About Bellow Seal Valve
Bellow Sealed Valves are a unique technology for industrial valves that are meant to Zero valve leakage. They are also known as "gland-less" "emission-free valves.". A metallic bellow assembly is welded to the valve bonnet at one end and the stem at the other end of these valves, supplying standard gland packing. The bellow expands or contracts in response to the valve stem’s stroke action (open / closed). There are no sliding or rotating seals, allowing process fluid to pass through.