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MISSIONRUBBER UK
The Or i g i na l and Best - Rubber F l e x i b l e Coup l i ngs and Bushes
NON RETURN& FLAP VALVES
MISSIONRUBBER UK
FLAP VALVESThe 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 VALVESNon 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 VALVESBody & flap - Glass reinforced plastic using a isophtalic polyester resin with surface isophtalic gel coat Hinge - Self lubricating Ertacetal plasticSeal - Ethylene Propylene Diene Monomer (EPDM) to BS EN 681-1 Optional nitrile (NBR) seal availableFittings - Grade 1.4401 (316) austenitic stainless Steel to BS EN 10088-2
NON-RETURN VALVESREDI (DN100 to 600)
Body & Flap - PVCuSeal - Ethylene Propylene Diene Monomer (EPDM) to BS EN 681-1
Norham (DN250 to 500) Body & flap - Glass reinforced plastic using a isophtalic polyester resin with surface isophtalic gel coat Hinge - Self lubricating Ertacetal plasticSeal - Ethylene Propylene Diene Monomer (EPDM) to BS EN 681-1 Optional nitrile (NBR) seal availableFittings - Grade 1.4401 (316) austenitic stainless steel to BS EN 10088-2
MISSIONRUBBER UK
The Or i g i na l and Best - Rubber F l e x i b l e Coup l i ngs and Bushes
INTRODUCTION
2
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 FlapD = Outside Diameter Spigot
L1L2
DH
D
L
DN200
L
L2L1
D
HD
DN250-600
The Or i g i na l and Best - Rubber F l e x i b l e Coup l i ngs and Bushes
REDI
DN100 to DN600A 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 - 600DN100 - 200
L1L2
D
H
D
L
DN100-150
REFERENCE
1554091
T555191
T556391
MISSIONRUBBER UK
The Or i g i na l and Best - Rubber F l e x i b l e Coup l i ngs and Bushes
3
B
A
Norham
DN250 to DN500A range of grp non-return valves designed for connection to any pipe material using Mission RubberStandard 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
MISSIONRUBBER UK
The Or i g i na l and Best - Rubber F l e x i b l e Coup l i ngs and Bushes
4
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 NDN200 to 600A range of flap valves designed for directconnection 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
D
FLAP VALVES
MISSIONRUBBER UK
The Or i g i na l and Best - Rubber F l e x i b l e Coup l i ngs and Bushes
5
MULTI BD DN100 to DN200A 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 600A 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
Wall mounting kits available
BF
C
A
E
D
B
F
C
A DE
MISSIONRUBBER UK
The Or i g i na l and Best - Rubber F l e x i b l e Coup l i ngs and Bushes
6
MULTI NBDN200 to 1500A range of medium diameter flap valves with an inclined flap andPN 10 flange. Integral EPFM rubber sealing rings for sealing toconcrete 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