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Liquid Oxygen Pump:
The liquid oxygen
pump is a single stage, single acting piston pump. It is used for
filling Oxygen into cylinders upto a pressure of 165/200 kgs./cm2.
The pump is
designed for assembly in the Air Separation unit that works by pumping
liquid oxygen and gasifying the same in Heat Exchangers for final
filling as gas in cylinders. Control of liquid feed is unnecessary
because the pump is designed in accordance with the plant size and the
liquid produced is constantly pumped off.
The drive unit is similar to any reciprocating machine with the crankshaft, flywheel, connecting rod, cross head etc.
The liquid oxygen
pump consists of a stainless steel inside liner with liquid inlet and
evaporated gas outlet port. There are no valves on these ports, which
are closed by the piston itself on the pressure stroke. The third
outlet is the main discharge outlet with the two Non-Teturn Ball
Valves. The two ensure that these valves are fully closed, a positive
pressure of about 60kgs cm2 must be maintained on it. When a fresh
batch of cylinders is taken for filling, open the manifold valve slowly
or use a spare batch of cylinders to ensure a positive pressure on
these valves. Most malfunctions of the pump are due to these valves not
closing properly.
When the pump is
operated Liquid Oxygen from the main condenser enters the outlet jacket
of the pump. Some of this liquid evaporates due to heat produced in
pumping and the vapour is passed out through the upper port back into
the upper column as gas. The main stream of liquid oxygen is taken into
the pump cylinder and compressed out by the piston in the pressure
stroke. This high pressure liquid oxygen passes through two non-teturn
valves into the Heat Exchangers and then to the Cylinder Filling Rack.
Technical Data:
Type of Pump
|
KE 80
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KE 100
|
KE 200
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Number of cylinders
|
1
|
1
|
1
|
Cylinder diameter
|
2 mm
|
24 mm
|
30 mm
|
Piston Stroke
|
100 mm
|
100 mm
|
100 mm
|
Speed
|
125/150 RPM
|
125/150 RPM
|
125/150 RPM
|
Suction Pressure
|
0.5 kg/cm2
|
0.5 kg/cm2 |
0.5 kg/cm2 |
Discharge Pressure (Final Mix)
|
165 kg/cm2 |
165 kg/cm2 |
165 kg/cm2 |
Operating Temperature
|
-183oC
|
-183oC |
-183oC |
Normal delivery
|
60 to 100
|
90 to 120
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200 to 225
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Driving capacity required
|
3 HP
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5 HP
|
7.5 HP
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