A block and bleed manifold with one block valve and a single bleed valve is often known as an isolation valve or block and bleed valve; a block and bleed manifold with various valves is often called an isolation manifold. Related:oakley valveball valvevalve stem capsvalve indexvalve spring compressoroakleyvalve carvalve capshigh http://valves-and-fittings20739.uzblog.net/5-simple-techniques-for-dbb-valve-9349470