Verticals > Chemicals

Screw Pumps with Internal Bearings

Application

As fuel-oil supply-, ring lin and transfer pump. Lubricating oil supply and circulating pump, tank drain pump, cooling-oil and hydraulic pump. Generally applicable to self-lubricating liquids without any content of grinding particles.

Screw Pump with Internal Bearings

Design

  • Three spindle, self-priming screw pump for low noise and continuous flow. As overpressure protection a safety valve is provided. The pump can be delivered with heating device electric or steam

Connections

  • Suction and discharge on the same level (in-line).

Temperature

  • max. approx 150 °C (Please consider recommended inlet pressure for fuel pumps up to max. 150 °C)

Pump pressure

  • normal up to 16 bar, for medium with good self-lubricating property higher pressures up to 100 bar are available.

Capacity

  • 0,5 – 250 m3/h

Screw Pump with Internal Bearings

Shaft sealing

  • Radial sealing ring, stuffing box, mechanical seal

Materials

  • Casing: cast iron or spheroidal graphite iron

  • Spindles: nitride steel

Driver

  • electric motor, diesel engine, steam turbine, mechanically, electrically or hydraulically controlled variable speed drives, V-belt drive

Direction of rotation

  • CW, special design: CCW

Power transmission

  • flexible coupling or V-belt drive.

Screw Pump Internal Bearings

Vertical free-standing-design

Bearings of the pump

  • spindles are supported in replaceable bearing bushes or in bearing housings. A roller bearing on the drive end cover used for the axial fixing of spindle block. The axial thrust, which acts on the supply screws is hydraulically balanced.

Suction lift

  • max. 8 m vacuum metric depending on viscosity and speed

Viscosity

  • marine standard up to 760 cst

Screw Pump Internal Bearings

Horizontal design with base frame

Screw Pump Internal Bearings

Horizontal or vertical for bulkhead mounting