Know about various types of Tube
A bleed or drain valve can be found in one type, which has two independently seated valves. Double isolation and bleed are a term used to describe this combination (DIB). The DIB valve can be used to vent or bleed the cavity and isolate the pipework on either side of the valve (bi-directionally).
With ISO 9001:2008 certification, a good company produces high-quality Instrument Valves as well as piping components.