ROD BUFFER SEAL INCH

7.500" x 8.116" x 0.235" (190.50 mm x 206.15 mm x 5.97 mm)

H&D SKU: KR-75003

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$109.86

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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: 0.028
3,000 PSI: 0.016
5,800 PSI: 0.010

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)	7.500
OD (Inch)	8.116
Height (Inch)	0.235
ID (Metric)	190.50
OD (Metric)	206.15
Height (Metric)	5.97

Alternate Product Codes

RSS07500/3 (1)

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