 The Liberator I ® cartridge seal incorporates advanced seal design features. Using a "ball" drive, the liberator resists twisting and torsional strains common to pin or key drives. The thin cross section allows the Liberator I ® to be used in ANSI pumps without modification. It employs a multi-crested wave spring which is a non-clogging spring isolated from the product for optimum corrosion resistance. The rotating seat and spring-loaded stationary accept higher shaft speeds, heavier viscosity fluids, and greater misalignment. The liberator gland incorporates both vent and drain connections, and provides two tangential flush ports for any desired pump rotation.
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 The Liberator II ® cartridge seal offers all of the design features of the Liberator I ®. In addition, it features two tangential outlet ports for clockwise or counterclockwise pump rotation. A pumping ring built in as a standard feature provides positive barrier fluid circulation. The Liberator II ® is a double, hydraulically balanced seal which allows it to be used as a double or tandem seal. In vertical installations, the secondary seal chamber is self-venting to ensure proper lubrication of the secondary sealing surfaces. The barrier fluid at the secondary seal is on the OD of the sealing faces, which ensures maximum heat dissipation.
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 The compact and versatile MB-I ® can be used as either a stationary or rotating bellows seal. The bellows design provides even distribution of load around the entire circumference of the seal face. The need for dynamic o-rings is eliminated reducing frictional drag and wear. The unique and multi-ported flushing system of MB-I ® uses a single gland connection that enters into the annular cavity. The flush medium flows around this cavity and exits through evenly spaced port, traveling axially over the seal faces. This provides full 360-degree lubrication and cooling while protecting the faces from abrasive particles.
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 The unique MB-II ® can be operated as either a double or a tandem seal, both of which are hydraulically balanced, making it one of the most versatile seals available. It is designed and built to reduce emissions to EPA standards and to increase mean time between planned maintenance (MTBPM). The dual stationary bellows assembly self-adjusts for misalignment and reduces harmonic vibration. The buffer fluid is sealed on the OD of the outboard bellows. This prevents heat-related problems resulting from air entrapment and dead fluid zones. Also, higher buffer fluid pressures are attainable. A radial flow pumping ring produces a high performance flow of buffer fluid for efficient cooling and helps prevent abrasive wear.
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 The UTEX "MB" ® metal bellows seal provides unitized construction with superior nestled ripple bellows design. It is designed for applications involving more viscous fluids, such as mud pumps, compressor gas seals, and crude oil handling. The static o-ring seal eliminates shaft or sleeve fretting. The welded bellows core provides 360-degree face loading to reduce vibration and frictional heat. The integrally balanced seal handles pressure from vacuum to 300 psi.
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Complete cartridge seal is manufactured from high temperature materials in order to withstand high temperature without the need for heat exchangers or outside cooling in most cases.
- Static Grafoil ® packing – no fretting or hang-up, no o-rings to cook
- Hydraulically balanced – capable of handling higher pressures with less heat generation
- Self-cleaning – rotating bellows creates centrifugal force to expel abrasives
- Tungsten carbide-inserted bellows run against a silicon carbide stationary for long lasting face life and heat resistance
- Can handle temperature as high as 800 F and pressures of up to 300 psig while operating
- Easy cartridge installation to reduce down time
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The Eagle CS300 compact cartridge seal incorporates a highly reliable, edge-welded bellows flexible element, of a design that has been field-proven for more than 20 years. The bellows seals construction provides significant benefits leading to exceptional sealing performance and extended seal life.
- No dynamic o-rings or other sliding parts to "hang up"
- Self-cleaning, non-clogging construction
- Pressure-balanced for low power consumption and low face wear
- Easy to install, no setting clips to remove
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- For general sealing purpose application
- Machined gland
- Balanced design
- Single flush connection
- Springs isolated from product to eliminate clogging
- Slotted gland to accommodate multiple bolt circle diameters
- Easy pull setting strip to center seal before tightened to shaft makes for quick installation
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Kalrez ® is a Registered Trademark of DuPont Dow Elastomers, L.L.C.
Grafoil ® is a Registered Trademark of UCAR Carbon Company.
Chemraz ® is a Registered Trademark of Green, Tweed and Co.
Liberator I ®, Liberator II ®, MB I ®, MB II ®, and MB ® are all registered trademarks of UTEX Industries.
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