Relief valve for releasing air from water pipes under pressure has chamber with upper and lower cones with seal and spacers respectively for spherical float

摘要

The air release valve consists of a chamber (1) linked to a high point on the water circuit (4) and having an outlet (20) and a spherical float (6). The chamber has upper (2) and lower (3) cones with a seal ring (5) and spacers (31) respectively for the float, so that water filling the chamber holds the float against the seal ring, while air in the chamber allows the float to drop, letting the air out. The spacers keep the float above the bottom of the chamber so that air can pass it.