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Unilite® Technical Data
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THE
ECONOMICAL, LONG LASTING UNILITE® FROM UTEX
The Unilite® is a unique non-metallic
mechanical seal that delivers economy and durability all in a proven
design. A metal collar insert protects the composite material when the
set screws are tightened, making this a uniquely rugged design for the
field. And because it uses no setting clips, this full cartridge seal is
simpler to install than previous mechanical seals. Its features include:
- The economy of a non-metallic seal
- Proven polyphenylene sulfide non-metallic
composite
- High chemical resistance
- Available with flush on request
- No setting clips required
- Factory repairable
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| Part |
Materials |
| Base
Material |
Polyphenylene
Sulfide Composite |
| Spring |
Hastelloy C-276 |
| Stationary Seal Face |
Standard - CNFJ-B grade
carbon.
Available - Tungsten carbide and silicon carbide. |
| Rotating Seal Face |
Alpha sintered silicon
carbide. |
| O-Rings |
Standard -
Viton
Available - EPDM, Neoprene, Nitrile, Chemtex, Aflas, Chemraz, and Kalrez. |
| Parameter |
Operating
Range |
| Temperature |
+212°F
(+100°C) |
|
Pressure |
200
psi (13.8 bar) |
| Speed |
2950
fpm (15 m/s) |
Unilite® Features and Benefits
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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.
Viton 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, heavier viscous materials,
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.
Molded polyphenylene sulfide non-metallic composite. |
8.
Economy price, high chemical resistance, no metallic parts in contact
with the pumped product, high strength of composite material. |
More Technical
Information About the Unilite®
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TYPICAL MECHANICAL PROPERTIES OF UNILITE®
COMPOSITE SEAL
POLYPHENYLENE SULFIDE COMPOSITE |
| Tensile strength |
ASTM D638 |
22,000 psi |
155 MPa |
| Ultimate elongation |
ASTM D638 |
1% |
1% |
| Flexural strength |
ASTM D790 |
36,000 psi |
248 MPa |
| Flexural modulus |
ASTM D790 |
2,000,000 psi |
14 GPa |
| Notched IZOD |
ASTM D256 |
4 ft-lb/ in |
212 J/ M |
| HDT @ 264 psi (1.82 MPa) |
ASTM D648 |
500° F |
260° C |
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Available Unilite®
Cartridge Seals
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