ABSTRACT
In principle, industrial valves are faucets. Like faucets, valves are components used to control flow and pressure in a piping system, from fully open (full flow) to fully closed (isolation), and anywhere in-between (flow regulation). There are four main types of valves: (1) block valves (isolation, on-off service), (2) flow control valves (regulating, throttling), (3) check valves (non-return, back-flow prevention), and (4) pressure relief valves (liquid relief valves, gas safety valves).
