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p6
aylesbury kb valve
alignMent Warning!
tHe actuator arM Must Be fItteD wItH tHe
Brass enD tIlteD Down wHen In tHe closeD
PosItIon anD ensure tHe BuBBle In tHe sPIrIt
level Is Between tHe lInes. tHIs Is crItIcal to
tHe oPeratIon of tHe valve.
18
Adjust the length of the chain from
the buoy to the hanger to match the
following:
chain length = y - 190mm
(20,25,32 & 40sF)
chain length = y - 250mm
(40HF & 50HF)
Do not cut the chain, loop
any excess chain on to the hanger.
19
Unhook the Float Adjusting Peg and
move the float along the chain so the
distance from the Hanger to the Float
Peg is as follows:
x - 163mm
20
The highest closing water level (JMIN
page 7) can be achieved by having no
spare chain links between the hanger
and the float adjusting peg. The lowest
closing water level (JMAX page 7) can be
achieved by having the float touching the
top of the opening buoy whilst using all of
the available chain (last link on hanger).
21
Applications where the top water level
(TWL) can rise after the valve has closed
will cause the chain to become slack.
A cable tie/ratchet strap should be fitted
over the float adjusting peg in such a
way as to prevent the chain from slipping
off. Ensure the chain cannot become
entangled with tank tie bars etc.
it May be easier to adjust tHe cHain lengtH
beFore installation.
22
delayed action (level diFFerential)
The delayed action is the distance the
water level will drop from before the
valve opens i.e. the difference between
opening and closing water levels. This is
adjustable between PMIN (Float touching
top of Opening Buoy) and PMAX (Float
Adjusting Peg almost touching Hanger
whilst using all of the available chain)
see page 7.
testing
Before leaving the installation, manually
move the valves to test their operation a
number of times, ensuring that they move
freely from the open to the closed position
and from the closed to the open position.
Where a valve has not been in operation for
one month it is also recommended that the
above procedure is carried out.
diagraM 6
sPirit
level
