Search
Filters

ROD BUFFER SEAL INCH

11.000" x 11.830" x 0.305" (279.40 mm x 300.48 mm x 7.75 mm)
H&D SKU: KR-110004
Product Availability : On Back Order
$375.00

DESCRIPTION

The KR profile is a rod seal that can be used as a buffer seal in conjunction with other primary rod seals or in tandem with itself, creating a zero leak seal. The KR is a uni-directional seal, with a unique design that allows the seal to relieve pressure build up. This pressure relief feature allows the KR to be used in a tandem or multiple seal arrangement. 

The KR features low friction, long life, and versatility. When the rod is going through its power stroke (higher pressure) the seal is riding on a sealing point, creating a high compression point and limiting leakage. As the rod goes to its return stroke, it rocks forward, creating a larger sealing surface on the rod. The compression force is spread out over a larger area, reducing the load on the rod. This allows any trapped fluid to easily return to the system. 

For high temperature applications, the KR-V seal can be used. Temperature rating is -20 to 400F and uses a Fluorocarbon energizer in place of standard Nitrile 

 

SEAL INFORMATION

Material Type (Primary Seal): 40% BRONZE-FILLED PTFE 

Material Type (Energizer): 70A NITRILE 

Material Type (Energizer): 75A FLUOROCARBON 

Durometer (Shore D): 63 

Temperature Range (F) NITRILE: -40 TO 220 

Temperature Range (F) FLUOROCARBON: -20 TO 400 

Extrusion Gap at Various Pressures (in):

  • 1,500 PSI: 0.039
  • 3,000 PSI: 0.031
  • 5,800 PSI: 0.020

Extrusion Gap WITH WEAR RINGS at Various Pressures (in):

  • NOTE: THE GAPS STATED APPLY WHEN THE SEAL IS SPECIFIED WITH WEAR RINGS. WHEN NOT USING WEAR RINGS, THE EXTRUSION GAP SHOULD BE REDUCED.

Max Speed (ft/sec): 13.0 

Mating Surface Roughness - Ra (µin) - DYNAMIC: 4<>12 

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

Part Number Definition (Inch): KR-(ROD DIAMETER)(O-RING SERIES) - ADD -V FOR FLUOROCARBON ENERGIZER 

Products specifications
ID (Inch) 11.000
OD (Inch) 11.830
Height (Inch) 0.305
ID (Metric) 279.40
OD (Metric) 300.48
Height (Metric) 7.75