초록 ▼

A passive leak detection device may include a pressure switch, a check valve and a balance valve. The pressure switch may include an electric input lead, an electric output lead, a balance chamber and an inlet chamber. A pressure differential between the balance chamber and the inlet chamber may be

A passive leak detection device may include a pressure switch, a check valve and a balance valve. The pressure switch may include an electric input lead, an electric output lead, a balance chamber and an inlet chamber. A pressure differential between the balance chamber and the inlet chamber may be operable to couple the electric input lead to the electric output lead. The inlet chamber may be fluidly coupled to a fluid port. The balance chamber may be fluidly coupled to the fluid port with a check valve disposed there between. The balance chamber may be fluidly coupled to a balance valve. When the balance valve is closed and fluid is flowing out of the fluid port, the pressure differential from the inlet chamber to the balance chamber is operable to couple the electric output lead to the electric input lead thereby indicating of a leak.

대표청구항 ▼

What is claimed is: 1. A passive leak detection device comprising a pressure switch, a check valve and a balance valve wherein:the pressure switch comprises an electric input lead, an electric output lead, a balance chamber and an inlet chamber, wherein a pressure differential between the balance ch

What is claimed is: 1. A passive leak detection device comprising a pressure switch, a check valve and a balance valve wherein:the pressure switch comprises an electric input lead, an electric output lead, a balance chamber and an inlet chamber, wherein a pressure differential between the balance chamber and the inlet chamber is operable to close the pressure switch and is further operable to electrically couple the electric input lead to the electric output lead;the inlet chamber is fluidly coupled to a fluid port;the balance chamber is fluidly coupled to the fluid port with a check valve disposed between the balance chamber and the fluid port such that fluid flowing from the fluid port to the balance chamber passes through the check valve, wherein the check valve is oriented to prevent fluid flow from the balance chamber to the fluid port; andthe balance chamber is fluidly coupled to a balance valve, wherein:when the balance valve is open, the pressure differential between the inlet chamber and the balance chamber is zero and the electric input lead is not electrically coupled to the electric output lead;when the balance valve is closed and fluid is flowing into the fluid port, the pressure differential between the inlet chamber and the balance chamber is zero and the electric input lead is not electrically coupled to the electric output lead; andwhen the balance valve is closed and fluid is flowing out of the fluid port, the pressure differential from the inlet chamber to the balance chamber is positive and the electric input lead is electrically coupled to the electric output lead thereby providing an electrical signal indicative of a leak.