… for pipes, boiler shells, tanks, vats or the like, including pressure-reducing valves and thermostatically …
Explanatory notes
… or a gas. The appliances regulate the flow by opening or closing an aperture (e.g., gate, disc, ball, plug, needle or … a key, wheel, press button, etc.), or by a motor, solenoid, clock movement, etc., or by an automatic device such as a … etc., incorporating such mechanisms or devices remain classified in this heading. This applies, for example, to a …