REGELSTUURINRICHTING VOOR HET REGELEN EN STUREN VAN DE DOORLOOP VAN EEN STROMEND MEDIUM IN EEN BUISLEIDING.

摘要

A valve for controlling the flow of a fluid has a housing with coaxial inlet and outlet ports on opposite sides of a transverse cylindrical chamber. A plunger axially movable in this cylinder has a cylindrical body terminating at its free end in a generally saddle-shaped formation with two convex ridges flanking the flow path, these ridges being separated by a depression of arcuate or trapezoidal profile bottoming substantially tangentially to the ports in a closure position in which the ridges enter a recess at the closed end of the housing. The cylindrical chamber and the recess may be formed in a partspherical insert which is rotatable within the housing about the cylinder axis to block the fluid flow while permitting withdrawal of the plunger for replacement or repair.