These compounds consist of the following three elements made of resistant crusty food Brass:
1. sealing sleeve;
2. Split locking ring;
3. knurled crimp nut with internal thread.
In the case of connections for PEX pipe and crimp evalREH nut has an internal metric thread: M 22 x 1,5 pipe Ø16; M 28 x 1,5 pipe Ø20; M 34 x 1,5 pipe Ø25.
Use screws with fine thread provides the most tight connection and provides a leak in the change in temperature of the system. In floor PEX radiant heating systems, to connect to the PEX pipe (20 x 2.0 mm) is used crimp nut with female thread G 3 / 4 “. When choosing a set with PEX crimp connection nut should be remembered that the Split locking ring and nut for PEX pipe and evalREH are the same size, and sealing plugs are different. The difference is explained by the fact that PEX pipe Ø16-25 mm are designed for systems under pressure of 10 bar and pipe evalREH – 6 bar. PEX pipe wall thickness are as follows: pipe Ø16- 2,2 mm for pipe Ø25-3, 5 mm, and thickness of pipe walls evalREH are smaller and are as follows: pipe Ø16 mm – 2.0 mm for pipe Ø25 mm – 2,3 mm.
Each sealing sleeve on the outside caused the size of the pipe, for which it is used. The catalog of products Uponor Wirsbo sets represented crimp nuts for the PEX pipe used in water andPEX radiant heating systems, and depending on it are individually numbered.
Note: when using PEX pipe evalREH pressure of 10 bar, it is necessary to use mechanical screwed connection with crimp nuts for water supply systems (for PEX pipe Uponor Wirsbo-PEX).