NON RETURN & FLAP VALVES

Transcription

1 RUR UK NON RTURN & P VVS RUR UK The Original and est - Rubber lexible ouplings and ushes

2 INTROUTION P VVS 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-RTURN VVS 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 nvironment gency in their publication on damage limitation for properties at risk from flooding and the Government guidance note Preparing for loods both recommend the installation of non-return valves (anti-flooding devices) on all such drains and sewers. The uilding Regulations 2000, pproved ocument, 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) MTRIS P VVS ody & flap - Glass reinforced plastic using a isophtalic polyester resin with surface isophtalic gel coat inge - Self lubricating rtacetal plastic Seal - thylene Propylene iene Monomer (PM) to S N 1-1 Optional nitrile (NR) seal available ittings - Grade 1.01 (31) austenitic stainless Steel to S N NON-RTURN VVS RI (N100 to 00) ody & lap - PVu Seal - thylene Propylene iene Monomer (PM) to S N 1-1 Norham (N to ) ody & flap - Glass reinforced plastic using a isophtalic polyester resin with surface isophtalic gel coat inge - Self lubricating rtacetal plastic Seal - thylene Propylene iene Monomer (PM) to S N 1-1 Optional nitrile (NR) seal available ittings - Grade 1.01 (31) austenitic stainless steel to S N RUR UK The Original and est - Rubber lexible ouplings and ushes

3 NON RTURN VVS RI N100 to N00 range of PVu non return valves complying with the requirements of S N nti-flooding devices for buildings. Sizes N100 to N200 are certified by the German Institute G. These valves are watertight to a pressure of 0.5 bar (5m ead). These valves have a spigot and socket with integral seal as standard for direct connection to solid walled PVu pipe but double spigot versions are available to special order for sizes N00 and above. They can be connected to other pipe material using Mission Rubber lexible couplings (see separate technical brochure). N N - N00-00 Single lap with ocking ever N Nominal Size N RRN N100R N150 N150R N200 N N200 N Single lap without ocking ever 1 2 Nominal Size 1 2 RRN N00 N T N-00 N00 30 R = Stainless Steel lap = Outside iameter Spigot T RUR UK The Original and est - - Rubber lexible ouplings and and ushes 3

4 NON RTURN VVS Norham N to N range of grp non-return valves designed for connection to any pipe material using Mission Rubber Standard ouplings and ushes. VNTGS Resistant to 1bar (10m head) back pressure ow weight for ease of installation yet with high mechanical strength Resistant to all normal sewage effluents operating at normal temperatures (below 0 ) and not containing harmful industrial effluents. Seals at a low level of back pressure asily connected to any type of pipe material ow maintenance N N - N Wgt(kg) MUTI MUTI MUTI MUTI RUR UK The Original and est - Rubber lexible ouplings and ushes

5 P VVS range of grp flap valves designed for ease of installation due to their low weight but with exceptional mechanical strength and durability. VNTGS Resistant to 1bar (10m head) back pressure (Multi- 0. bar) Most sizes can be handled by one person due to low weight ow weight ensures ease of installation igh mechanical strength igh resistance to corrosion and ultraviolet degradation Seals at a low level of back pressure ow operating head due to low weight ow maintenance MUTI N N200 to 00 range of flap valves designed for direct connection to any type of drain or sewer pipe using Mission Rubber Standard ouplings and ushes VNTGS liminates 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 ast and easy installation Wgt(kg) MUTI200N MUTIN MUTIN MUTI00N MUTIN MUTI00N Ø RUR UK The Original and est - Rubber lexible ouplings and ushes 5

6 P VVS MUTI N100 to N200 range of small diameter flap valves with a PN 10 flange and an integral foamed PM rubber gasket for direct fixing to a flange or concrete headwall. VNTGS Wgt(kg) ightweight for fast and easy installation No need for cement grout when fixing to a headwall MUTI100 MUTI125 MUTI MUTI Wall mounting kits available Ø MUTI N to 00 range of medium diameter flap valves with a PN 10 flange. Integral PM rubber sealing rings for sealing to concrete headwall. VNTGS ightweight for fast and easy installation. Resistant to 0.bar (m head) backpressure. No need for cement grout when fixing to headwall. inged design ensures full face sealing when closed. N Wgt.(kg) MUTI MUTI MUTI MUTI MUTI Wall mounting kits available RUR UK The Original and est - Rubber lexible ouplings and ushes

7 P VVS MUTI N N200 to 1 range of medium diameter flap valves with an inclined flap and PN 10 flange. Integral PM rubber sealing rings for sealing to concrete headwall. N VNTGS ightweight for fast and easy installation. Inclined flap for additional security against backflow. No need for cement grout when fixing to headwall. inged design ensures flap closure when no discharge. Ø N Wgt.(kg) MUTI200N MUTIN N700,00,0-1 MUTIN MUTI00N MUTIN Ø MUTI00N MUTI700N MUTI00N MUTI1000N MUTI0N MUTI100N N1000 MUTI1N Wall mounting kits available 25 RUR UK The Original and est - Rubber lexible ouplings and ushes 7

8 TNI T NORM P VV TNI T P OS mm Number iameter (mm) MUTI Ø1 MUTI Ø1 MUTI Ø22 MUTI Ø22 MUTI 350 MUTI 00 MUTI MUTI 20 MUTI MUTI200N 295 MUTIN 350 MUTIN 00 MUTI00N 515 MUTIN 20 MUTI00N 725 MUTI700N 20 MUTI00N 915 MUTI1000N 110 Ø21 MUTI0N 1320 Ø15 MUTI100N Ø15 MUTI1N Ø15 NOT: P = PIT IR IMTR O T OT OS langes drilled to S N 1092 PN10 pitch circle diameter as standard except those marked in red. Standard bolt holes in the flanges are not drilled to S N 1092 diameters (see table) but can be supplied to special order. GNR OTIONS lap valves should be fixed so as to avoid the accumulation of debris around the invert which could prevent the valve operating correctly. TI OTIONS 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. or more information please contact us Tel: +(0) ax: +(0) mail: [email protected] Mission Rubber (UK) imited, Units +5, tlas usiness Park, Starnhill lose, cclesfield, Sheffield, S35 9TG