… Taps, cocks, valves and similar appliances for pipes, boiler shells, tanks, vats or the like, including pressure-reducing valves and …
Explanatory notes
… appliances for pipes, boiler shells, tanks, vats or the like, including pressure-reducing valves and … regulate the flow (for supply, discharge, etc.), of fluids (liquid, viscous or gaseous), or, in certain cases, of solids (e.g., sand). The heading includes such devices …