| 摘要 |
An excess flow control valve which automatically shuts off when an excessive flow of liquid or gaseous material is detected. The valve uses a flow sensitive piston which is drawn up to cover the valve outlet when the flow exceeds a specified rate. When the piston is seated against the valve outlet, flow ceases, or is reduced dramatically, and the piston is held in place by the pressure of the supply. Additionally, ports are provided to activate a pressure differential device which can be used for remote monitoring and/or valve position, i.e., a red flag or switch, if desired.
|
