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Hydraulic Ram Pump Apparatus (SMT-FM-10)
Uses water hammer effect to pump water
Fixed overflow tank is used as a water source,
e.g. river, pool
Elevated tank with variable pump head
Waste valve with adjustable lift, closes cyclically
due to flow force of the water
Tank with check valve and air volume is used as
an air vessel
Air volume in the air vessel is varied by vent
Flow rate determined by SMT-FM-100 base
Water supply using SMT-FM-100 base module.
This ESOLS Product of Fluid Mechanics related labs used to study the Hydraulic Ram which
describes the Water hammer effect. If flowing water is suddenly brought to rest in a long
pipe, a phenomenon known as water hammer occurs, wherein a pressure wave travels along
the pipe. This principle is used in the hydraulic ram to pump water.
In this apparatus the water is fed to the ram via a long pipe at a gradient. Above a certain
water velocity, the waste valve in the ram closes automatically, due to the flow forces. This
happens suddenly, so that the kinetic energy of the water in the pipe is converted into
potential pressure energy. The pressure opens a check valve and the water flows into an air
vessel. The air cushion in the air vessel dampens the water hammer and ensures a uniform
lift into the elevated tank. After the water hammer has subsided, the waste valve opens due
to the dead weight, the water in the pipe starts to flow again and the process repeats itself.
The operation of the waste valve as a function of the weight load, the valve lift and the flow
rate are studied. Furthermore, it is possible to shown how the volume of air in the air vessel
affects the lift. Valves are used to adjust the flow rate. Transparent tank, a visible check valve
in the air vessel and the visible movement of the waste valve all permit excellent observation
of the function. All components are clearly mounted on a front plate.
This unit can be operated by Laboratory supply of with any Hydraulic Bench.