AN INLET VALVE IN A TWO-TOWER AIR DRIER

摘要

An inlet valve in a two-tower air drier for directing an air flow from a central inlet (17) to either tower (1 or 2) through a respective outlet (18). A valve body (19), which is axially movable between two valve seats (23), is provided with two annular flanges (20) at such an axial distance from each other that at no position of the valve body will a flange cover any part of the inlet. A restricted flow area past the flange (20) is accomplished towards each valve seat. The valve body is biased towards a neutral position by means of a helical compression spring (25), which is attached to the housing (16) of the valve with its two ends and passes through an aperture in a stem (21) of the valve body between the two flanges.