KERAFLO AYLESBURY KB, Installation Manual

Page: 7 / 8

notes:
Longer chain available on request.
Opposite hand valves available as cost option (chain on left).
SCHD2, SECT 7, G16.5 Water Regs. Gaps should be more if water is turbulent – especially if near valve discharge. 40mm
minimum for valves 1½“ (DN 40mm) or larger – recommended by keraFlo .
Typically twice inlet bore. SECT 7, SCHD 2G16.10 Water Regs. Warning/overflow pipes should be capable of taking any possible
flow in the pipe arising from inlet valve failure. See page 8 for side view.
tel 0118 921 9920 fax 0118 921 9921 info@keraflo.co.uk www.keraflo.co.uk
Warning
tHe float arM Must Be fItteD aBsolutelY
vertIcallY (In tHe oPen PosItIon) as InDIcateD
BY tHe sPIrIt level. (see Below)
MIsalIGnMent wIll Prevent tHe valve froM
closInG. ensure overflow level (B) Is not
lower tHan 200MM froM tHe centre lIne of
tHe valve.
tHe warnInG PIPe anD overflow outlet sHoulD
alwaYs Be aBove tHe HIGHest water level
acHIeveD Before tHe valve closes.
¾”(20)
1”(25) 1¼”(32)
1½”(40)sF 1½”(40)HF
2”(50)sF
sizes (dn):
aylesbury kb valve
p7
dn 20 25 32 40sF 40HF 50sF
size ¾” 1” 1¼” 1½”sF 1½”HF 2”sF
jMin 175 175 175 175 210 210
jMax
1800 1800 1800 1800 1670 1670
k 168 168 168 168 210 210
lMax 200 200 200 200 237 237
M
26o 26o 26o 26o 34o 34o
nMin 160 160 160 160 180 180
nMax
180 180 180 180 220 220
o
70 70 70 70 115 115
PMin 200 200 200 200 330 330
PMax
1825 1825 1825 1825 1815 1815
q 65 65 65 65 120 120
rMin 375 375 375 375 540 540
rMax
2000 2000 2000 2000 2000 2000
sMax 215 215 215 215 268 268
t
26° 26° 26° 26° 34° 34°
WMin
170 170 170 170 320 320
xMax 245 245 245 245 305 305
yMin
500 500 500 500 800 800
a
B
c
D
oPening level (lWl)
xMax
closing level (tWl)
P delayed
action
y Min
(tyPically
requires
additional
500MM
dePtH)
overFloW
B
c
D
sMax
q
oPen
Position
oPening
buoy
e
MiniMuM
oPening level
FroM bottoM
oF tHe tank
WMin
closing
Float
ø50
oPening
buoy
closing
Float
25MM
Min
Warning PiPe
o
lMax
B
closed
Position
k
n
j
a
M
sPirit level
WitH cHain
disconnected
bubble Must
be betWeen
black lines
r
a
t
P delayed
action