Supa Maxi™ universal tensile couplings for gas supply
Supa Maxi™ sets a new standard
Supa Maxi™ comprises a complete range of large tolerance universal and tensile couplings according to EN 14525 for water, gas and wastewater applications. For gas supply the range comprises straight couplings and flange adaptors in DN50-400, and end caps and step couplings in DN 50-300. The patented SupaGrip™ sealing support system features a flexible bracket, and combined with the unique grip design, it provides superior tightness and tensile resistance on all pipe dimensions and materials.
Flexible bracket with rigid metal backup
SupaGrip™ provides full support and backup of the gasket, even on minimum pipe size within the tolerance range and when used on oval pipes. The flexible bracket is designed to contract and follow the external pipe diameter. As a result, it serves as a solid backup for the gasket and enables full deflection.
When tightening the bolts, the bracket segments and bolts move inwards, securing that the gasket tightens around the pipe and that the grip segments grip into the pipe surface.
Tensile on all pipe materials
Optimum grip and tensile abilities on all pipe materials are secured by means of two different metal grip segments - gunmetal for PE and PVC pipes and hardened stainless steel for iron and steel pipes.
The grip segments are mounted with pins on the bracket segments to provide maximum durability. The high-quality materials safeguard that the sealing does not loose compression over time, and that the coupling stays tensile.
Reduce time spent on installation
The couplings enable ±4° deflection on each side (in total 8°) up to a maximum pressure of PN16. The large insertion depth tolerances allow the pipe to be cut slightly angled. This gives a simple installation without need for precise adjustment. All couplings with a weight exceeding 10 kilos are designed with a lifting eye on the sleeve enabling easy and ergonomically safe handling.
Optimised bolt design
The bolt design is optimised for fast and simple assembly. The number of bolts is kept to an absolute minimum, and they are all standard bolts enabling use of standard tools. The bolts and nuts are anti-friction coated to prevent galling. The bolts are tightened from the sleeve side to ease assembly when space in the trench is limited, and the threads are protected by the permanent protection cap. The nuts are encapsulated in the bracket and covered by a protection cap to ensure that they will not fall off when loosening the bolts. Re-tightening of bolts is not necessary due to the all metal SupaGrip™ sealing support system.
Permanent protection cap
During handling the centre piece of the protection cap covers the sharp grip segments and prevents dirt from settling inside the coupling. When the centre piece is removed the coupling is ready for installation.
High quality materials
- The couplings are designed with sleeves of ductile iron and brackets of cast steel with epoxy coating in compliance with DIN 3476 part 1 and EN 14901, GSK approved.
- The gaskets of NBR rubber are approved by DVGW and Gastec.
- The bolts and washers are of stainless steel A2 as standard and optionally of A4. The nuts are of acid-resistant stainless steel A4.
- The grip segments are of RG5 bronze and hardened stainless steel, mounted with pins of polyamide.
- The permanent protection caps of recyclable PE are yellow for gas applications.
