Bellows globe valve has no leakage, so it is safe to use in high risk medium.
General globe valves are sealed with packing, the stem and packing will slip, easy to leak at low temperature (valve core).
The bellows globe valve uses the sealed bellows which can be stretched and compressed to replace the packing seal, which can effectively prevent the leakage caused by packing loss. Generally used for medium transportation with strong permeability, such as valves in hydrogen system, as long as the bellows are not damaged, there is no leakage; and generally, globe valves are sealed with packing, which is prone to leakage.
The stem opening or closing stroke of this kind of valve is relatively short, and it has a very reliable cut-off function. Because the change of the seat opening is proportional to the disc travel, it is very suitable for flow regulation. Therefore, this type of valve is very suitable for cutting or regulating and throttling use.