Vetter Flexible packers - Manual (Page 6)

Vetter Flexible Packer
Page 6/15
3.4 Use work protection clothing and other
protective devices
9 When working with packers, work protection clothing, hel-
met, safety glasses and gloves are to be worn.
9 Important! It is absolutely imperative that all regulations and
instructions with respect to entry into the channel shaft be
strictly adhered to.
3.5 Bringing the mechanism wheels into the
correct position
9 Incorrect positioning of the wheel set can cause problems and
unwanted delay when positioning the packer in the pipe. With
respect to hardening of the soaked fibre glass mat it is very
important that this procedure is quickly carried out otherwise
this will decrease the quality of the repair and this can even
lead to damage of the Flexible packer.
3.6 Protecting the packer against chemicals
9 Before covering the packer with the soaked glass fibre mat,
the Flexible packer is to be covered with a PE foil or some
form of protective covering (coating) which will help to avoid
a chemical reaction taking place between the rubber and the
resin. If a protective covering (coating) is selected then it is
recommended that the packer be inflated to 0.2 bar so that
the protective material is able to penetrate into all the pores
of the packer cladding.
9 Insufficient protection of the packer cladding can cause a che-
mical reaction and therefore damage to the Flexible packer.
This is the reason why no solvent agents, hydrocarbons and
any other aggressively acting agents are to be used as a pro-
tective covering.
3.7 Clean the pipe before operation
9 Mud, sand, stones and any sharp objects must be removed
before entering the packer into the sewer area. In most cases
it is necessary to use compressed water jets. It is recommen-
ded that the pipeline be inspected with a camera after clea-
ning has been made.