When there is a flow, there is a valve. Valves are a device that controls or directs the flow of a fluid, either gas, liquid, or slurries. They are found in almost every industrial processing such as water and sewage systems, oil and gas processing, power generation, food manufacturing, chemical manufacturing, and many more. They come in different types and can be classified in various ways. The Dual Disc Check Valve is a popular choice due to its compact design and low cost. It’s an all purpose non-return valve which is much lighter, smaller and yet much stronger than the conventional lift check or swing check valve. It is designed to address the shortcomings of those two conventional valves.
Dual Disc Check Valve has a two spring-loaded plates or discs hinged on the central hinge pin. When the flow pressure decreases, the plates close by torsion spring action without the need for reverse flow. Such design provides the advantages of no water hammer and non-slam, spring-assisted closing. The valve is also referred to as the silent check valve. All these features make the Dual Disc Check Valve a very efficient device. It also conforms to several industry standards (APS and API). It is available in a wafer style, lugged, flanged wafer, and extended design with flanged ends. Other major distinct characteristics of this valve include:
- Structurally more sturdy design - the cylindrical body of the valve has a much more uniform stress distribution than the swing check type. It can further be designed to endure extreme weight of valve which makes it great for severe and rugged loading conditions.
- Dual spring action - a Dual Disc Check Valve above 150mm NB are equipped with two springs to prevent disparate forces to act on each plate. This is to achieve an even closing and can be done with single legged or double legged springs.
- Flexible installation - the valve is more rigid than the length of heavy section pipe preventing the need for more support. The spring action which is in place of gravity enables it to be installed both vertically and horizontally.
- Unique feature of plate opening - it prevents rubbing actions against seat since it first lifts up at heel before it swings. This is due to special spring action and hinge design of the valve which also results to lower wear and tear of seals.
All of these competitive edges are carried by Islip Flow Controls Dual Disc Check Valve. Our discs are even equipped with shock bumpers to limit stress in hinge pins. They are available with resilient (metal-to-metal) seats to ensure top performance and best results for your application.