DESCRIPTION
The MPS piston seal is a compact, low friction seal for light to medium duty hydraulic cylinders. It consists of a glass/moly-filled or bronze-filled PTFE ring, pre-loaded by an O-ring to be effective for the pressure range recommended. As the system pressure rises the O-ring deforms and compresses the PTFE ring against the tube wall increasing the sealing force and the effectiveness of the seal. As only the PTFE ring is in contact with the sliding surface, friction is very low and stick-slip is eliminated.
The housing width allows the use of a narrow width piston but it is recommended that an adequate bearing be mounted on either side of the seal. This seal is not recommended for applications where the pressurized cylinder must maintain the load in a set position.
SEAL INFORMATION
Material Type (Primary Seal): 15% GLASS/5% MOLY-FILLED PTFE
Material Type (Primary Seal): 40% BRONZE-FILLED PTFE
Material Type (Energizer): 70A NITRILE
Durometer (Shore D): 63
Temperature Range (F): -22 TO 212
Max Pressure (psi): 5000
Extrusion Gap at Various Pressures (mm):
- 1,500 PSI: 0.60
- 2,400 PSI: 0.50
- 3,750 PSI: 0.45
- 5,000 PSI: 0.35
Max Speed (ft/sec): 12.0
Mating Surface Roughness - Ra (µm) - DYNAMIC: 0.1<>0.4
Mating Surface Roughness - Ra (µm) - STATIC: 1.6 MAX
Part Number Definition (Metric): MPS-(OD)X(PTFE RING WIDTH)X(PTFE CROSS-SECTION)
Additional Part Number Definition (Metric): 100 X 84.5 X 6 RING WIDTH (6.3 GROOVE WIDTH) = MPS-100X6X3.5