Manufacturers frequently release new iterations with minor cosmetic changes or slight variations in mechanics, sometimes just a different face plate, occasionally a different-looking heat-exchanger and so on.

As in so many other industries, primary manufacturers often supply equipment to several brands, which may differ mainly in appearance. This fact can work to your advantage, as certain parts are often interchangeable across these brands.

The following documents try to give technicians a basis, which they can use to quickly flick through pictures of first stages, second stages and valves.

If you spot a mistake, please let me know and I will sort it out. If you have something to add, upload your pictures here and I will add them to the files.

First & Second Stages

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