Check Valve Installation and Piping Design Guidelines Webinar

Watch our DFT Inc. webinar on Check Valve Installation and Piping Design Guidelines, presented by DFT Inc. Vice President and General Manager Arie Bregman.

[@yousifalqallaf8095]

Thank you.

[@nevillejohnson768]

what will happen is the check valve is installed right on top of the pump discharge??

[@Dft-valves]

When a check valve is installed right on top of the pump discharge the valve sees a great deal of turbulent flow. This can cause tremendous instability in the closure mechanism of the check valve whether it’s the disc in a swing check or axial flow check or the doors of a double door check valve the closure mechanism will be responding to the turbulent flow. Eventually this constant motion will cause wear and failure. Of the 3 types of check valves mentioned, the axial flow valve may be the best suited for this environment if the design incorporates a single, concentric spring. However it will be very important to do the sizing calculations for the valve to make sure that there is sufficient flow to fully open the disc and that the disc is against the full open internal travel stop. If the valve is oversized, i.e. the flow rate will not bring the valve to 100% open, the disc will be able to chatter and it will eventually wear the stem and bushings in the valve. DFT can provide you with the custom sizing that this valve may need to insure that it will not chatter. Thank you for your question!