УЗЕЛ СТВОРЧАТОГО КЛАПАНА С УРАВНИТЕЛЬНЫМ УСТРОЙСТВОМ ДЛЯ ПРИМЕНЕНИЯ В СЛУЧАЯХ ЗАХЛОПЫВАНИЯ ШАРНИРНОЙ ЗАСЛОНКИ С ВЫСОКОЙ СКОРОСТЬЮ

摘要

A flapper valve assembly is described having an equalizing port assembly with a bleed valve member that is moveable between an open position and a closed position. The equalizing port assembly features a structural support member in the form of a retainer key that is secured to the flapper valve member both axially and radially. Additionally, a compressible spring is located between the structural support member and provides biasing force upon the valve member to urge it toward a closed position. Additionally, the flapper valve member presents a pair of raised, substantially flat actuator contact portions upon its downstream face to meet an actuating tube in a mating contact arrangement and resist material deformation that could tend to clog or block the equalizing fluid flow port.