U-CUP PISTON INCH

DESCRIPTION

The P-4 u-cup is a specialized piston seal design, developed from the standard symmetrical u-cup. It assures improved sealing performance due an interference fit in the groove that prevents movement of the seal during cylinder operation. With an improved lip design, the dynamic sealing lip has a heavier cross-section for improved high pressure capability. 

SEAL INFORMATION

Durometer (Shore A): 92 

Temperature Range (F): -40 TO 195 

Extrusion Gap at Various Pressures (in):

• 1,500 PSI: 0.024
• 3,000 PSI: 0.012
• 5,000 PSI: 0.006

Max Speed (ft/sec): 3.0 

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

Mating Surface Roughness - Ra (µin) - STATIC: 32 MAX 

Part Number Definition (Inch): UH-(CS)(ID)(HT)P-4 

Additional Part Number Definition (Inch): 2 X 2-1/2 X 3/8 = UH-25002000375P-4