BACKUP URETHANE INCH

10.500" x 11.000" x 0.105" (266.70 mm x 279.40 mm x 2.67 mm)

H&D SKU: 8-450U

Product Availability : In Stock

$20.83

Qty:

DESCRIPTION

Our 8-U backup rings help prevent extrusion in high pressure service and compensate for loose fitting parts. These backup rings are molded from a tough abrasion-resistant 95-duromenter Polyurethane and provide much improved extrusion resistance over our 8-N Nitrile backup rings.

Our 8-U backup rings are generally usable through a temperature range of -65 to 220 and is not intended for use with water-based fluids.

In double-acting seal assemblies, an 8-U backup is required on both sides of the o-ring. It is cheap insurance to use two even in single acting installations. At assembly, it is too easy to place a single 8-U backup on the wrong side of the o-ring. By specifying one on each side of the o-ring, there be one on the low pressure side, where it is needed, and the extra 8-U backup does no harm.

SEAL INFORMATION

Durometer (Shore A): 95

Temperature Range (F): -65 TO 220

Extrusion Gap at Various Pressures (in):

2,000 PSI: 0.010
4,000 PSI: 0.006
6,000 PSI: 0.004
8,000 PSI: 0.002
10,000 PSI: 0.000 (METAL-TO-METAL CONTACT REQUIRED)

Max Speed (ft/sec): 3.0

Mating Surface Roughness - Ra (µin) - DYNAMIC: 4<>16

Mating Surface Roughness - Ra (µin) - STATIC: 63 MAX

Part Number Definition (Inch): 8-(AS568 3-DIGIT NUMBER)U

Additional Part Number Definition (Inch): 2"ID X 1/8" NOMINAL CS = 8-226U

Products specifications

ID (Inch)	10.500
OD (Inch)	11.000
Height (Inch)	0.105
ID (Metric)	266.70
OD (Metric)	279.40
Height (Metric)	2.67

Alternate Product Codes

575-450 (1)
,
575450 (1)

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