Metal Bellows
90Pages

BOA METALLBÄLGE RATGEBER METAL BELLOWS CONSULTANT

BOA METAL BELLOWS CONSULTANT Issue 27.2-UK BOA AG Expansion Joints Metal Bellows and Metal Hoses Station-Ost 1 CH-6023 Rothenburg Switzerland Phone: +41 (0)41 289 41 11 Fax: +41 (0)41 289 42 02 E-Mail: sales@boa.ch Homepage: www.boa.ch

BOA METAL BELLOWS CONSULTANT Contents 1. General Information • Presenting BOA Group and BOA AG • Our product range 4 2. Metal Bellows Applications • Applications for Metal Bellows • Construction of the BOA Metal Bellows • Application examples • General information on the Bellows Tables 6 3. Information on using the Bellows tables Calculating the admissible Bellows data • Information on the table sections with reference to calculating the overall length • Necks • Connections and joining methods • Bellows calculation 11 4. Bellows Tables • Bellows table 1 Bellows made of stainless steel •...

Presenting BOA Group and BOA AG BOA Group, Stutensee, Germany BOA Group is one of the world's leading manufacturers for flexible mechanical elements for the automotive industry and for a wide range of industrial applications. The headquarter is based in Stutensee near Karlsruhe /Germany. Until August 2006 BOA operated under IWKA Balg- und KompensatorenTechnologie GmbH. About 20 subsidiaries and holding companies in eleven countries are now belonging to the new BOA Group. Additionally, the organization keeps sales and service offices in the most important industrial countries. BOA Group...

BOA AG, Rothenburg, Switzerland BOA AG, based in Rothenburg near Lucerne, was founded in 1906. Over 200 employees are responsible for development, production, marketing and sales of high-quality expansion joints, metal bellows, metal hoses and plastics components. BOA AG is supported by its subsidiaries and holding companies in France, the Netherlands, Poland, Germany, USA and by agencies in all major industrial countries. The partly varying technologies within the BOA Group form a meaningful symbiosis for covering the needs of our customers. BOA AG is an internationally recognized company...

Visit our Website www. boa.ch www.boagroup.com 6

7 Metal bellows applications Construction of the BOA metal bellows Our metal bellows range includes single and multi-ply types in a variety of bellows geometries. Our wide range and know-how in this specialist area allows us to find the best technical and economic solution to our customers’ problems. The BOA standard convolution profile is the compensation tube bend. It combines all the properties necessary for a pressure vessel with high flexibility and long life – even when exposed to high operating pressures. We also make special convolution profiles for special applications • We advise...

8 Application examples Plant and chemical Engineering Valves Electrical engineering • Shaft seals • Axial face seals • Bellows couplings • Tank valves • Spindle seals for valves • HT and MT switchgear • Expansion vessels • Strain gauges / pressure switches Metal bellows applications

Measuring and control engineering Solar / heating engineering Vacuum engineering • Spindle seals • Pressure gauges / pressure measuring equipment • Weighing equipment • Underfloor heating distributors • Solar panel connections • ISO-KF, ISO-K, CF connections and components • Valve spindle seals 9 Metal bellows applications

10 Our bellows tables offer a wide range of bellows sizes and types. For economic reasons, we recommend the standard series marked for smaller volumes. If different dimensions are absolutely essential, we can make other special sizes. This catalogue contains two separate tables, one for special steels with the basic material 1.4541 and one for non ferrous metals with the basic material 2.1020. However, these tables can also be used for other materials, with the aid of the correction factors described in the following section. Special steel bellows table: For all special steels listed in our...

3 Information on using the bellows tables Calculating the admissible bellows data Section Section N° Explanation of the table sections Page 3.1 1 Nominal dimension 12 2 Position 12 3.2 3 Inside diameter 12 4 Tolerance 12 5 Outside diameter 12 6 Tolerance 12 3.3 7 Number of plies 12 8 Ply thickness 12 3.4 9 Convolution pitch 12–13 (calculation of the corrugated bellows length) 3.5 10 Maximum number of convolutions 14 3.6 11–17 Dimensions of the necks 14–19 Connections and joining methods 3.7 18 Calculated overpressure * 20–25 3.8 19–21 Stroke 26–29 per convolution * 3.9 22–24 Spring rate...

12 3.1 Nominal dimension and position Sections 1 + 2 The nominal dimension indicated largely corresponds to the inside diameter of the bellows and also means that the right bellows can be found quickly and without any problem. The bellows, together with the size and item number gives a precise indication of the bellows type selected. 3.2 Bellows inside diameter, Bellows outside diameter Sections 3–6 Apart from the diameters and tolerances listed, different special types are also available subject to consultation. 3.3 Number of plies and ply thickness Sections 7 + 8 The choice of the number...

Neck AB–AB AL = 4.5 . Lw TL = AL+ (2·L2) Active convolutions = 4 Neck SAG–SAG AL = 5.5 . Lw TL = AL Active convolutions = 5 Neck SAG–HB AL = 5 . Lw TL = AL + L1 Active convolutions = 5 Neck IB–IB AL = 4.5 · Lw TL = AL + (2·L3) Active convolutions = 4 Neck HB–HB AL = 4.5 . Lw TL = AL + (2·L1) Active convolutions = 5 Neck IG–AG AL = 5 . Lw TL = AL Active convolutions = 4.5 13 Information

Neck AB – AB Neck IB – IB Mainly for small quantities and individual components. Which of these two shapes is more economical depends on the shaping process and has to be decided in each individual case. 14 3.5 Max. number of convolutions Section 10 The number of convolutions listed in this section represents the maximum convolution of existing tools. If you want a type with more corrugations, we will be pleased to discuss what we can offer. 3.6 Edge shapes, connections and joining method Sections 11–17 The technical bellows tables give the standard necks with detailed dimensions. As has...