation direction of the Swedenborg BK2:16GG be changed in the field?

Yes. The BK2:16GG is bi-directional by design, but comes factory-configured for single-direction operation (standard clockwise/right-hand rotation). To reverse rotation, remove the rear cover and front flange, invert the gear assembly positions relative to the suction/pressure ports, and flip the hydrostatic balance seal plates according to the instructions in the IOM manual. Always replace the housing seals when performing a field rotation change.

What grade of hydraulic oil should be used with this pump?

The unit operates best with premium mineral-based anti-wear hydraulic fluids matching ISO VG 32, VG 46, or VG 68 designations (DIN 51524 Part 2 HLP standards). For vessels operating in arctic or varying seasonal waters, use high-viscosity index (HVLP) oils to maintain uniform operating pressures.

Why is the pump body made of aluminum while the flange is cast iron?

This dual-material construction combines weight savings and rapid heat dissipation through the extruded aluminum body with the high mechanical rigidity and vibration damping of a cast-iron mounting face. The cast-iron flange resists mechanical deflection and bolt-hole elongation under fluctuating marine engine room vibration.

How do I troubleshoot sudden loss of pressure or abnormal whining noises?

A high-pitched mechanical whine usually signals cavitation or aerated fluid. First, inspect the suction line filter and suction pipe isolation valves for blockages or restrictions. Second, check the shaft seal and suction flange O-ring for air ingress. If aeration is eliminated but discharge pressure cannot reach 210 bar, the hydrostatic side plates may have sustained internal bypass grooving due to contaminated oil, necessitating a rebuild or unit replacement.