V-contour or M-contour: which press contour suits which application?
V-contour or M-contour: anyone who works with press fittings will regularly come across both designations. But what is behind them and which contour is suitable for which application? The answer is more important than it seems at first glance, because an incorrectly selected press contour is one of the most common mistakes on the construction site.
What press contour means and why it is relevant
The press contour describes the profile with which a press connection is made. During pressing, the press jaw or press ring forms the fitting in such a way that a positive, permanent connection is created with the pipe. The profile of the jaw must match the contour of the fitting exactly. If the jaw and fitting do not match, the result is a connection that looks finished but does not achieve the required tightness and strength.
Two contours have established themselves as standard in Europe: the V-contour and the M-contour. Both are widely used in certain regions and by certain system manufacturers. The regional differences have historical reasons and reflect the market penetration of different system manufacturers in individual countries.
V-contour: widely used and tool-flexible
The V-contour is the most commonly used crimping contour in Germany and large parts of Europe. It is supported by most commercially available pressing tools and is compatible with numerous fitting systems. This makes it the preferred choice for companies that work with different pipe materials and media and do not want to have a separate pressing tool for each application.
The AQUAGAS V system from HS Fittings uses the V contour and therefore allows a free choice of tools. This means that companies do not have to replace their existing pressing tool in order to process AQUAGAS V. This is an economically relevant advantage, especially for companies that have already invested in tools.
M contour: system-bound, but present in the existing building
The M-contour is also widespread, but is more closely linked to specific system manufacturers and their pressing tools. Companies that use M-contour systems require the appropriate tool in each case. This can lead to a bottleneck in existing systems, i.e. when repairing or expanding existing systems, if the original tool is no longer available.
The Flexi-Press system from HS Fittings supports both V- and M-contour up to 28 mm and therefore offers a flexible solution for companies working in mixed stock situations. It is available in E195 steel and 1.4404 stainless steel and therefore covers a wide range of applications. The available seal variants (EPDM, FPM/FKM) enable use in various media.
Warehousing and system selection: What matters
If you consistently standardize your stock to a press contour, you reduce the risk of mix-ups and simplify ordering. Companies that mainly carry out new installations are well advised to rely on the V contour. Companies that do a lot of work in existing buildings may need both contours and benefit from a flexible fitting system. Technical details on all systems can be found in the data sheets and product documentation.
Conclusion: Decide on V-contour or M-contour according to system strategy
The choice between V-contour and M-contour is not just a product question, but an operational strategy. If you are looking for tool flexibility, the V-contour and AQUAGAS V from HS Fittings are the right choice. Those who work with mixed systems will find a practical solution with Flexi-Press. Please contact us for individual advice on the right choice of system.
