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Tilting-disc inconel check valve Check valve symbol on piping and instrumentation diagrams.The arrow shows the flow direction. Vertical lift check valve. A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction.
Sometimes called a check valve or a backflow preventer, a chemigation valve is an apparatus designed to protect water supplies from agricultural chemicals used during chemigation, the application of chemicals such as fertilizers and pesticides through irrigation water. [1]
A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. [1] It is different from the two-way check valves (sometimes erroneously referred to as double check valves) used in air brake systems on heavy trucks which select from the highest pressure source.
One of the biggest decisions anyone has to make for retirement is where to invest money. If you ask 10 different financial advisors, there is a 100% chance you’ll get 10 different answers. This ...
London — A Michelin-starred chef in England called Monday on the thieves who stole his work van, along with about $32,000 worth of meat pies inside it, to embrace the holiday spirit and hand ...
The check valve aspect is a conical valve or 'mitre valve', [i] held against a matching conical seat by a spring. As these valves must work at high pressure, the valve faces are accurately ground to shape. The valve is also held accurately concentric to its seat by a fluted extension, usually cross-shaped or three-winged, below the seat.
A last-minute winter getaway could be just what many people need to escape the mayhem experienced during the holiday season. Fortunately, by waiting until after the new year to travel, you may ...
Most downhole safety valves are controlled hydraulically from the surface, meaning they are opened using a hydraulic connection linked directly to a well control panel. When hydraulic pressure is applied down a control line, the hydraulic pressure forces a sleeve within the valve to slide downwards.