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piston seal PDDP
型号  
类别   孔用密封
时间   2016-12-12
  1. 详细信息

This hydraulic piston seal ?is a very effective and reliable low frictional seal. It is particularly suitable as a piston seal in both high and low pressure systems. It comprises a PTFE ring and oring, strengthened with additives to resist creep, which is pre-loaded by an O ring to be effective for the operating pressure range recommended. As the 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 movement is eliminated. The geometry of the Glyd Ring ensures a good static sealing and allows the lubricating hydrodynamic oil film to be build under the seal in reciprocating applications.

Characteristics

These are very effective in sealing heavy pressures up to?60Mpa with the least stick/slip and for high surface speeds up to 15m/s in reciprocating application. The temperature range can be -45° C to 200° C depending upon the material used for the energizer 'O' ring. The sealing ring is made of bronze filled PTFE.

Application Range
Pressure [MPa] 60
Temperature [° C] -45...+200
Sliding speed[m/s] 15
Medium: Mineral oil based hydraulic fluids, barely flammable hydraulic fluids, water, air and others.

Material
?O ring NBR / FKM (Special on request) ?
Slide ring: PTFE-Bronze / PTFE-carbon
(Special on request)

Application????
valve stem
machine tools
mini hydraulic

2012-08-29_172008