Plan 12 - Single seals - By-pass from discharge with strainer
Description: Plan 12 is similar to Plan 11, except that a strainer or filter is added to the flush line.
Advantages: No product contamination and solids are removed from the flush stream keeping the seal clean.
General: If the seal is setup with a distributed or extended flush, the effectiveness of the system will be improved. This plan should be equipped with a differential pressure indicator or alarm to alert the user that the filter or strainer is clogged.