Avk Air valve has a division by series.

Avk Air valve has a division by series. If you have a valve air exhaust automatic series 701/10, then there is a restriction on its use (cannot be used in wastewater). In addition, there is a certain kind of material and other qualities. Avk Air Air Combined, series 701/40 is a special design that can withstand the maximum operating pressure of 16 bar and possessing a number of innovations (holding a key, etc.).