Bellow valve
3/4 - 2", 150 °C Highlight Technology Corp.

Formed bellows seal stainless valves are typically used for applications with large differential pressures, extremely high cycle rates or "dirty" processes that cause frequent bellows failures. In many vacuum processes, like chemical vapor or thin film deposition, contain particulate contamination. If small particles fall between formed bellows, they have no effect. If similar particles fall between welded, nested bellows, they deform the membranes, cause stress concentration, and lead to early bellows failure. Htc offer two types of formed bellows seal stainless valves, that are angle valve and Y-inline valve. Htc designs all series valves suited for vacuum applications with venting processes, high vacuum applications in pumping systems, semiconductor technology, research systems, etc.
- Body : Polished 304 S.S. (Other material available upon request)
- Port ODs: 3/4~2 inch
- Bellows: 304 S.S formed bellows
- Operation: Air to open, spring to close
- Seal: Viton O'ring
- Leak rate: 2×10-9 std.cc./second
- Pressure range: 2×10-9 torr to 760 torr Vitonr seal bonnet
- Operating air pressure: 4~6 kg/cm2
- Bake-out limitation: 150°C