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The LPG cylinders must be emptied before
proceeding with repair or test phases. It is therefore obligatory
to have a cylinder emptying system before starting valve
unscrewing operations.
The emptying system is made up of two
components:
A rack holds the cylinders
This rack has been designed to hold the LPG cylinders “head down”
(valves pointing downwards) to carry out the emptying of the LPG
liquid phase. Depending on the sizes of the cylinders, the racks
will be fixed or tilting types.
LPG Transfer
We propose two systems for transferring the LPG contained in the
cylinder back to the storage:
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Pneumatic pump:
This pneumatic piston pump is made up of three coaxial
cylinders. Two are devoted to drawing up and pushing back the
liquid LPG and the third ensures the pneumatic motorisation of
the pump. This pump is directly installed between the emptying
rack and the LPG return line.
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Compressor:
The emptying rack is connected to two intermediary storage
reservoirs. Through two motorised 4-ways valves and one gas
compressor the LPG transfer is carried out starting with the
intermediary reservoirs and going on to the LPG return line.
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