Open main navigation Deutsch (Deutschland) BOA Metal bellows Flexibility and tightness at the highest level of precision BOA metal bellows are produced from ductile metallic materials for a durable lifetime lasting. Home » BOA Products & components » Industrial Products » Metal bellows Edge welded bellows & formed bellows We offer two different kinds of metal bellows: Edge welded bellows Formed bellows The basic element for formed bellows, a thin-walled cylindrical tube, is formed into corrugations using hydraulic or mechanical pressure. Different procedures and corrugation geometry are adopted depending on the production quantity and application. Edge welded bellows are manufactured with individual metal diaphragms that are welded together. Long life expectancy Whether formed or edge welded, BOA metal bellows: are extremely flexible, have a long life expectancy, do not need any maintenance, are resistant to pressure and to temperature, are vacuum-tight. Applications for metal bellows BOA metal bellows are typically used as: shaft seals of valves vibration absorbers in laser systems volume compensators in transformers actuators in measurement and control applications flexible connection between solar panels sealing or ducting elements in vacuum applications temperature sensors surge arrestors reservoirs to store fluids pressure sensors Characteristics of edge welded bellows & formed bellows Formed bellows Characteristics of BOA formed bellows: single or multi-plied offer considerable axial, lateral or angular movements diameter 6 to 2100 mm can have a special coating (cu, au) and surface finishing made from special materials like titanium, NI-alloys special thermal treatment’s Welded bellows Characteristics of BOA welded bellows: single or multi-plied diameter 6,4 to 584 mm almost unlimited span (distance ID to OD) compressible to solid height have a much longer stroke per convolution can be made of any rollable, weldable metal extremely low spring rates possible resistant to nicks and dents a high degree of translational & arcuated motion diaphragms: wide thickness range How can we help you? If you want any information or if you need any help? Just visit our online expert center. Here you find information on all our products or you can contact one of our engineers about your challenge. We will be glad to support you. Visit our Expert Center BOA-Constructor BOA EJ Pricelist To the BOA download area Inventors of the Ultimate Connection BOA Markets BOA Automotive BOA Industrial BOA Hydrogen BOA Aerospace Products & components Metal bellows Expansion Joints Exhaust components Engine management Fuel Systems About the BOA GROUP Our plants worldwide Our sales offices worldwide Careers About the BOA GROUP Customer service Expert Center Contact us Download area Your challenge Imprint Privacy Policy Terms & Conditions EN ⇒ DE Cookies BOA Group uses cookies to offer the basic functionality of the website, to generate user statistics using Google Analytics on an anonymous basis to make our website more user friendly. We process personal data in compliance with GDPR. Approve Settings Imprint Read more in our privacy policy