API PLAN 53B

The Installation of a barrier fluid in accordance with the API 682 specification, Plan 53B. It is an external system of the barrier fluid, which is under a higher pressure than the pressure in the stuffing box (sealing chamber).

The circulation of the barrier liquid is forced by an internal device of a seal. The pressure of the barrier fluid is kept by a diaphragm accumulator tank. Use of the accumulator tank prevents of gas absorption by the barrier liquid and enables the operation of the system at high pressure.

The system is monitored by a decrease of the pressure of the barrier liquid, caused by leakage of the barrier liquid through internal and external seals. The pressure decrease is corrected by refilling of the barrier liquid.

1. Barrier liquid tank with cooler
2. Diaphragm accumulator tank
3. Pressure indicator
4. Pressure gauge
5. Temperature gauge
6. Hand pump
LBO – Barrier liquid outlet
LBI – Barrier liquid inlet
F – Flushing