After long-term operation of VHP pass chambers, one major concern from production sites is total cycle duration. Especially in the de-residual phase, slow decay of hydrogen peroxide extends running time. Even when sterilization is completed, materials cannot be transferred out immediately, which negatively impacts production throughput.
Residual removal time is related to loading pattern. Meanwhile, equipment design for VHP vapor delivery, internal circulation and residual H₂O₂ treatment is equally critical.
VHP sterilization is a continuous process. H₂O₂ solution is vaporized and delivered into the chamber. VHP diffusion speed depends on air supply and circulation. After exposure, residual vapor must drop rapidly below the release limit. Therefore, VHP equipment should not be judged merely by its vaporization capability.
