Tilting Disc Check Valve

Advantages:

• Stability of low and pulsating flow
• A moderate drop in pressure
• Tight metal seat sealing
• Seat contacts occur only after the disc is seated and closed. 
• Quick-closing system

The Tilting Disc Check Valve accomplishes full flow opening by pivoting the disc in the flow media. The opening stroke range is much less than the conventional swing check valves, which reduces opening and closing time. It is critical to controlling flow reversal and reducing water hammer. The tilting disc check valve offers the solution by allowing a fast closing, even with little flow loss.

Tilting disc check valve is designed to open and close faster than standard ones. Rapid operation is required whenever critical components must be protected against backflow immediately. However, many other check valves can only close when the upstream flow is lost completely.

In systems where backflow can occur rapidly, such as pump systems in a high-pressure system, this can lead to major problems. The resulting water hammer can disrupt entire piping and pump systems in extreme cases.
 

Tilting Disc Check Valve Drawing

Main Part & Typical Material

Application

Because the disc of a tilting disc check valve is mounted at a 15-degree angle, it opens at a medium speed, beginning at 0.6 m/sec with a short response time, which prevents the disc from ‘hammering’ at low speeds and prevents wear on the stem, springs, and bearings. The self-centering seal provides an excellent seal at both high and low-pressure differentials. In addition, the valves can be included with extra springs to increase the response speed if there is a high risk of rapid backflow.

The result is a stable check valve with a fast response time that requires minimal maintenance, which makes this valve suitable for any application requiring a quick response.

How does a tilting disc check valve work? 

A tilting disc check valve operates by employing pressure difference. This feature makes the valve operate automatically without a valve actuator, handwheel, or lever. The pressure difference is the principle in which the valve disc opens when the suction pressure is higher than the outlet pressure, and it is high enough to produce energy sufficient to push the disc open. The pump of the piping system provides the fluid pressure. Once the suction fluid pressure opens the valve, it keeps flowing through the valve until the suction pressure drops to be less than the outlet pressure or when there is backflow. In the instance of low suction pressure or backflow, the valve disc automatically reverts to the seating position.

Tilting disc check valve manufacturers also use springs to help the disc return to the seating position immediately after fluid pressure reduces. Such a valve can be installed in either vertical or horizontal positions.