Multi-operational valve

摘要

A valve for selectively fluidly communicating a first fluid volume and a second fluid volume includes a valve body, an inlet orifice in fluid communication with the first fluid volume, and an outlet aperture in fluid communication with the second fluid volume. The valve also includes an activation member axially movable relative to the valve body. The valve is operable in a first mode in which the valve opens in response to manual actuation of the activation member. The valve is operable in a second mode in which the valve opens when a pressure difference between the first and second fluid volumes reaches a predetermined value, and the valve closes when the pressure difference between the first and second fluid volumes is less than the predetermined value.

主权项

1. A valve for selectively fluidly communicating a first fluid volume and a second fluid volume, the valve comprising:
a valve body; an inlet orifice in fluid communication with the first fluid volume; an outlet aperture in fluid communication with the second fluid volume; an activation member axially movable relative to the valve body; a first plunger axially movable within the body, the first plunger including a central aperture that provides a fluid flow path between the first and second fluid volumes; a second plunger including a contact surface, the second plunger being axially movable relative to the first plunger between a sealed position in which the contact surface engages the central aperture to form a seal with the central aperture that prevents fluid flow through the central aperture, and an unsealed position in which the contact surface is spaced from the central aperture to permit fluid flow through the central aperture; and a biasing member that biases the second plunger toward the sealed position, wherein the valve is operable in a first mode in which the valve opens in response to manual actuation of the activation member, and wherein the valve is operable in a second mode in which the valve opens when a pressure difference between the first and second fluid volumes reaches a predetermined value, and the valve closes when the pressure difference between the first and second fluid volumes is less than the predetermined value.