14
7.3.
Handling
Handling only when parts are at ambiant temperature.
For valves with lifting lugs, please use only load rings provided
by KSB for handling the valve from the box to the pipe. Load rings must
be fully screwed (until it stops).
It is forbidden to handle the aggregate only by the actuator.
For valves with lifting lugs, it is necessary to take off the load
rings just after valve fitting, and to replace them by bonded seals and
screwed plugs provided by KSB, in order to avoid any entry of water
into the threaded holes of the valve body.
Handling depends on valve size, actuator size, actuator position
compared with the valve, and final valve/actuator position onto the
pipe, regarding the flipping operation. It may be carried out like not
exhaustive examples shown below.
Generally speaking, for bare shaft valves or valve/actuator aggregate,
handling must be carried out with minimum 3 slings as far as possible
from its gravity center to ensure a good stability. Handling requires
skilled and experienced staff (see §3)
Legend
Chain hoist
Sling
T1 (Wafer connection type)
T4 (Lug connection type)
Horizontal
Horizontal
Vertical
Vertical
One sling
on each
side
One sling
on each
side
BWSE (Butt--welded connection type)
Vertical
Horizontal
Horizontal
Vertical
T7 (Flanged connection type)
One sling
on each
side
7.4.
Recommendations for installation
The wafer, lug and flanged valves have to be inserted lightly between
flanges with flange gaskets.
Before assembly
-- Verify that the disc and the seat are free of solid particles like chips,
packing material, etc...
-- Verify that pipeline flanges are located on the same centreline and
are parallel
-- Verify that dimensions of gaskets flange are compatible with the
dimensions mentionned in the table 7.2.3.
-- Verify that nothing hinders the complete moving of the disc during
opening or closing, in particular at the internal weld seams or at the
pipe ends.
-- Pull apart the pipeline flanges to allow valve and gaskets insertion.
During assembly
-- Place the disc in closed position.
-- Position the valve above the pipe and place gasket in contact of
each flat face (you can fix them wit a spot of glue)
-- Insert valve and gaskets between pipe flanges and center using
several tie--rods.
-- Screw up progressively the nuts until metal complete tightness is
achieved between the valve body, the pipeline flanges and gaskets.
Note: Respect maximum torque (See paragraph 7.2.4).
-- Operate the valve several times to ensure that there is no valve disc
obstruction.
-- During transport, the valve may have been subjected to important
temperature differences or the vibrations making it necessary to
retighten the packing. Before performing this operation, please read
the maintenance manual.
