Advantages of PE pipes within water supply
For most applications, PE (polyethylene) pipes have advantages over pipes of more traditional materials like PVC or cast iron. Primarily it gives you a fully welded pipe system with no bolts, no mechanical joints and thereby a much lower risk of leakage and defects.
The PE pipes have an extended service life compared to traditional pipe materials. The pipes are corrosion resistant and as they are relatively light weighted, the PE pipes are easy to handle and transport.
The fusion and electro welding processes provide a joint which is even stronger than the pipe itself and allow for the pipes to be welded above ground, rather than in the trench, for easy installation. In addition, PE pipes can be installed in a trench, which is not in level. There is no need to level the soil in the trench, as the PE pipes are flexible and follow the terrain. Furthermore, there are no special requirements for the soil conditions and less space is needed in the trench for the installation. PE pipes can also be used for installations submerged under water and they are typically the preferred choice for relining or pipe cracking applications. Finally, the soft PE material allows the pipes to be squeezed together for a temporary shut-off during repair.
A fully welded PE pipe system – up to 630 mm with AVK valves
The advantages of using PE pipes are many and so are those of using valves with pre-mounted PE pipe ends as part of your PE pipe system. Most importantly, the valves with PE pipe ends will be an integrated part of the PE pipe system. There will be no couplings with the risk of leaks, the joints will be as strong as the pipe itself – and thus as the rest of the system – and no bolts can come loose and cause couplings or flanges to leak if the ground settles around the valve.
Same approvals and welding parameters for the entire system
To obtain the full advantage, the PE pipe ends on the valve must though be made of the same PE material as the PE pipes used in the installation. When using the same PE material for both valves and pipes, the same welding parameters can be used for all joints and costly mistakes during installation can thereby be avoided. And not least, the same PE pipe approvals will be valid throughout the entire system.
AVK gate valves with PE ends can be fully integrated
Our valve design allows us to mount all standard PE pipes on the valves. When using AVK valves, you can therefore obtain a pipe approval that covers the entire PE network including valves. The extra-long pipe ends even leave room for an additional weld, if needed.
The demand for PE pipe systems has increased due to the obvious benefits. Due to global climate change and water scarcity, water must be transported over long distances, and therefore the demand for PE pipe systems in large sizes is also on the rise. To accommodate this, AVK gate valves with PE pipe ends for water supply are available for pipe sizes 75 mm to 630 mm.
Renowned AVK valve design – as tight as the pipe itself
In our production process a piece of standard PE pipe is pressed directly onto the grooved valve end, and the grooves combined with a sleeve around the valve/pipe connection ensure that the PE pipe material is firmly secured and that the connection remains tight and tensile during the entire service life of the pipeline. The connection is sealed with a shrink hose to provide corrosion protection.
AVK gate valves – the safe choice
AVK valves comply to the highest standards and hold worldwide drinking water approvals for coating, rubber and brass materials and for the valve itself. AVK valves are a sustainable choice primarily due to our high quality and durability but also due to our sustainable production processes. Read more in Reduce your Total Cost of Ownership.