HTC has supplied welded metal bellows produced through unique welding method of extra thin diaphragms. Edge welded diaphragm bellows are extensively used in the field of ultra-high vacuum as contamination-free seals for drive mechanism of semiconductor & FPD processing equipments and others. Welded Bellows Feature: -- Wide range of operating temperatures -- Constant effective area with change in pressure -- Excellent spring and pressure deflection characteristics -- Long stroke per unit length -- Short compressed length -- Corrosion resistance -- Leak tightness to less than 1 × 10-9 scc/sec He