Use a pressure relief valve to extend the life of the condensate pump
The proper way to set the drive pressure for a mechanical pump is typically to ensure it is slightly higher than the back pressure—usually between 1 to 1.5 kg/cm² (15 to 20 psig). This is generally effective in most situations. However, there are cases where you may need to increase the drive pressure just a bit more in order to achieve the desired pump displacement. While this can help with performance, increasing the drive pressure beyond what's necessary can lead to issues, especially with the intake valve.
When the drive pressure is too high, it can cause excessive wear on the intake valve. Over time, this can result in premature failure and the need for replacement, which increases maintenance costs and downtime. Therefore, it's important to carefully balance the drive pressure to meet the pump’s requirements without overloading its components.
To avoid this problem, it's advisable to use a pressure-reducing valve or a dedicated pressure-reducing station. These devices allow you to maintain an optimal drive pressure that supports efficient pump operation while protecting the intake valve from unnecessary stress. Additionally, in applications where space is limited, a steam pipe-equipped relief valve can be a good option.
During operation, the manifold supplies the pump with a steady flow, acting as a buffer that helps stabilize the system. This buffer effect not only improves the overall performance of the pump but also reduces wear on the pressure-reducing valve, extending its lifespan and improving system reliability. By implementing these best practices, you can ensure smooth and efficient pump operation while minimizing maintenance needs.
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