What is tilting disk check valve
The tilting disk check valve is self actuated,one way or non return valve 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.The straight through design of tilting disk offers many advantages as compared to other designs.
Tilting disk check valve How it Works
In this self actuated valve, valve disk lifts off of the seat to open the valve. The airfoil design of the disk allows it to "float" on the flow. Valve disk stops built into the body position the disk for optimum flow characteristics.
A large body cavity in tilting disk check valve helps to minimize flow restriction. As flow decreases, the disk starts closing and seals before reverse flow occurs. The Back pressure against the disk moves it across the soft seal into the metal seat for tight shutoff without slamming. If the reverse flow pressure in tilting disk check valve is insufficient to cause a tight seal, the valve may be fitted with an external lever and weight.
Installation and application of Tilting Disc Check Valves
Tilting disc check valves may be installed in horizontal and vertical positions.Tilting disk check valves are available in variety of designs.Some valves are available with a soft seal ring, metal seat seal, or a metal-to-metal seal. The latter is recommended for high temperature operation. The soft seal rings are replaceable, but the valve must be removed from the line to make the replacement. HVAC engineers should also demand valve drawing and complete maintenance schedule from supplier to keep it in correct and optimized working condition.