Читать книгу Mechanics of the Household - E. S. Keene - Страница 68

—If little keyed air valves (sometimes called “pet-cocks”) are used, follow generally the same directions as outlined for hot-water radiators on page 49—only, of course, in releasing the air from the radiator open the valve with the key provided and close it just as soon as the steam unmixed with air comes through the nose of the valve.

If “automatic” air valves are used they must be carefully adjusted by the steam-fitter and then left to operate without undue interference.