NON RETURN & FLAP VALVES

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NON RETURN

& FLAP VALVES

MISSION

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FLAP VALVES

The principle applications for flap valves are for surface water drainage associated with river, estuary and sea water outfalls to prevent backflow into the sewer and for final effluent outfalls from wastewater treatment works to prevent flood damage within the works.

NON-RETURN VALVES

Non return valves or backwater valves are used within sewerage and drainage systems to eliminate the risk of flood damage by the backflow of sewage or flood water into properties through low level entries such as low level drain gullies, toilets and washing machine outlets. The Environment Agency in their publication on damage limitation for properties at risk from flooding and the Government guidance note “Preparing for Floods” both recommend the installation of non-return valves (anti-flooding devices) on all such drains and sewers.

The Building Regulations 2000, Approved Document H, recommends the installation of non-return valves on drains from basements in low risk areas and on all drains in areas with a high risk of flooding or sewer surcharge.

These valves are also used in commercial and industrial application where non-pressure flow control is required (e.g. fish farming)

MATERIALS

FLAP VALVES

Body & flap - Glass reinforced plastic using a isophtalic polyester resin with surface isophtalic gel coat

Hinge - Self lubricating Ertacetal plastic

Seal - Ethylene Propylene Diene Monomer (EPDM) to BS EN 681-1

Optional nitrile (NBR) seal available

Fittings - Grade 1.4401 (316) austenitic stainless Steel to BS EN 10088-2

NON-RETURN VALVES

REDI (DN100 to 600)

Body & Flap - PVCu

Norham (DN250 to 500)

Body & flap - Glass reinforced plastic using a isophtalic polyester

resin with surface isophtalic gel coat Hinge - Self lubricating Ertacetal plastic

Optional nitrile (NBR) seal available

Fittings - Grade 1.4401 (316) austenitic stainless steel to BS EN 10088-2

MISSION T h e O r i g i n a l a n d B e s t - R u b b e r F l e x i b l e C o u p l i n g s a n d B u s h e s

INTRODUCTION

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D 110 110 160 160 200 250 315 L1 61 61 74 74 86 102 115 L2 61 61 74 74 100 130 165 L 307 307 337 337 451 520 620 H 230 230 255 255 300 374 445 REFERENCE 1555551 1555651 1551691 1551791 1552091 1552591 1553091 Nominal Size DN100R DN100 DN150 DN150R DN200 DN250 DN300

R = Stainless Steel Flap D = Outside Diameter Spigot

L1 L2 D H D L DN200 L L2 L1 D H D DN250-600

REDI

DN100

to DN600

A range of PVCu non return valves complying with the requirements of BS EN 13564 - ‘Anti-flooding devices for buildings’. Sizes DN100 to DN200 are certified by the German Institute LGA.

These valves are watertight to a pressure of 0.5 bar (5m Head).

These valves have a spigot and socket with integral seal as standard for direct connection to solid walled PVCu pipe but double spigot versions are available to special order for sizes DN400 and above. They can be

connected to other pipe material using Mission Rubber Flexible couplings (see separate technical brochure).

NON – RETURN VALVES

DN250 - 300

Single Flap with Locking Lever

D 400 500 630 L1 145 420 L2 240 330 -L 790 1400 1700 H 490 780 1100 Nominal Size DN500 DN400 DN600

Single Flap without Locking Lever

DN400 - 600

DN100 - 200

L1 L2 D H D L DN100-150 REFERENCE 1554091 T555191 T556391

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B

A

Norham

DN250

to DN500

A range of grp non-return valves designed for connection to any pipe material using Mission Rubber Standard Couplings and Bushes.

ADVANTAGES

• Resistant to 1bar (10m head) back pressure • Low weight for ease of installation yet with high

mechanical strength

• Resistant to all normal sewage effluents operating at normal temperatures (below 80 C) and not containing harmful industrial effluents. • Seals at a low level of back pressure

• Easily connected to any type of pipe material • Low maintenance

NON – RETURN VALVES

DN 250 300 400 500 A 485 490 605 700 C 730 825 995 1245 D 260 320 410 515 E 60 35 35 55 B 455 470 590 710 14 23 26 43 MULTI250 Reference MULTI300 MULTI400 MULTI500 Wgt(kg) C D E D B A C D E D

DN250

DN300 - 500

MISSION T h e O r i g i n a l a n d B e s t - R u b b e r F l e x i b l e C o u p l i n g s a n d B u s h e s

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A range of grp flap valves designed for ease of installation due to their low weight but with exceptional mechanical strength and durability.

ADVANTAGES

• Resistant to 1bar (10m head) back pressure (Multi-CD 0.8 bar)

• Most sizes can be handled by one person due to low weight

• Low weight ensures ease of installation • High mechanical strength

MULTI – N

DN200 to 600

A range of flap valves designed for direct

connection to any type of drain or sewer pipe using Mission Rubber Standard Couplings and Bushes

ADVANTAGES

• Eliminates need for concrete headwall or pipe flange for fixing e.g. can be connected to the spigot of an outfall pipe passing through gabions

• No drilling required • Fast and easy installation

A 224 284 334 420 528 659 B 216 280 332 417 522 655 C 205 218 269 291 316 352 D 202 263 318 405 506 638 E 11 12 15 16 17 18 F 345 399 480 570 678 808 Reference MULTI250N MULTI200N MULTI300N MULTI400N MULTI500N MULTI600N 1.2 1.9 3.0 5.5 9.0 13.5 Wgt(kg)

• High resistance to corrosion and ultraviolet degradation

• Seals at a low level of back pressure • Low operating head due to low weight • Low maintenance B F C A E ØD

FLAP VALVES

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MULTI – BD

DN100 to DN200

A range of small diameter flap valves with a PN 10 flange and an integral foamed EPDM rubber gasket for direct fixing to a flange or concrete headwall.

