Here you will find the ideal flange for the connection to a valve. Over the years we have put quite a lot of thought into our flange connections. The result is less leakage and substantially reduced costs with regard to valves.
What is a connection that is in accordance with nominal widths?
Due to differing pipe wall thicknesses but identical flange connection dimensions, marked cross-section variations occur in PE/PP and steel/cast fittings, especially from DN/OD 355 mm. A special flange connection equalises the resulting offset. Depositions and flow problems are minimised. A connection results that is in accordance with nominal widths. In addition, narrow flaps can be used without these hitting the PE stub end. This enables at the same time to reduce project costs.
In some cases both a HP flange and a special flange can be used. However, in the case of valve connections from DN/OD 355 mm we generally recommend the use of a special flange instead of a loose flange connection.