Vetter Flexible packers - Manual (Page 5)

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2.3 Warnings
Outside of the pipelines, Vetter Flexible packers are only to be in-
flated to a maximum of 0.5 bar for the safety inspection.
All controllers are fitted with safety valves that correspond to the
maximum permitted operating pressure of the packer.
If the maximum operating pressure of 2.5 bar is exceeded then
the safety valve will blow. The tolerance for opening and closing
of the safety valve must be maximum ± 10 %.
The set pressure is not allowed to be changed in any way.
Should the seal on the upper part of the valve be removed then
operation can no longer be guaranteed and the safety valve must
be exchanged. The permitted input pressure on the controller
(marked on the input coupling) must not be exceeded.
3. Preparations for operation
3.1 Inspection for completeness and safety
9 Inspection is made of the packer and the accessories.
9 The surface of the packer must not have any mechanical or
chemical damage: tears, forms of bubbles, show fabric lining.
9 The inflation coupling as well as the wheel sets must function
perfectly.
9 The controller and the connection hoses must not have any
signs of damage.
9 The packer is to be cleaned after each period of use. In doing
this no aggressively acting cleaning agents are to be used.
3.2 Selection of packer size
9 Each packer is designed for a certain diameter. This size is sti-
pulated on the packer label.
9 Before operation, measure and check the pipe diameter clea-
rance to see if it is in the packer range.
9 The Flexible packer must not be used outside the specified
range.
3.3 Only use Vetter accessories
9 Carefully check the controller as well as the inflation hoses to
see if they are clean because this is especially important for
perfect operation of the packer.
9 If there is any form of defect on the Flexible packer or its ac-
cessories then please contact the manufacturer.