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TILTING DISC CHECK VALVE
Product Description
• Quick closing system
• Stability at low and pulsating flow
• Moderate pressure drop
• Tight sealing of metal seats
Seat contacts don’t occur until the disc is seated and closed.
Product Specifications
DOUBLE OFFSET
A high performance tiling disc check valve has double offset pivot (hinge pin) design. The pivot offsets are made when constructing the valve with hinge pins which are located behind the centerline of sealing surface and slightly to one side of pipe centerline. The offset purpose is to reduce rubbing and thus wear between seat and seal while valve is travelling.
OFFSET 1
The hinge pin is located in the centerline of disc seal surface.
OFFSET 2
The hinge pin is offset to the conical axis.
DESIGN DATA FEATURES
1. Face to face & end to end dimensions : ASME B 16.10
2. Flanged dimensions : ASME B 16.5
3. Butt welded end dimensions :ASME B 16.25
4. Valve size (if applicable) and ratings :ASME B 16.34
5. Wall thickness dimensions of valve comply with API 600
Usage
The center of gravity of disc is very close to the axis or rotation, so that the disc can be opened or closed very quickly without damage to the body, disc or seat.
Since the valve is closed quickly upon flow reversal significant fluid velocities are not developed in the reverse direction, therefore minimizing the effects of water hammer.
The tilting disc check valve has greater stability at low flow rates and in pulsating service when compared to a swing check valve.
The pressure drop across a tilting disc check will usually be much less than for an equivalent life check.
Although a tilting disc check valve will restrict flow slightly more than a swing check, the straight-through flow path provides a minimal pressure drop.
Tilting disc check valve have moderate sealing capability and can provide tight shutoff if the differential pressure across the disc is relatively large.