Repair Couplings

Band-Seal

Band-Seal is a range of versatile, flexible couplings used for joint pipes of both similar and different materials and sizes. The couplings are especially suitable for drains, sewers and underground pipelines. The extensive range connects pipes from 24mm to over 2000mm nominal size (DN), to other pipes of the same or different sizes and materials.

The Band-Seal range of couplings consists of moulded synthetic elastomeric sleeves and stainless steel clamping bands. Standard Couplings also include a stainless steel shear band. A wide range of Bushes, Tools and End Caps complete the range.

Band-Seal Couplings are manufactured to exacting standards and are used and specified extensively by Water Companies and Local Authorities throughout the UK as well as being distributed worldwide.

Specification

Couplings


British Standard (BS EN295)
Band-Seal Couplings and Bushes up to 1000mm diameter comply with the requirements of BS EN295-4 “Vitrified clay pipes and fittings and pipe joints for drainage and sewers – Requirements for special fittings, adaptors and compatible accessories”.

British Board of Agreement (BBA)
When Band-Seal couplings up to 600mm internal diameter are used to connect any combination of vitrified clay, cast iron, ductile iron, concrete and PVC-u popes, they are approved by BBA Certified No. 90.2494.

WIS 4-41-01
Assessed under the British Standard Certification Scheme, Standard Couplings and Bushes from 100mm to 600mm internal diameter, comply with the requirements of Water Industry Specification WIS 4- 41-01 ‘Specification for flexible couplings for gravity sewerage and drainage pipes’. Licence Number 33388.

Danish Standard
VA Approval Number:
VA2.23/19354

German Standard
MPA Approval Number
220000307-01

Approved Quality System
BS EN ISO 9001 (BS5750)
Band-Seal Couplings are manufactured under an Approved Quality System which complies with BS EN ISO 9001 (BS5750) and certified by Registered Firm of Assessed Capability Certificate No FM1420.

Materials

Elastomers
The elastomeric components of the couplings and bushes are made of one or two types of synthetic rubber, either Ethylene Propylene Diene Monomer (EPDM) or Styrene Butadiene Rubber (SBR). These elastomers offer excellent resistance to normal drainage and sewerage effluents as well as providing excellent long term performance and hence are commonly used to joint pipes. For situations where effluents contain hydrocarbons, fats, greases etc then components are available made in nitrile rubber.

Both EPDM and SBR conform to the requirements of BS EN 681-1:1996 “Specifications for elastomeric joint rings for pipework and pipelines – drainage” as well as to ISO 4633:1986.

Stainless Steel
Couplings are available in two grades of austenitic stainless steel to suit either normal ground conditions or conditions when additional corrosion resistance is required such as coastal environments with high levels of chlorides in the soil or groundwater.

For normal conditions Naylors couplings incorporate components manufactured from grade 1.4301 (304) austenitic stainless steel to BS EN 10088-2:1995. This grade meets the requirements of both BS EN 295-4 and WIS 4-41-01 in that it contains a minimum of 17% chromium and 8% nickel.

For conditions requiring higher levels of corrosion resistance then components manufactured from grade 1- 4401 (316) austenitic stainless steel to BS EN 10088- 2:1995 are available to special order. This grade contains 2% molybdenum and is especially suited to marine environments.

Standard Couplings

These couplings comply with the requirements of WIS 4-41-01 and are specifically designed for jointing pipes in sewerage, drainage and similar non-pressure applications where resistance to shear loads is required.

  • On public sewers where couplings complying with WIS 4-41-01 are specified.
  • Repair and maintenance of existing pipelines
  • Connections between pipes of different materials or sizes (Bushes may be required in these circumstances)
  • Making connections by the insertion of new junctions into an existing pipeline
  • Reconnection of laterals on renovated sewers
  • Introducing rocker or hinge pipes outside manholes or structures
  • Jointing short or cut lengths of pipe
COUPLING REF MIN OD (mm) MAX OD (mm) WIDTH (mm) BOX QTY
NSC 115 100 115 120 20
NSC 121 105 121 120 20
NSC 125 110 125 120 20
NSC 137 120 137 120 20
NSC 142 125 142 120 12
NSC 150 130 150 150 12
NSC 165 140 165 150 12
NSC 175 150 175 150 10
NSC 182 160 182 150 10
NSC 200 175 200 150 10
NSC 215 190 215 150 8
NSC 225 200 225 150 6
NSC 250 225 250 150 6
NSC 275 250 275 150 6
NSC 290 265 290 150 5
NSC 310 285 310 190 3
NSC 320 300 320 190 3
NSC 335 305 335 190 3
NSC 345 315 345 190 4
NSC 365 340 365 190 4
NSC 385 355 385 190 4
NSC 412 385 412 190 2
NSC 425 400 425 190 2
NSC 430 405 430 190 2
NSC 445 420 445 190 2
NSC 465 435 465 190 2
NSC 475 445 475 190 2
NSC 495 465 495 190 2
NSC 510 480 510 190 2
NSC 525 495 525 190 2
NSC 540 510 540 190 2
NSC 550 520 550 190 2
NSC 560 530 560 190 2
NSC 580 555 580 190 2
NSC 600 570 600 190 2
NSC 620 590 620 190 2

Provide an inexpensive method of directly jointing pipes of differing outside diameters, without the need to use bushes. The most common application is for connecting PVC-u pipes to a variety of other pipe materials including vitrified clay. These couplings are also suitable for connecting other types of pipes including cast iron and metal pipes (up to a maximum outside diameter of 420mm).

