Flexaseal MP5200 Mechanical Seal Support System
Flexaseal MP5200 Mechanical Seal Support System (API Plan 52/53A)
Listing Summary
Available for sale is a Flexaseal MP5200 Series Mechanical Seal Support System. Manufactured in 2021 in Houston, Texas, this unit is designed to meet API 682 standards for Plan 52 (unpressurized buffer fluid) or Plan 53A (pressurized barrier fluid) dual mechanical seal arrangements.
The system includes the primary seal pot/reservoir, integrated cooling coil, armored level gauge, pressure gauge, and Rosemount/Emerson instrumentation (pressure and level transmitters). It is in excellent, like-new condition, having been stored indoors. This is a critical reliability component for any process plant running dual mechanical seals on hazardous, toxic, or high-value fluid pumps.
Key Specifications
| Specification | Detail |
| System Type | Barrier/Buffer Fluid Reservoir (Seal Pot) |
| API 682 Compliance | Plan 52 (Buffer) or Plan 53A (Barrier) |
| Maximum Allowable Working Pressure (MAWP) | 285 PSIG at 100°F |
| Minimum Design Metal Temperature (MDMT) | -20°F at 285 PSIG |
| Hydrotest Pressure | 428 PSIG |
| CRN Number | 0H05497.6 (Canadian Registration Number) |
| Instrumentation Included | Rosemount Pressure Transmitter, Level Transmitter, Analog Pressure Gauge, Armored Sight Glass |
| Cooling | Integrated internal cooling coil |
| Valving | Stainless steel isolation and drain ball valves included |
Typical Applications
The Flexaseal MP5200 system is used to support dual mechanical seals (tandem or double arrangements) on centrifugal pumps. Typical applications include:
•API Plan 52 (Unpressurized): Circulates a liquid buffer fluid between the inner and outer seals. Used for flashing fluids, light hydrocarbons, and toxic chemicals where zero atmospheric leakage is required.
•API Plan 53A (Pressurized): Circulates a pressurized liquid barrier fluid between the inner and outer seals. Used for dirty, abrasive, or highly toxic fluids where the process fluid must be completely isolated from the seal faces.
Common industries include oil refineries, chemical plants, pipeline terminals, and water/wastewater treatment facilities.