Seal Support Systems and API Plans
Engineered Flush, Barrier and Buffer Solutions for Mechanical Seals
Seal Support SystemsMechanical seals depend on the correct operating environment to survive. AVT Sealing Solutions supplies AESSEAL® seal support systems and API plans, helping facilities across Illinois, Indiana, and Wisconsin extend seal life and prevent costly failures. |
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Seal Support Systems
Seal support systems control temperature, pressure, and lubrication
when process conditions are not ideal.
What a Mechanical Seal Needs to Survive
To achieve maximum service life, the environment around the seal faces must be controlled.
Clean FluidContamination leads to wear, scoring, and premature failure. |
Relatively CoolExcess heat reduces lubrication and accelerates wear. |
Stable Fluid FilmProper film formation prevents face contact and damage. |
Good LubricityLubricating properties are critical to prevent face distress. |
When the Environment Must Be ControlledCertain fluids are not naturally conducive to long seal life:
In these cases, API seal support plans are used to modify and stabilize the seal environment. |
Buffer and Barrier Media
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API Seal Support Plans
The following API plans are commonly applied to control seal chamber temperature,
pressure, contamination, and lubrication. Proper plan selection directly impacts seal life and reliability.
Plan 02 Dead-ended seal chamber. Use: Cool, clean fluids in low-speed pumps. Requires jacket for cylindrical chambers. |
Plan 11 Recirculation from discharge through orifice. Use: Clean, non-polymerizing fluids. Calculate orifice size. Not for solids. |
Plan 13 Recirculation from seal chamber to suction. Use: Vertical pumps or low ΔP. Verify pressure differential. |
Plan 21 Discharge recirculation through cooler. Use: Hot non-polymerizing fluids. Cooler must follow orifice. |
Plan 23 Seal chamber recirculation through exchanger. Use: Hot clean services. Strict piping orientation required. |
Plan 32 External flush injected into chamber. Use: Dirty or high-temp fluids. Flush must be reliable & compatible. |
Plan 41 Cyclone separator + cooler recirculation. Use: Hot services with solids. Cooler maintenance required. |
Plan 52 Unpressurized buffer system (double seal). Use: No contamination allowed. Never run low on buffer fluid. |
Plan 53A Pressurized barrier fluid system. Use: Hazardous or toxic fluids. Maintain pressure above process. |
Not sure which solution is right?Share your operating conditions and equipment details. We’ll help you select the right mechanical seal, seal support system, bearing protection, or packing for your application. |
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Not sure which solution is right?
Share your operating conditions and equipment details. We’ll help you select the right solution.
Explore Our Product Range
A comprehensive range of sealing, lubrication, and asset protection products to support rotating equipment and piping systems.
Explore Our Product Range
A comprehensive range of sealing, lubrication, and asset protection products to support rotating equipment and piping systems.
Gas Seals
Cartridge Seals
Bearing Protection
Component Seals
Seal Support Systems
Packing
Gaskets
Industrial Lubricants
Expansion Joints
O-Rings
