The diffuser (impeller cover) for the ESPA Silen 150 pump is a hydraulic component specific to the 1.5 HP performance class, differing from the diffuser for the 100 model in its flow geometry.
The precise shape of the inner channel of the diffuser determines the pressure characteristic of the pump and its ability to overcome the hydraulic resistance of the filtration system.
Cracks or erosive damage to the inner wall of the diffuser cause increased noise, vibration and a loss of discharge pressure.
Replacement is straightforward from a service point of view – after removing the front body of the pump, the diffuser is released from the pump body and replaced with a new part.
The original ESPA part for the Silen 150 guarantees the precise flow geometry for restoring full performance without further adjustment.
