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Products
API Plan 31
API Plan 31
Recirculation from the pump discharge through a cyclone separator delivering the clean fluid to the seal chamber. The solids are delivered to the pump suction line.
A Cyclone separator
B Contaminated liquid IN
C Clean liquid OUT
D Separated liquid OUT
Seal chamber details
1 From clean discharge connection of cyclone separator
2 Flush (F)
3 Quench (Q)
4 Drain (D)
5 Seal chamber
Example seal: EagleBurgmann SH single pusher mechanical seal.
P&ID according to API
Features
- Plan 31 is a variant of Plan 11 (Plan 11 + cyclone separator).
- The cyclone separator removes solids and prevents all but a few minor particles from reaching the seal chamber.
- The media properties retained as solids are routed back to pump suction.
Application
- Horizontal pumps conveying media like water with sand particles.
- Horizontal pumps conveying media with heavy suspended solids.
Remarks, checkpoints
- Specific gravity of the solids should be at least twice that of the pumped media. In other cases Plan 32 is recommended.
- The installation of the pump throat bushing must be ensured.
- Do not use for extremely contaminated media. Plan 32 is recommended in such cases.
- Can lead to reduced reliability due to abrasive wear inside the cyclone.
- Routine inspection of the cyclone for abrasive wear is recommended.
Pump media characteristics
- Suspended fluids
Location, function
- Process side
- Flushing and cooling
Configurations
1CW-FL, 1CW-FX, 2CW-CW, 2CW-CS, 3CW-FB, 3CW-BB, 3CW-FF
3NC-FB*, 3NC-BB*, 3NC-FF*
* Remark: The configurations listed for each individual piping plan are to be understood as recommendations including possible utilizations which may also be applied.
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The Eagleburgmann Group
Sealing technology for plants and machines
EagleBurgmann is one of the worldwide leading providers of industrial sealing technology. Mechanical seals, seal supply systems, magnetic couplings, carbon floating ring seals, expansion joints, gaskets and packings as well as comprehensive services are used wherever reliability and safety are needed.
Mechanical seals and more
Sealing technology by EagleBurgmann is used worldwide in oil and gas industries, refineries, the petrochemical, chemical, and pharmaceutical industries, food processing, energy, water, mining, paper, aerospace, and other industries. Close to 5,800 employees provide their ideas, solutions, and commitment so that customers can rely on our sealing technology.
What makes us stand out is our excellent quality, great innovative capacity, and an extensive product portfolio for nearly all industrial processes and fields of application. Our product portfolio includes everything from mechanical seals and seal supply systems to magnetic couplings, carbon floating ring seals, expansion joints, and gaskets and packings as well as comprehensive services. Since we are part of the German Freudenberg and Japanese EKK group, we have all the necessary resources for a firmly based reliable partnership.