mail@graf.info
www.graf.info
17
/
36
6.
Assembling the tank dome and telescopic dome shaft
6.1
Assembling the tank dome
Prior to assembly, the enclosed seal is inserted into the tank
domes’s groove „B“. The tank dome is then aligned with the
piping connections and is locked to the tank neck. It is
essential to make sure that the upper seal "A" (pre-assembled)
is correctly installed.
6.2
Assembling the telescopic dome shaft
The telescopic dome shaft enables infinite adaptation of the tank
to given site surfaces with earth coverage of between 750 mm and
950 mm (Mini telescopic dome shaft) or 750 mm and 1050 mm
(Maxi telescopic dome shaft).
For assembly purposes, the enclosed profile seal (material EPDM)
is inserted into the tank dome's sealing groove and is coated
generously with soft soap (do not use mineral oil-based lubricants,
as these attack the seal). The telescope is then greased, inserted
and aligned with the surface of the site.
6.3
Telescopic dome shaft on which persons may walk
Important:
To prevent loads from being transferred onto the tank,
round-grain gravel
(max. grain size 8/16) is filled in in layers
around the telescope
and is evenly compacted. Damage to the
tank dome
and telescope must be avoided during this step. The
cover is then positioned and is sealed to prevent entry by children.
Tighten the threaded connection on the cover so tightly that it
cannot be opened by a child!
6.4
Telescopic dome shaft over which passenger cars may drive
If the tank is installed under areas used by passenger cars, the
collar area of the telescope
(colour anthracite) must be
supported with concrete
(load class B25 = 250 kg/m²). The
layer of concrete to be installed must be at least 300 mm wide and
approx. 200 mm high all around.
The minimum coverage above
the shoulder of the tank is at least 800 mm (max. 1050 mm with
telescope, coverage up to max. 2000 mm possible with
intermediate section).
Attention:
It is essential to use the cast telescopic dome shaft
(with class B cast cover).
„A“
„A“
„B“
„B“