ADVANTAGES

• Lightweight for fast and easy installation • No need for cement grout when

fixing to a headwall A 212 252 285 372 C 57 57 57 65 B 220 250 285 340 D 110 125 160 200 E 55 66 66 75 F 185 230 260 315 0.5 0.75 1.0 1.5 Reference MULTI100BD MULTI125BD MULTI150BD MULTI200BD Wgt(kg)

MULTI – CD

DN250 to 600

A range of medium diameter flap valves with a PN 10 flange. Integral EPFM rubber sealing rings for sealing to concrete headwall.

ADVANTAGES

• Lightweight for fast and easy installation. • Resistant to 0.8bar (8m head) backpressure. • No need for cement grout when fixing to headwall. • Hinged design ensures full face sealing when closed.

DN 250 300 400 500 600 B 395 447 565 715 840 A 420 470 585 722 835 C 153 153 153 155 162 D 250 300 400 500 600 E 75 75 85 118 120 F 400 470 570 700 840 Wgt.(kg) 8 10 15 22 30 Reference MULTI250CD MULTI300CD MULTI400CD MULTI500CD MULTI600CD

FLAP VALVES

Wall mounting kits available

B F C A E ØD B F C A D E MISSION T h e O r i g i n a l a n d B e s t - R u b b e r F l e x i b l e C o u p l i n g s a n d B u s h e s

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MULTI – NB

DN200 to 1500

A range of medium diameter flap valves with an inclined flap and PN 10 flange. Integral EPFM rubber sealing rings for sealing to concrete headwall.

ADVANTAGES

• Lightweight for fast and easy installation.

• Inclined flap for additional security against backflow. • No need for cement grout when fixing to headwall. • Hinged design ensures flap closure when no discharge.

DN 200 250 300 400 500 600 700 800 1000 1200 1400 1500 A 343 395 448 570 676 788 1003 1125 1330 1525 1770 1860 B 343 395 448 570 676 788 935 1035 1264 1440 1640 1740 C 185 205 218 241 275 313 450 523 495 690 800 855 D 180 245 290 375 469 593 700 800 1013 1200 1400 1500 E 81 78 80 99 102 93 120 120 110 130 120 120 F 285 339 400 478 589 717 1030 1440 1400 1620 1840 1980 Wgt.(kg) 1.6 2.0 3.7 6.5 8.7 14.3 46.0 53.0 80.0 115 160 180 Reference MULTI200NB MULTI250NB MULTI300NB MULTI400NB MULTI500NB MULTI600NB MULTI700NB MULTI800NB MULTI1000NB MULTI1200NB MULTI1400NB MULTI1500NB

Wall mounting kits available

B F C A ØD E B C 25 F A _A E

DN200 - 600

DN1000

DN700,800,1200 - 1500

B F C A ØD E

FLAP VAVES

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NORHAM FLAP VALVE TECHNICAL DATA

For more information please contact us

Tel: +44(0)114 257 0040 • Fax: +44(0)114 257 1122 • Email: [email protected]

Mission Rubber (UK) Limited, Units 4+5, Atlas Business Park, Starnhill Close, Ecclesfield, Sheffield, S35 9TG

w w w. m i s s i o n r u b b e r. c o . u k

NOTE:

PCD = PITCH CIRCLE DIAMETER OF THE BOLT HOLES

Flanges drilled to BS EN 1092 PN10 pitch circle diameter as standard except those marked in red.

Standard bolt holes in the flanges are not drilled to BS EN 1092 diameters (see table) but can be supplied to special order.

PCD mm 180 210 240 295 350 400 515 620 725 HOLES Number 8 8 8 8 4 4 4 4 4 Diameter (mm) Ø16 Ø16 Ø22 Ø22 Ø10 Ø10 Ø10 Ø10 Ø10 Reference MULTI100BD MULTI125BD MULTI150BD MULTI200BD MULTI250CD MULTI300CD MULTI400CD MULTI500CD MULTI600CD 295 350 400 515 620 725 820 915 1160 1320 1515 1615 4 4 4 4 4 4 6 6 6 6 7 7 Ø10 Ø10 Ø10 Ø10 Ø10 Ø10 Ø10 Ø10 Ø21 Ø15 Ø15 Ø15 MULTI200NB MULTI250NB MULTI300NB MULTI400NB MULTI500NB MULTI600NB MULTI700NB MULTI800NB MULTI1000NB MULTI1200NB MULTI1400NB MULTI1500NB

TECHNICAL DATA

GENERAL

LOCATIONS

Flap valves should be fixed so as to avoid the accumulation of debris around the invert which could prevent the valve operating correctly.

TIDAL

LOCATIONS

Turbulaence of flow due to severe wave action will shorten the working life of a flap valve. Therefore it is recommended that careful consideration is given to the positioning of valves and they are installed within an outfall bay or otherwise protected from direct wave action by baffles.