Q:Why dual plate check valve have installation distance?

The optimal installation distance for TVCCL dual plate check valves is crucial for ensuring their optimal functionality, efficiency, and longevity. The importance of installation distance lies in its direct impact on valve performance.

1. Flow Stabilization:
After flow disturbances like bends, elbows, or other valves, turbulent flow may develop within the pipe. Turbulent flow can hinder the proper operation of the dual plates. To guarantee smooth valve operation, maintain a specific distance from these disruptions to allow the flow to stabilize and become more laminar.

2. Prevention of Water Hammer:
Water hammer is a sudden increase in pressure that occurs when a fluid in motion is forced to stop or changes direction. If a check valve is located too close to a pump or another valve, it may close quickly when the flow stops, resulting in water hammer. By ensuring a proper installation distance is maintained, the possibility of water hammer can be decreased.

3. Avoiding Cavitation:
Cavitation is the creation and collapse of gas bubbles within a liquid. It can happen if there's a substantial decrease in pressure, for example when fluid speeds up around the plates of a control valve. If the valve is too near to a pump or another origin of flow acceleration, cavitation can happen, leading to impairment. Adequate installation distance can help in cutting down the risk of cavitation.

4. Ensuring Proper Sealing:
For proper sealing of the dual plates, a stable flow profile is necessary. In case the valve is situated too close to any disturbances in the flow, the plates may not seal correctly, resulting in probable leaks.

5. Minimizing Wear and Tear:
Turbulent flow or rapid changes in flow velocity can cause the valve plates to wear and tear more quickly. A consistent flow is achieved by ensuring the valve is installed at the proper distance, which can help reduce wear.

6. Optimal Performance:
For the valve to function optimally, it must operate under the conditions it was designed for. In order to achieve stable flow, minimize the risk of water hammer and reduce wear and tear, the valve's optimal performance is ensured.

7. Safety:
Water hammer and cavitation have the potential to cause damage to both the valve and the piping system, resulting in safety hazards such as pipe bursts and leaks. To mitigate these risks, it is recommended to maintain the specified installation distance.

In summary, the installation distance for dual plate wafer type check valves is crucial to ensure the valve operates correctly whilst maintaining safety and longevity, rather than being a mere recommendation.