TESCO GSM is a two-piece double-acting piston seal consisting of a thermoplastic sealing element with a slot, and an elastomeric ring for the pre-tension.

 

PRODUCT ADVANTAGES

• ​Excellent sealing performance under static and dynamic applications
• Simple groove design
• Easy fit without installation tool
• Superior sealing performance at high and variable pressure levels
• Longer service life due to high abrasion resistance
• Excellent sealing at high surface roughness
• Outstanding resistance to pressure shocks

APPLICATION
Heavy duty cylinders and construction machinery.

 

INSTALLATION
Easy assembly with a piston in one piece. Sealing elements must be pre-assembling system rubbed with oil

NOTES: It is recommended to use with minimum two piston guide rings (DWR/EDWR) in long-stroke cylinders , minimum one guide ring (DWR/EDWR)  in short stroke and under low radial loads

NOTES: the permissible sealing gap values of TESCO GSM  piston  seal is given in the below table.

PERMISSIBLE SEALING GAP   Smax (mm)
B (mm)	800 Bar
4.2	0.35
6.3	0.50
8.1	0.60

Note: The largest sealing gap value occurring on the non-pressurized side of the seal does have a vital importance for the function of the seal and in this respect it is quite important to use the S value lower than the above indicated numbers

MATERIAL: PA / NBR 80 SH

 

OPERATING CONDITIONS
MEDIA	Mineral oils(DIN 51524)	HFA and HFB	HFC
TEMPERATURE	-30°C +105°C	+5°C +60°C	-30°C +60°C
PRESSURE	≤800 Bar	≤800 Bar	≤800 Bar
SPEED	≤1.0 m/sn	≤1.0 m/sn	≤1.0 m/sn

 Note: The above data are maximum values and cannot be used at the same time.

SURFACE ROUGHNESS	Ra	Rmax
Sliding Surface ØD-Ød	≤0.4 μm	≤4 μm
Groove Base ØDb-Ødp	≤1.6 μm	≤6.3 μm
Groove Flanks B	≤3.2 μm	≤16 μm

Note: It is recommended to have 50% to 90% of the working surface material contact area value.

 

 

 

 

 

 

 

 

 

 

 

 

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