UTEX Industries, Inc.

UTEX Industries, Inc. Liberator® II Mechanical Seal

Liberator® II Mechanical Seal

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Features and Benefits
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Liberator® II Technical Data

The Liberator® II cartridge seal (patented) incorporates all of the design features of the Liberator® I. In addition, it features two tangential outlet ports for clockwise or counterclockwise rotations. 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 insure proper lubrication of the secondary seal faces. The barrier fluid at the secondary seal is on the O.D. of the sealing faces, which insures maximum heat dissipation.

Part Materials
Metal Parts Standard - 316 SS metal parts. 
Stationary Seal Face Standard - CNFJ-B grade carbon. 
Available - Tungsten carbide and silicon carbide.
Rotating Seal Face Alpha sintered silicon carbide. 
O-Rings Standard - Aflas 
Available - EPDM, Neoprene, Nitrile, Chemtex, Chemraz, Kalrez, and Viton.
Parameter Operating Range
Temperature -60°F to +400°F (-50°C to +204°C) 
Pressure

400 psi (27 bar)

Speed 5000 fpm (25 m/s)

 

Liberator® II Features and Benefits

Features

Benefits

1.Carbon/silicon carbide used as standard face materials. 1. Highest PV rating available; less friction and heat result in longer seal life.
2. Aflas as standard O-rings. 2. Broader range of applications.
3. Multi-crested wave spring. 3. Even face loading, non-clogging, fewer parts.
4.Wave spring is isolated from the product. 4. Enhances corrosion resistance.
5. Uses a rotating seat and a spring loaded stationary. 5. Lower emissions in ppm, higher shaft speeds, can be used in heavier viscous fluids, self-aligning.
6. Thin cross-section design. 6. Fits most ANSI size pumps without modification.
7. Three stainless steel balls are equally spaced to provide the connection between the spring loaded stationary and the seat gland. 7. Prevents twisting and torsional strains common to drive pins and keys; provides optimum flexibility and accurate centering of the stationary.
8. Liberator® II has a pumping ring with special cut-water design as standard; provides forced circulation of barrier/buffer fluid. 8. Greater heat dissipation from outboard seal chamber as opposed to thermal convection methods; keeps particles in suspension.
9. Liberator® II glands incorporate two tangential outlet ports for clockwise  or counterclockwise pump rotation. 9. Maintains pumping ring efficiency regardless of pump rotation direction.
10. Liberator® II uses a double hydraulic balance design. 10. Can be used as either a dual pressurized or non-pressurized seal.
11. Liberator® II has an outboard seal with barrier/buffer fluid on the O.D. of the seal; entire outboard seal operates inside the outboard seal gland. 11. Better heat dissipation, lubrication, and utilization of maximum seal operating pressure.

More Technical Information About the Liberator® II 

Schematics, assorted tables, manufacturing tolerances that can change depending on the seal.

   


Shaft Size Stuffing Box Bore Seal O.D. Stuffing Box Depth In-board Length Outboard Length Gland Width Gland O.D. Slot Width Bolt Circle Minimum By Bolt Size
INCH/MM MIN MAX MIN 3/8 1/2 5/8 3/4
A B C D E F G H J K

Convert to Metric

Available Liberator® II  Dual Cartridge Seals

Shaft Size (Standard) Shaft Size (Metric) Select Materials
(Inboard Faces, Elastomer)
Standard Outboard Faces PDN Number

Carbon /
Silicon Carbide (Alpha)

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