BACKUP URETHANE METRIC

9.646" x 10.205" x 0.083" (245.00 mm x 259.20 mm x 2.10 mm)

H&D SKU: MBU-245X7.1X2.1

Product Availability : On Back Order

$10.28

Qty:

DESCRIPTION

Our MBU 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 excellent extrusion resistance.

Our MBU 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 MBU 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 MBU 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

Max Pressure (psi): 10000

Extrusion Gap at Various Pressures (mm):

2,000 PSI: 0.25
4,000 PSI: 0.15
6,000 PSI: 0.10
8,000 PSI: 0.05
10,000 PSI: 0.000 (METAL-TO-METAL CONTACT REQUIRED)

Max Speed (ft/sec): 3.0

Mating Surface Roughness - Ra (µm) - DYNAMIC: 0.1<>0.4

Mating Surface Roughness - Ra (µm) - STATIC: 1.6 MAX

Part Number Definition (Metric): MBU-(ID)X(CS)X(HT)

Additional Part Number Definition (Metric): 70 X 75 X 1.3 = MBU-70X2.5X1.3

Products specifications

ID (Inch)	9.646
OD (Inch)	10.205
Height (Inch)	0.083
ID (Metric)	245.00
OD (Metric)	259.20
Height (Metric)	2.10

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