Tag: check valves

In order to choose a suitable check valve in a right way, several selection criteria should be considered. However, no type of check valve is the best choice for all applications, and the selection criteria may not be equally applicable for all situations. You need to consider the following items: applicability of check valves, nominal diameter of check valves, flow characteristics, head loss, non impact characteristics, and total cost of ownership.

Check valve refers to the opening and closing parts for the round valve and rely on their own weight and media pressure to produce action to block the medium backflow of a valve. Belong to the automatic valve category, also known as check valve, check valve, backflow valve or isolation valve. Flap movement is divided into lift and rotary type. Lift check valve and globe valve structure is similar, only the lack of valve stem to drive the valve flap. The medium from the inlet side (lower side) inflow, from the outlet side (upper side) outflow. When the inlet pressure is greater than the weight of the valve and its flow resistance and when the valve is open. Conversely, the medium backflow valve is closed.