I am looking for some advice regarding the installation of an API Plan 53A system. We have a vertical mounted in-line mixer operating at 3 bar. The mixer is blending food flavouring and colourant into a fat and sugar slurry. The original single seals with an atmospheric static oil quench, continually failed due to a build up of sugar on the seal faces. Our supplier is planning to fit Fluiten C2D double mechanical seals with a plan 53A reservoir. The supplier recommends that normal oil level in the reservoir tank is 1 metre above the seal. The problem is, there is limited headroom where the mixers are installed, and the maximum oil level that we can achieve is 60 – 70cm above the seal. What effect is the lower oil level likely to have on the performance of the seals?
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