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A check valve, also known as a non-return valve, is a valve that allows fluid to flow in one direction only. Learn about the different types of check valves, such as ball, diaphragm, swing, butterfly, and stop valves, and their uses in pumps, industrial processes, and domestic devices.
A double check valve is a device that prevents water supplies from contamination by backflow. It consists of two check valves in series and is suitable for low hazard applications such as irrigation and fire sprinkler systems.
A piping and instrumentation diagram (P&ID) is a detailed diagram in the process industry that shows process equipment and control devices. Learn about the symbols, functions, and applications of P&IDs, and see examples and standards.
ISO 10628 is a standard for diagrams for the chemical and petrochemical industry, specifying their classification, content, and representation. It consists of two parts: Part 1 for diagram specification and Part 2 for graphical symbols.
ISO 14617 is a library of graphical symbols for diagrams used in technical applications. It consists of 15 parts, covering various types and applications of devices and functions, and is developed in cooperation with IEC 60617.
A duckbill valve is a check valve with a rubber or elastomer flap shaped like a duck's beak. It is used in medical and marine applications to prevent backflow of fluid.
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Water hammer is a pressure surge or wave caused by a sudden change in fluid flow or direction. It can cause noise, vibration, pipe damage, and other problems in water systems. Learn about its history, causes, effects, and solutions.