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Pre-installation
cHecks
MiniMuM tank
A KB Type valve can be used in a tank that is at least 1.3m deep for KB40HF & KB50SF
dePtH:
and 1.0m for KB20, KB25, KB32, KB40SF.
raised valve
Use a KAX or KB Type valve for tanks with raised valve chambers.
cHaMbers:
do not use a k tyPe valve For tHese tanks.
oPerating sPace:
Check for sufficient clearance. The working dimensions are shown on the
attached drawings.
overFloW/Warning
Check the position of the overflow and warning pipe (where fitted).
PiPes:
See drawing on page 7.
turbulent
Exceptionally turbulent waters, such as in cooling towers, should be avoided directly
Water:
beneath the float. Calming measures such as baffle plates, still ponds etc. should be
used in these installations.
Flanged tanks:
The design of the valves, allows sufficient clearance between the float and most internal
tank flanges and ribs (dimension G shown on drawing on page 7). The valve backnuts may
be adjusted to enable fitting to tanks with large flanges; provided a minimum of 20mm
exists between the float and tank wall throughout the arc of the float.
round tanks:
Minimum tank diameters required.
sloPing tank
The wall to which the Aylesbury KB Valve is to be attached must be vertical. If the wall
Wall:
around the fixing hole is sloped, tapered washers must be used. These should be
available from the tank supplier.
PiPeWork
keraFlo
Aylesbury valves create virtually no tank wall stress. It is therefore not necessary
suPPort:
to provide additional support to the pipework as long as the Code of Practice for the
Support of Pipework in general is met.
isolating
An isolating valve must be fitted as near as is reasonably practicable to the
valve:
keraFlo
valve.
aylesbury kb valve
p3
valve
¾”
1”
1¼”
1½”sF
1½”HF
2”s F
Min tank
diaMeter (M)
0.5M
0.5M
0.6M
0.6M
0.8M
0.8M
