VALVE WITH AXIALLY SPACED GUIDES AND BELLOWS OPERATOR

摘要

A valve having a straight tubular housing is provided with a transverse valve seat and a valve disc mounted on a stem having two axially spaced portions which are guided by elements fixed on the valve housing for precisely axial movement of the valve disc toward and away from the valve seat. The valve stem is moved by pressure fluid in bellows in one direction, and by a return spring and/or pressure of the controlled fluid in the other direction.