Plan 53B
Category:Seal Support Systems
Detailed introduction
✅ Reason for adoption
Isolate process liquids.
Zero discharge of process fluids.
Pressure is higher than the 53A scheme.
✅ Application scenarios
Used with pressurized double seals
Liquids with high saturation vapor pressure, light hydrocarbons.
Dangerous or toxic liquids.
Thermal fluid.
Unclean, abrasive, or polymeric liquids.
✅ Preventive maintenance:
The pipeline circuit must be thoroughly vented before starting up.
The accumulator must always be pressurized, typically by means of inflation.
The isolation fluid must be compatible with the process medium.
Regularly monitor the isolation fluid pressure—manually add fluid when the pressure drops.
✅ Typical adaptation scenarios
Primarily used in industrial applications such as medium- and high-pressure process pumps and petrochemical plants, where certain requirements for pressure stability are imposed, and suitable for handling complex media under medium- and high-pressure conditions.
Use parameters
Scheme Description: In this scheme, the external piping system provides pressurized fluid to the outer seal of the double-face sealing device, while a pre-pressurized airbag accumulator supplies the necessary pressure to the circulation system. The internal fluid-circulation loop is responsible for maintaining continuous flow, and heat generated within the circulation system is removed via an air- or water-cooled heat exchanger.
Keywords：Plan 53B
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Plan 23
Core positioning: A single-face seal self-flushing solution specifically designed for hot-water pumps. The medium is guided out of the self-sealing cavity, cooled, and then returned to the sealing face, achieving integrated self-circulation for flushing and cooling without the need for additional medium replenishment.
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Plan 53A
Reason for adoption: Isolate the process fluid. Zero discharge of the process fluid.
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Plan 53B
Reason for adoption: Isolation of process liquids; zero discharge of process fluids; pressure exceeding the 53A scheme.
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Plan 53C
Reason for adoption: Isolate the process fluid. Achieve zero discharge of the process fluid. Pressure exceeds the 53A design specification. Dynamically monitor system pressure.
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