How to choose the ideal Couplings
In terms of installation and application, the various kinds of couplings and adapters appear to overlap. To have a better understanding of its different types, Couplings and adaptors can be categorized into two primary groups - dedicated and universal, which can then be divided into tensile and non-tensile varieties, resulting into four main categories.
Dedicated couplings without tensile resistance
Only certain pipe materials with a certain outside pipe diameter can be utilized with these couplings, which have the simplest designs. In other words, the couplings do not allow for tolerances on the outside pipe diameter. Because of its simple design, these couplings are primarily use in new installations when the pipeline is connected to other pipes or stabilized in some other way, such as by backfilling with concrete. Its limited application and simple design will result in a low pricing.
AVK products in this category are combi-flanges series 05/62 for PE and PVC pipes, as well as fabricated couplings series 258 and fabricated flange adaptors series 3260
Dedicated couplings with tensile resistance
The non-tensile couplings and the dedicated couplings in this category are quite similar. Tensile couplings, on the other hand, are made to resist both the mechanical pull and internal pressure from the installation in the pipe. Typically, this kind of connection has grip segments that are positioned beside the gasket unit. When the gasket contracts, the grip segments compress around the pipe, giving the pipe complete resistance to pull. When clients construct new pipes in an open trench without backfilling and need to pressure test the entire pipeline before covering it with soil, specialist tensile couplings are usually the best option.
AVK Products in this category are combi-flanges series 05/60 for PE and PVC pipes, Supa Plus series 621 straight couplings, Supa plus flange adaptor series 623
Universal couplings without tensile resistance
The absolute top products within couplings are these couplings. In addition to providing the necessary flexibility in terms of the outside pipe diameter, they are also capable of withstanding the mechanical draw from the installation as well as the pull from the internal pressure inside the pipe. Because the coupling seals around most pipe materials and stops the pipe from sliding during pressure testing, these two properties make the product prefect for use as a repair product for major restoration projects. To avoid keeping both kinds of couplings in stock, many customers are moving from universal non-tensile couplings to universal tensile couplings, even for minor remodeling jobs.
AVK products in this category are Supa Maxi series 631 straight couplings, series 633 flange adaptors
