Bellows type

The types of bellows available are desribed on Products page of this site. For example, if an axial bellows is suitable and the working pressure is 6 bar, then the bellows type is expressed as

Nominal bore

The nominal bores available are given in the first column of each data sheet. Assuming, for example, that you are working in 300 mm pipe, the second part of the identification code would read

Total movement

Knowing the operating temperature and the pipe material, the thermal expansion can be calculated using the coefficients given in the table on the Materials page. Assuming that the total movement is less than 70mm, the third part of the code would read

End fittings

The standard end fittings available are shown in the table bellow. If for example, you require end fittings to DIN 2631 then the fourth part of the code would read

Accessories

Finally, the codes for shrouds and sleeves are as follows
0 - no accessories required
1 - sleeves required
2 - shrouds required
3 - sleeves and shrouds required