Pressure and Temperature
Relief Valves - 684
• Fully automatic pressure and temperature relief protection.
• Product certification in accordance with European Standard EN 1490
(for settings 4 - 7 - 10 bar).
• WRAS approved.
• Accurate and proven probe, exclusively designed and manufactured by
WATTS INDUSTRIES.
PRESSURE AND TEMPERATURE RELIEF VALVES
PRESSURE AND TEMPERATURE RELIEF VALVES
Dimensions (mm)
68400-68401
68402
Ø 33
Ø 33
53
46
85
86
Application:
Application:
Fully automatic
automatic pressure
pressure and
and temperature
Fully
temperature relief
relief protection
protection for
fordomestic
domestichot
hotwater
water
supplytanks
tanks and
and heaters.
heaters.
supply
68403
Ø 33
53
94
15 mm comp.
F 1/2"
1 5 m m co m p .
188
188
M1/2"
188
Self-closing
Heaters.
Self ClosingP&T
P&TRelief
Relief Valves
Valves for Water Heaters.
Thecombined
combined22inin11P&T
P&Trelief
reliefvalve
valves
provides
least
expensive
proven
The
provides
thethe
least
expensive
andand
proven
meansfor
for protection
protection against both excessive
means
excessive pressure
pressureand
andtemperature
temperatureemergency
emergenconditions.
cy
conditions.
Provides fully
fullyautomatic
automaticpressure
pressureand
andtemperature
temperaturerelief
reliefprotection
protectionfor
forhot
hotwater
water
Provides
storagetanks
tanks and
and heaters.
heaters.
storage
Typical
Typical installation:
installation:
refer to
to local
local Regulation
Regulation.and ensure installation is by a suitable qualified person.
Please refer
M 1/2"
1 5 m m c om p.
All
codes require
requirethat
thataatemperature
temperatureactuated
actuated
relief
valve
installed
a storage
water
heater,
All recognized
recognised codes
relief
valve
be be
installed
on aon
storage
water
heater,
generally
in such a manner
that
the temperature
sensing element
is in
contactiswith
hot water
in hot
the water
top 6 in
inches
(152mm)
of
generally
in such a
manner
that the temperature
sensing
element
in contact
with
the top
6
the tank.(152mm) of the tank.
inches
A
line must
must be
befitted
fittedtotoeach
eachP&T
P&Tvalve
valve.
A drain
drain line
and discharge into a floor drain. It is important that the drain line should
The
drain line
intotoasee
floorthat
drain,
check to line
see is
that
a discharge
linevalve
is connected
this
valve
discharge
into should
a floor discharge
drain, check
a discharge
connected
to this
directing to
the
flow
of hot
directing
the
flow
of hot
from
the valve
to a proper
place
of disposal
otherwise
personal
injury
may result.
water from
the
valve
is towater
a proper
place
of disposal
otherwise
through
a tundish
in a safe
and visible
position
to alert
The
drain pipe from
must discharge
through a tundish, to a safe and visible position to alert the housethe householder
of athe
faultP&T
condition
with the system.
holder
of
a
fault
condition
with
the
system.
The P&T relief valves must be installed by a qualified plumber in accordance with current regulations.
The P&T relief valves must be installed by qualified technical plumbers in accordance with current regulations.
The P&T relief valve must be installed observing the direction of flow indicated by the arrow on the valve body and
The P&T relief valve must be installed observing the direction of flow indicated by the arrow on the valve body.
the 684 P&T relief valve can be fitted vertically or horizontally, but not inverted, see below.
The 684 P&T relief valves can be fitted vertically or horizontally, but not overturned.
Ø 33
Watts Art.Nr.
68400
68401
68402
68403
68404
68450
68451
68452
68453
68454
68455
68456
68457
68458
68459
Type
P&T relief
P&T relief
P&T relief
P&T relief
P&T relief
P&T relief
P&T relief
P&T relief
P&T relief
P&T relief
P&T relief
P&T relief
P&T relief
P&T relief
P&T relief
valve
valve
valve
valve
valve
valve
valve
valve
valve
valve
valve
valve
valve
valve
valve
Size Ø inlet - outlet
M 1/2” - comp.15mm
M 1/2” - comp.15mm
Comp.15 mm - comp.15 mm
M/F 1/2”
M/F 1/2”
M/F 3/4”
M/F 3/4”
M/F 3/4”
M/F 3/4”
M/F 3/4” - 9” probe
M/F 3/4”
M 3/4” - comp. 15 mm
M 3/4” - comp. 15 mm
M 3/4” - comp. 22 mm
M 3/4” - comp. 22 mm
ND
1/2”
1/2”
1/2”
1/2”
1/2”
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
Setting
7 bar
10 bar
7 bar
7 bar
10 bar
3 bar
4 bar
6 bar
7 bar
7 bar
10 bar
7 bar
10 bar
7 bar
10 bar
Weight
190 gr.
190 gr.
215 gr.
217 gr.
217 gr.
192 gr.
192 gr.
192 gr.
192 gr.
215 gr.
192 gr.
202 gr.
202 gr.
230 gr.
230 gr.
68458-68459
Ø 33
47
22mm comp.
M 3/4"
292
M 3/4"
85
Features:
Features:
These P&T
P&T valves
valves feature
feature aa unique
unique probe
specialwith
thermo-bonded
coating. Thermostat
is accurateis and
proven
and
are
These
special thermo-bonded
coating. Thermostat
accurate
and
proexclusively
designed
and
manufactured
by
WATTS
INDUSTRIES.
ven. Exclusively designed and manufactured by WATTS INDUSTRIES.
Temperature nominal
opens
between
89ºC
and
95ºC.
