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.

p&t.qxp:d_new_spe_pt_gb 06/05/10 10:41 Page1

Self-closing P&T Relief Valves for Water Heaters. The combined 2 in 1 P&T relief valve provides the least expensive and provenmeans for protection against both excessive pressure and temperature emergen-cy conditions. Provides fully automatic pressure and temperature relief protection for hot waterstorage tanks and heaters.

Application:Fully automatic pressure and temperature relief protection for domestic hot watersupply tanks and heaters.

All recognized codes require that a temperature actuated relief valve be installed on a storage water heater,generally in such a manner that the temperature sensing element is in contact with hot water in the top 6inches (152mm) of the tank. A drain line must be fitted to each P&T valve. The drain line should discharge into a floor drain, check to see that a discharge line is connected to this valvedirecting the flow of hot water from the valve to a proper place of disposal otherwise personal injury may result.The drain pipe from the P&T must discharge through a tundish, to a safe and visible position to alert the house-holder of a fault condition with the system.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.The 684 P&T relief valves can be fitted vertically or horizontally, but not overturned.

Typical installation:Please refer to local Regulation.

PRESSURE AND TEMPERATURE RELIEF VALVES

Correct installations Incorrect installation

HOT WATERSTORAGEHEATER

HOT WATERSTORAGEHEATER

HOT WATERSTORAGEHEATER

Watts Art.Nr. Type Size Ø inlet - outlet ND Setting Weight68400 P&T relief valve M 1/2” - comp.15mm 1/2” 7 bar 190 gr.68401 P&T relief valve M 1/2” - comp.15mm 1/2” 10 bar 190 gr.68402 P&T relief valve Comp.15 mm - comp.15 mm 1/2” 7 bar 215 gr.68403 P&T relief valve M/F 1/2” 1/2” 7 bar 217 gr.68404 P&T relief valve M/F 1/2” 1/2” 10 bar 217 gr.68450 P&T relief valve M/F 3/4” 3/4” 3 bar 192 gr.68451 P&T relief valve M/F 3/4” 3/4” 4 bar 192 gr.68452 P&T relief valve M/F 3/4” 3/4” 6 bar 192 gr.68453 P&T relief valve M/F 3/4” 3/4” 7 bar 192 gr.68454 P&T relief valve M/F 3/4” - 9” probe 3/4” 7 bar 215 gr.68455 P&T relief valve M/F 3/4” 3/4” 10 bar 192 gr.68456 P&T relief valve M 3/4” - comp. 15 mm 3/4” 7 bar 202 gr.68457 P&T relief valve M 3/4” - comp. 15 mm 3/4” 10 bar 202 gr.68458 P&T relief valve M 3/4” - comp. 22 mm 3/4” 7 bar 230 gr.68459 P&T relief valve M 3/4” - comp. 22 mm 3/4” 10 bar 230 gr.

Range PN10

Features:These P&T valves feature a unique probe with special thermo-bonded coating. Thermostat is accurate and pro-ven. Exclusively designed and manufactured by WATTS INDUSTRIES.Temperature nominal setting : 92°C, the valve opens between 89°C and 95°C.The European Standard EN 1490: 2000, entitled “Building valves - Combined pressure and temperature reliefvalves – Tests and requirements”, describes the constructional and performance specifications that P&T reliefvalves must have.The WATTS INDUSTRIES series 684 P&T relief valves are certified to comply with the requirements of thisEuropean Standard EN 1490 (for settings 4 – 7 – 10 bar).

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Dimensions (mm)

68400-68401

881

33Ø 53

M1/2"

15 mm comp.

68

68403

881

33Ø 46

M 1/2"

F 1/2"

58

68402

188

33Ø 35

.pmoc mm 51

.pmoc mm 51

94

68450-68451-68452-68453-68455

881

33Ø 48

M 3/4"

F 3/4"

58

68454

292

33Ø 48

M 3/4"

F 3/4"

58

68456-68457

188

33Ø 44

"4/3 M

.pmoc mm51

85

68458-68459

881

33Ø 47

M 3/4"

22mm comp.

58

PRESSURE AND TEMPERATURE RELIEF VALVES

p&t.qxp:d_new_spe_pt_gb 06/05/10 10:41 Page3

Self Closing P&T Relief Valves for Water Heaters.The combined 2 in 1 P&T relief valves provides the least expensive and proven means for protection against both excessive pressure and temperature emergency conditions.Provides fully automatic pressure and temperature relief protection for hot water storage tanks and heaters.

Application: Fully automatic pressure and temperature relief protection for domestic hot water supply tanks and heaters.

