| 摘要 |
A pneumatic system includes a first line configured to be coupled to a container, and to convey a flow of gas from a source to the container, a second line in communication with gas in the container, a valve coupled in series with the first line, between the source and the container, and a spring member. The valve includes a body having a first port, a second port, and an exhaust port, and the valve includes a moveable element in communication with the second line and is configured to control the flow of gas through the first line as a function of the pressure of the gas within the container. The spring member is positioned to apply a biasing force to a first side of the moveable element, and the second line provides a feedback to a second side of the moveable element. |
| 主权项 |
1. A pneumatic system, comprising:
a first line configured to be coupled to a container, and to convey a flow of gas from a source to the container; a second line in communication with gas in the container; a valve coupled in series with the first line, between the source and the container, wherein the valve comprises:
a body having a first port, a second port, and an exhaust port; anda moveable element operable within the body to selectively: limit the flow of gas through the first port, the second port, and the exhaust port; place the first port in fluid communication with the second port; and place the container in fluid communication with the exhaust port,wherein the moveable element is in communication with the second line and is configured to control the flow of gas through the first line as a function of the pressure of the gas within the container; and a spring member positioned to apply a biasing force to a first side of the moveable element, wherein the second line provides a feedback to a second side of the moveable element. |
