U-CUP ROD INCH

DESCRIPTION

The RB-621 is the Hallite 621 and is a top of the range high pressure rod seal.  The design of the seal incorporates a unique profiled NBR energizer to ensure complete lip actuation under all pressure conditions and to cushion the seal against shock loadings.  This seal also incorporates a polyacetal anti-extrusion ring. 

The shell is molded in Hallite’s high performance polyurethane Hythane 181, ensuring flexibility for installation and performance at low temperatures.  This seal also benefits from Hallite's twin lip profile for dry rod sealing. 

SEAL INFORMATION

Material Type (Primary Seal): POLYURETHANE 

Material Type (Energizer): 70A NITRILE 

Material Type (Backup Rings): POLYACETAL 

Durometer (Shore A): 93 

Temperature Range (F): -50 TO 230 

Max Pressure (psi): 10000 

Extrusion Gap at Various Pressures (in):

• 2,400 PSI: 0.040
• 3,750 PSI: 0.032
• 6,000 PSI: 0.024
• 7,500 PSI: 0.016
• 10,000 PSI: 0.010

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): UH-(CS)(ID)(HT)RB-621 

Additional Part Number Definition (Inch): 2 X 2-1/2 X 3/8 = UH-25002000375RB-621