Typical installation:Please refer to local Regulation and ensure installation is by a suitable qualified person.All recognised codes require that a temperature actuated relief valve be installed on a storage water heater, generally in such a manner that the temperature sensing element is in contact with hot water in the top 6 inches (152mm) of the tank.A drain line must be fitted to each P&T valve and discharge into a floor drain. It is important that the drain line should discharge into a floor drain, check to see that a discharge line is connected to this valve directing the flow of hot water from the valve is to a proper place of disposal otherwise through a tundish in a safe and visible position to alert the householder 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 valve must be installed observing the direction of flow indicated by the arrow on the valve body and the 684 P&T relief valve can be fitted vertically or horizontally, but not inverted, see below.

Features:These P&T valves feature a unique special thermo-bonded coating. Thermostat is accurate and proven and are exclusively designed and manufactured by WATTS INDUSTRIES.Temperature nominal setting: 92ºC, the valve opens between 89ºC and 95ºC.The European Standard EN 1490: 2000, entitled “Building valves - Combined pressure and temperature relief valves - Tests and requirements”, describes the constructional and performance specifications that P&T relief valves must have.The WATTS INDUSTRIES series 684 P&T relief valves are certified to comply with the requirements of this European Standard EN 1490 (for settings 4 - 7 - 10 bar).Range PN10

PRESSURE AND TEMPERATURE RELIEF VALVES

Re-

order

no.

54(

2)-U

K-0

9/04

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.

WATTS INDUSTRIES France06, avenue Gustave Eiffel - B.P. 4033928006 CHARTRES Cedex (France)Tel. +33 (0)2 37 25 11 00 - Fax +33 (0)2 37 25 11 11E-mail info@wattsindustries.frSite www.wattsindustries.com

Technical specificationsPressure opening 3-4-6-7-10 barTemp. opening 92°CMedium Sanitary waterNominal pressure PN 10

Material specificationsBody DZR BrassSpring SteelControl knob PA6 GFDiaphragm EPDM

Approval:WRAS N°1003045

Discharge rating:- 1/2” and 3/4” Ø 15 : 10 kW- 3/4” Ø 22 : 25 kW

Installation example:

� The valve stem is not in brass asother valve of the market, but made ofPA6.6 fiberglass and reinforced highresistance polymer.This synthetic material presentsexceptional mechanical resistance,and it is largely used in water metersand valves.100% recyclable, PA6.6 is particularlyappreciated by leading-edge industriesfor its endurance, insulation, and totalabsence of corrosion. This ensurescorrect operations even with corrosiveatmosphere (ie close to the sea) orwith an outside installation as solarroof top and avoid any risk of bindingor locking.

� Robust and low complexity construc-tion providing superior reliability andlongevity.

� Dezincification resistant brass hou-sing.

� The control knob made of PA6GF, ins-tead of a lever type valve, is moreaesthetic and with a modern design tocomplement the finish of today’s sys-tems.

� The pressure relief function is reliableand guaranteed by both a EuropeanISO9001 production and a wealth ofexperience gained in its different worldmarkets.

� The diaphragm is in EPDM and sani-tary approved. This piece is cast solid, the brassinsert is vulcanized with the rubberdiaphragm, providing a better reliabili-ty and no risk of escape.

� The probe is hung by a innovatingattachment unit.

� The probe is accurate and proven.Exclusively designed and manufactu-red by WATTS INDUSTRIES.

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The valve stem is not manufactured in brass like other valves on the market, but made of PA6.6 fiberglass reinforced high resistance polymer. This synethic material presents exceptional mechanical resistance, and it is largely used in water meters and valves. 100% recyclable, PA6.6 is particularly appreciated by leading-edge industries for its endurance, insulation, and total absence of corrosion. This ensures correct operations even with corrosive atmosphere (ie close to the sea) or with an outside installation as solar roof top and avoids any risk of binding or locking.

Robust and low complexity construction providing superior reliability and longevity.

Dezincification resistant brass housing.

The control knob made of PA6GF, instead of a lever type valve, is more aesthetic and with a modern design to complement the finish of today’s systems.

The pressure relief function is reliable and guaranteed by both a European ISO9001 production and a wealth of experience gained in its different world markets.

The diaphragm is made of EPDM and sanitary approved. This piece of cast solid, the brass insert is vulcanised with a rubber diaphragm, providing a better reliability and no risk to escape.

The probe is hung by an innovative attachment unit.

The probe is accurate and proven. Exclusively designed and manufactured by WATTS INDUSTRIES.

WATTS Industries UK LtdGrosvenor Business ParkEvesham, Worcestershire, WR11 1GA, EnglandPhone +44(0) 1386 446997 - Fax +44 (0)1386 41923E-mail sales@wattsindustries.co.ukwww.wattsindustries.com