US 10,480,676 B2 · Valve

Abstract

A valve includes a valve mechanism capable of switching a communication state between a first port and a second port of a body. A diaphragm is held between a valve plug and a holder member, at a central portion of the valve mechanism. An outer marginal portion of the diaphragm is held between the body and the bonnet. A pilot channel through which a communication chamber in the body and a pilot chamber in the bonnet communicate with each other is formed in the valve plug. A first hole communicating with the pilot channel is formed at a central portion of the diaphragm. Pressurized fluid in the communication chamber flows into the pilot chamber through the pilot channel and the first hole to thereby bias the valve plug toward a valve seat, by the pressure of the pressurized fluid in combination with an elastic force of a spring.

Claims12

Dependent claims

A valve comprising:

a body having a passage through which a pressurized fluid flows;
a bonnet configured to cover an opening of the body;
and
a valve mechanism provided inside the body and the bonnet, and configured to switch a communication state of the passage,
the valve mechanism comprising:
a valve plug;
a diaphragm in a form of a flexible sheet, a central portion of the diaphragm being held against the valve plug, and an outer marginal portion of the diaphragm being held between the body and the bonnet;
a holder configured to hold the central portion of the diaphragm between the valve plug and the holder;
a pilot hole configured to allow the passage and a pilot chamber of the bonnet to communicate with each other the pilot hole being formed adjacent the central portion of the diaphragm;
and
a fastener fixing together central portions of the valve plug, the diaphragm, and the holder which are stacked together.

8 more elements

A valve comprising:

a body having a passage through which a pressurized fluid flows;
a bonnet configured to cover an opening of the body, to define a pilot chamber;
a valve plug provided inside the body and the bonnet, and configured to switch a communication state of the passage between a passage open state and a passage closed state, the valve plug comprising a body part including a seating portion configured to be seated on a valve seat of the body, and a diaphragm part in a form of a flexible sheet, the diaphragm part extending radially outward from the body part;
and
a spring biasing the valve plug in a direction toward the passage closed state,
wherein an outer marginal portion of the diaphragm part is held between the body and the bonnet;
and
a pilot channel in the valve plug and configured to allow the passage and the pilot chamber of the bonnet to communicate with each other,
wherein at least one of the body and the bonnet has a projection protruding in a thickness direction of the diaphragm part, at a position holding the outer marginal portion;
an end of the projection facing the diaphragm part has an inclined shape where a portion of the end corresponding to a bent portion of the diaphragm part is highest in the end, and the end gets progressively lower in a direction away from the portion of the end corresponding to the bent portion, and
wherein a clearance in a radial direction is formed between the outer marginal portion of the diaphragm part and the body.

8 more elements

Dependencies are inferred from the claim text.

Valve

Life of this patent

Valve

Life of this patent

Abstract

Claims12