BFS 53B

Circulation in accordance with API 682 / ISO 21049: Plan 53B
Pressurised barrier system (closed circuit) is employed for applications in sealing systems with operating parameters of high pressures and/or for hazardous/environmentally harmful processes. The BFS (Plan 53B) range is available with a pressure accumulator, cooler (finned tube or water or air cooler with fan) with a wide range of instruments.

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Design construction available with finned tube, water or air coolers with fan
Barrier pressure is created without any need for connection to a nitrogen supply
Modular design combination available with a wide variety of system components and instruments selection possible
Pressurisation is achieved through a pre-loaded bladder accumulator
Nitrogen cannot get into the barrier medium or process medium, because it is separated from the barrier medium by membranes in the accumulator

The BFS is designed to perform the following functions of a barrier system:
To pressurize the barrier chamber
Leakage compensation
To cool the seal
Pressurization (> process pressure) prevents the process medium from getting into the barrier circuit or the atmosphere. Pressurization is supplied by a pressure accumulator which is pre-loaded with nitrogen. Circulation in the barrier circuit takes place by the thermosiphon principle or by forced circulation, e.g. with a pumping screw.

Operating and installation diagram for a BFS (Plan 53B).
- A. From mechanical seal
- B. To mechanical seal
- C. Fill
- F. Drain
- G. Vent
- H. N2 Precharge

PED 2014/68/EU (Design and production in accordance with EU Pressure Equipment Directive)
ASME VIII, Div. 1 (Design, calculation and production)

Design construction available with finned tube, water or air coolers with fan
Barrier pressure is created without any need for connection to a nitrogen supply
Modular design combination available with a wide variety of system components and instruments selection possible
Pressurisation is achieved through a pre-loaded bladder accumulator
Nitrogen cannot get into the barrier medium or process medium, because it is separated from the barrier medium by membranes in the accumulator

The BFS is designed to perform the following functions of a barrier system:
To pressurize the barrier chamber
Leakage compensation
To cool the seal
Pressurization (> process pressure) prevents the process medium from getting into the barrier circuit or the atmosphere. Pressurization is supplied by a pressure accumulator which is pre-loaded with nitrogen. Circulation in the barrier circuit takes place by the thermosiphon principle or by forced circulation, e.g. with a pumping screw.

Operating and installation diagram for a BFS (Plan 53B).
- A. From mechanical seal
- B. To mechanical seal
- C. Fill
- F. Drain
- G. Vent
- H. N2 Precharge

PED 2014/68/EU (Design and production in accordance with EU Pressure Equipment Directive)
ASME VIII, Div. 1 (Design, calculation and production)