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reciprocating pump vane pump screw pump centrifugal pump
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Reciprocating Centrifugal Rotary Gear
Lobe Screw Radial piston Volute
Centrifugal Gear Propeller Turbine
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Volute pump Diffuser pump Regenerative pump All of the above
Reciprocating pump Screw pump Diffuser pump Water-ring pump
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Hydraulic pumps Valves Hydraulic cylinders Hydraulic motors
Piston pump Screw pump Diffuser pump Water-ring pump
Hydraulic pumps Valve Hydraulic cylinders Hydraulic motors
Lubrication systems using engine driven lube oil pumps do not require any additionalindependent arrangement when such arrangements have been proven reliable The use of engine driven pre-lube pumps is permitted on vessels with propulsion systemsdeveloping less than 500 shaft horsepower When forced lubrication is used for propulsion engines, one independently drivenstand-by pumps is to be provided in addition to the necessary pumps for normal operation Lubrication systems where two oil coolers are fitted require a minimum of twotemperature control devices which may be actuated by similar sensors
They are particularly suited for pumping high viscosity fluids They are started with the discharge valve opened The flow of liquid is developed by imparting energy due to the rotation of an impeller They are always mounted in a horizontal position
The hydraulic pumps Valves Hydraulic cylinders Hydraulic motors
reciprocating pump vane pump mono pump axial-flow pump
hydraulic pumps valves hydraulic cylinders hydraulic motors
Variable volumes can be obtained with gear pumps only by variation of the pump drivespeed A radial piston pump houses sliding pistons in a stationary cylinder block throughwhich passes a rotating pintle or ported shaft The amount of fluid displaced per revolution of an axial piston rotary pump is dependenton the angle formed between the cylinder block and valve plate All of the above
The high discharge pressure of the rotary pumps permits a larger volume of fluid perunit time than the reciprocating pump Rotary pumps are capable of pumping more fluid than reciprocating pumps of the sameweight Rotary pumps occupy only one-half the space of reciprocating pumps Rotary pumps eliminate discharge slippage of the pumped liquid, while this does nothold true for a reciprocating pump
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