The viscosity of fuel oil nr. 2 at 20 oC is about 150 SSU. The viscoity of fuel oil type 5 at 100 oC is about 4000 SSU. According the table above the speed of the reciprocating pump should be reduced with approximately 30%.
Speed Correction in Reciprocating Pumps vs. Water Temperatures
Typical rotary pumps are
In a gear pump the liquid is trapped by the opening between the gear teeth of two identical gears and the chasing of the pump on the suction side. On the pressure side the fluid is squeezed out when the teeth of the two gears are rotated against each other.
A lobe pump operates similar to a gear pump, but with two lobes driven by external timing gears. The lobes do not make contact.
A progressive cavity pump consist of a metal rotor rotating within an elastomer-lined or elastic stator. When the rotor turns progressive chambers from suction end to discharge end are formed between the rotor and stator, moving the fluid.
Speed Correction in Rotary Pumps vs. Viscosities
Piping systems and pumps - centrifugal pumps, displacement pumps - cavitation, viscosity, head and pressure, power consumption and more.
Securing a system and achieve equal wear by alternating pumps in parallel.
An introduction to Centrifugal Pumps.
Motor size vs. flow rate, shaft torque, shaft power and hydraulic power.
Calculate temperature rise vs. volume flow in pumps.
Calculate pumps hydraulic and shaft power.
Horsepower required to pump water.
Centrifugal pumps vs. positive displacement pumps.
An introduction to pumps and the Net Positive Suction Head (NPSH).
Adding head and flowrate for pumps arranged in parallel vs. serial.
The suction head of a water pump is affected by its operating altitude.
Suction Specific Speed can be used to determine stable and reliable operations for pumps with max efficiency without cavitation.
British Horse Power as used for pumps, fans and turbines - and how to convert to other units.
Rapidly closing or opening valves - or starting stopping pumps - may cause pressure transients in pipelines known as surge or water hammers.
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