GST is the DEF Seal Solutions proprietary design of hydraulic wear Ring or guide ring. The function of a hydraulic wear ring is to guide the shaft and hole sealing of a hydraulic Cylinder, absorbing transverse forces. At the same time, it previents metal-to-metal contact, optimizing the performance of the sealing system. 
1. Good dimensional stability, can absorb stock
2. Uniform distribution of the large radial force
3. Low coefficient of friction, good sliding performance
4. Higher load bearing capacity
5. Excellent wear resistance
6. Wipe effect
7. Easy to install
8. Long service life
Technical Data
Pressure Pr: N/mm² (Max)
100@ 25° C
50>60°C
Temperature [° C]*: -60^+120
Sliding speed[m/s]: 1
Medium: Mineral oil based hydraulic fluids, barely flammable hydraulic fluids, water, air and others. 
-Material
Phenolic Resin with Fabric Reinforcement (HG)
-Type of cut
The Angle Cut is the most frequently used standard type of cut. Rings with Other types of cut, like Straight Cut and Step Cut are available on request. 
-Design Type
DEF guide rings(GST) has a rectangular cross-section with rounded or chamfered edges, thus preventing impermissible edge force in the corner radius of the grooves. The chamfers also serve to facilitate installation, e. G. When inserting into the cylindrical tube or guide bush. 
The ring ends are finished as standard with an angle cut. 
Strip material is available in rolls or precut to size to fit with the gap necessary