Seal Flushing Plan 54

Seal Flushing Plan 54 A forced seal circulation unit plan 54 (The Flo-Pac range of FCU units) is a-pressurised piping system with an external reservoir that contains a clean barrier fluid. The barrier fluid is re-circulated by an external forced circulation pump. It is typically used with pressurised dual (double) seals at a pressure greater than the box pressure. The barrier fluid provides cooling and lubrication for the inner and outer seal. The higher barrier liquid pressure results in barrier liquid leakage over the seal faces into the process, thus fully containing the product. Heat is removed by an external heat exchanger. This system type is typically applied for the more demanding and critical services that require a high level of integrity and operational reliability. For process lines with multiple pumps in similar duty this system type may also be considered a cost effective (single system) alternative, compared to the multiple plan 53 units required otherwise. Flo-Pac 53A units are well suited for their application, yet for most pressurised sealing configurations would rather recommend the use of a plan 53B.