Universal Adaptors

COUPLING REF PIPE 1 OD (mm) PIPE 2 OD (mm) WIDTH (mm) OLD REF
NAC 4000 121/137 to 110/121 100 NAC 1212
NAC 6000 180/200 to 160/180 150 NAC 1804
NAC 9001 260/285 to 180/205 150 NAC 2601

Drainage Adaptors

COUPLING REF PIPE 1 OD (mm) PIPE 2 OD (mm) WIDTH (mm) OLD REF
NAC 1000 97/102 to 86/91 70 NAC 1000
NAC 1153 100/115 to 40/50 102 NAC 1001
NAC 1154 100/115 to 50/64 102 NAC 1002
NAC 1155 100/115 to 75/90 95 NAC 1003
NAC 1221 110/122 to 80/95 120 NAC 1101
NAC 1226 115/122 to 61/68 90 NAC 1004
NAC 5144 110/125 to 100/115 120 NAC 1102
NAC 1361 121/136 to 80/95 120 NAC 1211
NAC 1362 121/136 to 100/115 90 NAC 1213
NAC 1370 122/137 to 75/90 100 NAC 1221
NAC 1452 130/145 to 110/125 120 NAC 1302
NAC 1521 137/152 to 100/115 120 NAC 1371
NAC 1602 144/160 to 110/122 120 NAC 1442
NAC 1603 144/160 to 121/136 120 NAC 1443
NAC 1681 153/168 to 100/115 150 NAC 1531
NAC 1703 155/170 to 130/145 120 NAC 1553
NAC 1762 155/176 to 110/125 120 NAC 1552
NAC 1801 166/181 to 100/115 150 NAC 1661
NAC 1802 166/181 to 110/125 150 NAC 1662
NAC 1922 170/192 to 110/122 120 NAC 1704
NAC 1923 170/192 to 121/136 120 NAC 1705
NAC 1924 170/192 to 144/160 120 NAC 1706
NAC 1981 183/198 to 100/115 155 NAC 1831
NAC 1983 180/198 to 122/137 150 NAC 1801
NAC 2000 180/200 to 130/145 150 NAC 1800
NAC 2003 180/200 to 155/170 150 NAC 1803
NAC 2061 190/206 to 100/115 150 NAC 1901
NAC 2063 190/206 to 138/153 150 NAC 1903
NAC 2121 185/212 to 100/115 150 NAC 1852
NAC 2154 190/215 to 150/165 150 NAC 1904
NAC 2164 185/216 to 160/180 150 NAC 1851
NAC 2254 200/225 to 160/175 150 NAC 2001
NAC 2352 210/235 to 110/122 150 NAC 2102
NAC 2353 210/235 to 121/136 150 NAC 2103
NAC 2354 210/235 to 144/160 150 NAC 2104
NAC 2355 210/235 to 170/192 150 NAC 2105
NAC 2356 210/235 to 190/215 150 NAC 2106
NAC 2654 240/265 to 144/160 150 NAC 2404
NAC 2655 240/265 to 170/192 155 NAC 2405
NAC 2656 240/265 to 190/215 150 NAC 2406
NAC 2657 240/265 to 210/235 155 NAC 2407
NAC 2756 250/275 to 200/225 165 NAC 2502
NAC 2855 260/285 to 240/265 150 NAC 2602
NAC 2904 265/290 to 144/160 150 NAC 2658
NAC 2907 265/290 to 210/235 150 NAC 2659
NAC 3167 301/316 to 259/274 165 NAC 3011
NAC 3204 295/320 to 144/160 165 NAC 2954
NAC 3205 295/320 to 170/192 150 NAC 2955
NAC 3207 295/320 to 210/235 150 NAC 2957
NAC 3208 295/320 to 240/265 150 NAC 2958
NAC 3209 295/320 to 265/290 150 NAC 2959
NAC 3351 310/335 to 180/205 160 NAC 3101
NAC 3600 335/360 to 295/320 165 NAC 3350
NAC 3608 335/360 to 240/265 165 NAC 3358
NAC 3609 335/360 to 265/290 165 NAC 3359
NAC 3763 360/376 to 323/337 165 NAC 3604
NAC 3850 360/385 to 300/325 165 NAC 3603
NAC 3858 360/385 to 240/265 165 NAC 3601
NAC 3859 360/385 to 265/290 165 NAC 3602
NAC 4208 395/420 to 240/265 165 NAC 3958
NAC 4209 395/420 to 265/290 165 NAC 3959

Adaptors for structural walled plastic pipes

COUPLING REF PIPE 1 OD (mm) PIPE 2 OD (mm) WIDTH (mm) OLD REF
NAC 1500 160/170 to 170/192 110 NACUR 150
NAC 2250 240/250 to 260/285 145 NACUR 225
NAC 3000 325/335 to 360/385 165 NACUR 300
 

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