Ball Check Valve or Plate Check Valve for A Sewage Lifting Device?
When selecting a check valve for a sewage lifting device, should you choose a plate check valve or a ball check valve? Let’s explore the characteristics, advantages, and disadvantages of these two types of check valves.
Functions of check valves.
First, check valves have three main functions:
- Prevent sewage from flowing back into the collection tank after pumping, improving drainage efficiency.
- Prevent outdoor floodwater from flowing back into indoor spaces.
- Prevent the motor from reversing due to backflowing sewage, protecting the water pump motor.
Characteristics of plate check valves.
The plate check valve has a simple structure, low manufacturing cost, and relatively affordable prices, making them suitable for most sewage discharge applications. Their flap features a built-in iron core covered with rubber, achieving a seal by pressing the rubber-covered flap against the base.
Advantages:
- Simple structure and low manufacturing cost.
- Built-in iron core with rubber coating on the flap ensures good sealing performance.
Disadvantages:
- Fixed sealing surfaces are prone to damage.
- Foreign matter remaining on the sealing surface is difficult to remove, affecting sealing performance.
- Repeated impacts on the sealing plate can cause damage.
- Prone to water hammer effects, reducing the service life of the valve plate.
Characteristics of ball check valves.
A ball check valve has a large flow capacity, low fluid resistance, a wide opening channel, and strong foreign matter passage capability. The ball cleans the channel and sealing surface as it tumbles.
Advantages:
- Large flow capacity and low fluid resistance.
- Wide opening channel with strong foreign matter passage capability.
- The tumbling ball cleans the channel and sealing surface.
- Smooth closing process protects the sealing surface and minimizes water hammer effects.
- No wear on rotating parts; the automatically rotating ball core protects the sealing surface.
- Uniform wear on the spherical surface does not affect sealing performance, ensuring long service life.
- Hollow iron ball with rubber coating provides good vibration absorption and damping.
- Linear sealing on the sealing surface ensures high sealing pressure and better sealing performance.
Disadvantages:
- Higher manufacturing cost and higher price.
Conclusion
For sewage sewage lifting device, ball check valves are undoubtedly the better choice. They not only ensure high efficiency and reliability during sewage pumping but also effectively prevent water hammer effects and extend service life. Although the manufacturing cost is higher, the investment is worthwhile considering their superior performance and reliability.
Choosing the right check valve will make your lifting device more efficient and reliable!
