Tilting Disk Check Valves

Mechanical Science Volume 2 of 2
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TYPES OF VALVES DOE-HDBK-1018/2-93 Valves Straight body swing check valves contain a disk that is hinged at the top. The disk seals against the seat, which is integral with the body. This type of check valve usually has replaceable seat rings. The seating surface is placed at a slight angle to permit easier opening at lower pressures, more positive sealing, and less shock when closing under higher pressures. Swing check valves are usually installed in conjunction with gate valves because they provide relatively free flow. They are recommended for lines having low velocity flow and should not be used on lines with pulsating flow when the continual flapping or pounding would be destructive to the seating elements. This condition can be partially corrected by using an external lever and weight. Tilting Disk Check Valves The tilting disk check valve, illustrated in Figure 23, is similar to the swing check valve. Like the swing check, the tilting disk type keeps fluid resistance and turbulence low because of its straight-through design. Tilting disk check valves can be installed in horizontal lines and vertical lines having upward Figure 23 Operation of Tilting Disk Check Valve flow. Some designs simply fit between two flange faces and provide a compact, lightweight installation, particularly in larger diameter valves. ME-04 Rev.0 Page 36

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