DESCRIPTION
This Caterpillar-specific metric four piece piston seal profile is a robust design for heavy duty hydraulic applications, and is an excellent choice for sealing Caterpillar and other mobile hydraulic applications that experience shock loads. This profile is a four piece assembly made up of a rubber energizer, PTFE cap and two back-up rings. The cap material is 15% Glass – 5% Moly filled PTFE.
In application, fluid pressure forces the rubber energizer to apply increased load against the PTFE cap and back-up rings. This results in increased sealing force against the bore and allows the back-up rings to close off the extrusion gap between the piston and the bore. Once activated by pressure, the back-up rings protect the seal from extruding and keep internal contamination away from the PTFE cap.
This seal is the same as our MCPS profile, but available in Caterpillar-specific metric sizes.
SEAL INFORMATION
Material Type (Primary Seal): 15% GLASS/5% MOLY-FILLED PTFE
Material Type (Energizer): 70A NITRILE
Material Type (Base): NYLON
Durometer (Shore D): 67
Temperature Range (F): -40 TO 250
Max Pressure (psi): 7500
Extrusion Gap at Various Pressures (mm):
- 2,400 PSI: 1.00
- 3,750 PSI: 0.75
- 6,000 PSI: 0.60
- 7,500 PSI: 0.50
Max Speed (ft/sec): 4.5
Mating Surface Roughness - Ra (µm) - DYNAMIC: 0.1<>0.4
Mating Surface Roughness - Ra (µm) - STATIC: 1.6 MAX
Part Number Definition (Metric): CTC-(CAT PART NUMBER)