Hydraulic Seals - Trelleborg Sealing Solutions

Slydring ® has a tightly controlled thickness to maximize its
load carrying capability and extend the life of the seals.
A precision wall thickness tolerance of .002“ is achieved on
our standard product in this catalog. Our HiMod ® Slydring ®
HM803 and HM852 are available with ultra-tight tolerance
wall thickness of 0.124- 0.125 inches and loose tolerance of
0.122 - 0.125 inches. Wall thicknesses and sizes not
mentioned in this catalog are available. Contact you local
Trelleborg Sealing Solutions sales office for further
information.
Table IV Surface Roughness
Table III Radial Clearance
Bore Diameter min. max.
.20 - .79 .20 .30
.80 - 3.99 .25 .40
4.00 - 9.99 .30 .60
10.00 - 19.99 .40 .80
20.00 - 39.99 .50 1.10
>40.00 .60 1.20
Parameter Mating surface Groove Surface
Turcite ® Materials Zurcon ® Materials HiMod ® Materials Orkot ® Materials
Rmax. .63 - 4.00 1.00 - 4.00 1.00 - 4.00 1.00 - 4.0 < 16.0
RZ DIN .40 - 2.50 .63 - 2.50 .63 - 2.50 .63 - 2.50 < 10.0
Ra .005 - .40 .10 - .40 .10 - .40 .10 - .40 < 2.50
Slydring ® also allows foreign particles to be wiped away
rather than being squeezed between the metal
components. The slot ’Z1’ allows fluid to pass across the
ring thus preventing fluid pressure buildup which might
cause extrusion of the guide ring. To ensure the ring
cannot escape out of the groove it is recommended to
observe the following radial gap sizes as maximum:
- .020 for .060 thickness
- .035 for .125 thickness
6
Important Note:
The above stated limits for pressure and speed are
maximum values individually. Friction heat
generated by the combination of pressure and
speed may cause local heat buildup. Care should
be taken not to apply high values for pressure and
speed at the same time.
Slydring ® - Wear Ring
Latest information available at www.tss.trelleborg.com
Edition February 2008