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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

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

Drainage Adaptors

Adaptors for structural walled plastic pipes