Dec 1 20Mass air flow sensor cleaning. Excess Flow Valves on Storage Tanks Piping. There are various types of check valves used in a wide variety of. Excess Flow Valve Malema Excess Flow Valves are normally open, in-line safety devices that act to limit flow of liquids or gases out of a pressurized system.
Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. Valve Manufacturers, Valve Factories and Valve Products.
Check valve - A check valve, clack valve, non-return valve, reflux valve, retention valve or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. A constant flow rate even while demand for water, or upstream or downstream pressures are changing, can offer valuable protection for flow rate sensitive equipment and water distribution systems. While they will pass normal flow rates, they will close when the flow rates exceed the preset value. Maric Flow Control valves maintain a fixe pre-set and constant flow rate regardless of pressure.