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Wafer Check Valves
Check valves are essential components that open when there is forward flow and automatically close to prevent reverse flow. Their primary purpose is to protect mechanical equipment, particularly pumps, from damage caused by backflow. These valves can be classified based on how the closure member moves onto the seat. Overall, their crucial function is to safeguard internal components of equipment from potential harm.
The Swing Check Valve is equipped with a flat disc that rotates or swings on a hinge pin. These valves are known for their affordability and minimal pressure loss when fully open. However, in vertical pipe setups, the conventional swing check valve may cause slamming due to the lengthy stroke and disc's inertia. To mitigate this issue, additional accessories like levers and weights can be added. These valves are suitable for handling liquids containing solid particles such as wastewater.
The Double Disc Check Valve, also known as the dual disc check valve, offers the most compact design among swing check valves. Typically featuring a wafer style body that conveniently fits between two pipe flanges, this valve utilizes a hinge pin to allow two opposing D-shaped discs to rotate. To aid in closing the discs, a torsion spring is positioned around the hinge pin. However, it is important to note that this type of valve is not suitable for wastewater containing solids, as the spokes present on the valve body can gather debris. The compact and lightweight nature of the double disc check valve, coupled with its short travel and rapid plate closing, make it highly suitable for applications requiring frequent flow reversals while minimizing slamming. On the downside, this design results in increased flow resistance since the plates are consistently positioned in the flow path. Hence, the double disc check valve is best suited for clean liquid applications. To summarize, this valve's characteristics provide a concise and efficient solution for controlling fluid flow.
Another variety of check valve is the center guided lift Silent Check Valve. These valves are designed to be installed in-line and have spring-loaded discs that move up and down the pipe's axis over a short distance to close automatically in a matter of moments. Due to their rapid closure, these check valves almost never slam, which has resulted in their classification as the "silent" type. They are uncomplicated, self-operating, and very cost-effective, but there is a downside to their use in the form of higher power bills in the long run. Despite that, they are very dependable and can be manufactured inexpensively. Silent check valves are a practical choice for applications where noise from valves is a frequent problem, like high-rise buildings and high head systems. They function well in clean liquid environments.
Water hammer prevention relies on quick closure, making it essential to consider the speed at which the check valve closes. The closure speed of a center guided silent check valve is crucial in minimizing the likelihood of water hammer. Additionally, when the valve is nearly closed, the amount of reverse flow is minimal, further reducing the risk of water hammer. Conversely, swing check valves, whether single or double disc, may exhibit a greater proportional flow rate compared to their percentage of openness. This means that a higher amount of reverse flow might be present, increasing the potential for water hammer. Hence, the choice of valve design and its corresponding closure characteristics play a significant role in water hammer prevention.
For many years, the Dual Plate Wafer Check Valves have been the top choice in the industry. This is owing to their demonstrated dependability and minimal pressure drops. All of our check valves are subject to rigorous API 598 testing to guarantee their exceptional performance. Additionally, they have been designed to meet or surpass all pertinent API, ANSI, and ASTM standards.
Other types of check valves pale in comparison to the impressive advantages offered by Dual Plate Wafer Check Valves. Their superiority lies in their design and functionality. These valves, with their wafer-like shape, possess unique qualities that set them apart.
First and foremost, the dual plate configuration of these check valves enhances their performance. Unlike other types, these valves employ two plates that move together in a synchronized manner, allowing for improved sealing and reduced leakage. This design ensures that the flow of media is efficiently controlled, preventing any backflow or reverse flow.
Additionally, Dual Plate Wafer Check Valves are known for their compact and lightweight construction. Their space-saving design makes them ideal for applications where installation space is limited. The lightweight nature of these valves also reduces stress on piping systems, minimizing the need for additional support mechanisms. This not only simplifies the installation process but also reduces costs associated with equipment and maintenance.
Furthermore, their simplified operation and maintenance make Dual Plate Wafer Check Valves highly desirable in various industries. Due to their wafer-like shape, these valves can be easily installed between flanges, eliminating the need for complex modifications to the pipeline. Moreover, their straightforward design allows for quick inspection and cleaning, minimizing downtime and maximizing operational efficiency.
In conclusion, the advantages offered by Dual Plate Wafer Check Valves are truly impressive. Their dual plate configuration, compact design, and simplified operation make them superior to other check valve options. These valves have proven to be highly effective in preventing backflow and reverse flow, while their easy installation and maintenance make them a cost-effective choice for a wide range of applications.
Low Pressure Drop (High Cv)
Compared to other types of check valves such as swing or lift valves, dual plate wafer check valves offer a larger open area. This results in a reduced pressure drop, making them a more efficient option.
Light Weight
Compared to conventional Flanged check valves, our innovative design significantly reduces weight by 80–90%.
Lower Cost
Eliminating flanges and incorporating lightweight and compact profiles in DPW check valves enables their cost-effective manufacturing, particularly for larger pipe diameters. This design approach ensures economical production in comparison to other designs.
Alleviates Water Hammer
Our valves are fitted with spring activated discs that are engineered to provide rapid closure. This results in exceptional performance and eliminates any potential for chattering, while still ensuring a dynamic response with a non-slam design. With these discs in place, you can be confident that our valves will operate seamlessly and efficiently, meeting even the most demanding performance standards.
Simple Installation
Easier to install, remove and replace in both new and existing piping systems.
Variety of Configurations
Valve offers a wide variety of wafer bodies in different styles and materials. These can be assembled with any one of our standard disc, optional spring and elastomer seal choices to make a valve that exactly fits your application. Pins and hardware are always 316SS
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