Temperature
nominal setting:
setting 92ºC,
: 92°C,the
thevalve
valve
opens
between
89°C
and
95°C.
The European
European Standard
StandardEN
EN1490:
1490:2000,
2000,entitled
entitled“Building
“Buildingvalves
valves
- Combined
pressure
temperature
relief
- Combined
pressure
andand
temperature
relief
valves
valves
Tests
and requirements”,
describes
the constructional
and performance
specifications
relief
- Tests –and
requirements”,
describes
the constructional
and performance
specifications
that P&T that
reliefP&T
valves
must
have. must have.
valves
The
WATTS INDUSTRIES
INDUSTRIESseries
series684
684P&T
P&Trelief
relief
valves
certified
to comply
requirements
of European
this
The WATTS
valves
areare
certified
to comply
withwith
the the
requirements
of this
European
Standard
EN
1490
(for
settings
4
–
7
–
10
bar).
Standard EN 1490 (for settings 4 - 7 - 10 bar).
Range
Range PN10
PN10
M 3/4"
44
F 3/4"
1 5 m m co m p .
188
188
HOT WATER
STORAGE
HEATER
188
HOT WATER
STORAGE
HEATER
Ø 33
85
85
F 3/4"
HOT WATER
STORAGE
HEATER
48
Ø 33
48
85
Incorrect installation
68456-68457
68454
68450-68451-68452-68453-68455
Correct installations
M 3/4"
PRESSURE AND TEMPERATURE RELIEF VALVES
� The valve
valvestem
stemisisnot
notmanufactured
in brass as
controlknob
knobmade
madeofofPA6GF,
PA6GF, ins� The control
in
brass
like of
other
onbut
themade
market,
other
valve
the valves
market,
of
but
made
of PA6.6and
fiberglass
reinforced
PA6.6
fiberglass
reinforced
high
high
resistance
polymer.
resistance
polymer.
This synethic
syntheticmaterial
materialpresents
presents
exceptional
exceptional mechanical
mechanicalresistance,
resistance,
and itit is
is largely
largelyused
usedininwater
watermeters
meters
and valves.
valves.
100% recyclable,
recyclable,PA6.6
PA6.6isisparticularly
particularly
appreciated
appreciated by
by leading-edge
leading-edgeindustries
industries
for its
its endurance,
endurance,insulation,
insulation,and
andtotal
total
absence
absence of
of corrosion.
corrosion.This
Thisensures
ensures
correct
correct operations
operationseven
evenwith
withcorrosive
corrosive
atmosphere
atmosphere (ie
(ie close
closetotothe
thesea)
sea)oror
with an
an outside
outsideinstallation
installationas
assolar
solar
roof top
any risk of binding
top and
and avoids
avoid any
binding
or locking.
locking.
instead
a lever
typevalve,
valve,isismore
more
tead
of of
a lever
type
aesthetic and
aesthetic
andwith
withaamodern
moderndesign
design to
to complement
thefinish
finishofoftoday’s
today’ssyscomplement
the
systems.
tems.
� The pressure
pressurerelief
relieffunction
functionisisreliable
reliable
and guaranteed
guaranteedby
byboth
botha aEuropean
European
ISO9001 production
ISO9001
productionand
andaawealth
wealthofof
experience gained
world
experience
gainedininitsitsdifferent
different
world
markets.
markets.
of EPDM
and
� The diaphragm
diaphragmisismade
in EPDM
and sani-
sanitary
approved.
tary
approved.
insert
This piece
piece of
is cast
castsolid,
solid,the
thebrass
brass
is vulcanised
with a rubber
diaphragm,
insert
is vulcanized
with the
rubber
providing a better
reliability
and reliabilino risk
diaphragm,
providing
a better
to escape.
ty
and no risk of escape.
� Robust
Robust and
and low
lowcomplexity
complexity construc-
� The probe
probe isishung
hungby
byan
a innovative
innovating
construction
providing
reliability
tion providing
superiorsuperior
reliability
and
and
longevity.
longevity.
attachment unit.
attachment
unit.
probe isisaccurate
accurateand
andproven.
proven.
� The probe
� Dezincification
Dezincification resistant
resistantbrass
brass hou-
Exclusively designed
Exclusively
designedand
andmanufactured
manufactuby WATTS
INDUSTRIES.
red
by WATTS
INDUSTRIES.
housing.
sing.
Installation example:
Approval:
WRAS N°1003045
Discharge rating:
- 1/2” and 3/4” Ø 15 : 10 kW
- 3/4” Ø 22 : 25 kW
Technical specifications
Pressure opening
Temp. opening
Medium
Nominal pressure
3-4-6-7-10 bar
92°C
Sanitary water
PN 10
Material specifications
Body
Spring
Control knob
Diaphragm
DZR Brass
Steel
PA6 GF
EPDM
WATTS
Industries UK
Ltd
WATTS INDUSTRIES
France
Grosvenor
Park - B.P. 40339
06, avenueBusiness
Gustave Eiffel
Evesham,
Worcestershire,
WR11 1GA, England
28006 CHARTRES
Cedex (France)
Phone
+44(0)
1386
446997
Fax+33
+44(0)2
(0)1386
Tel. +33 (0)2 37 25 11 00 - -Fax
37 2541923
11 11
E-mail
sales@wattsindustries.co.uk
E-mail info@wattsindustries.fr
www.wattsindustries.com
Site www.wattsindustries.com
Re-order no. 54(2)-UK-09/04
The photographs, illustrations and descriptions contained in this brochure are given for information only.
Watts Industries reserves the right to change the technical specifications or the design of these products without prior notice.