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Rotary Seals - Dilanda.it

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Turcon ® Roto Glyd Ring ®<br />

Frictional power<br />

Guide values for the frictional power can be determined<br />

from the graph in Figure 82. They are shown as a function<br />

of the sliding speed and operating pressure for a shaft<br />

diameter of 50 mm w<strong>it</strong>h an oil temperature of 60° C. At<br />

higher temperatures, these application lim<strong>it</strong>s must be<br />

reduced.<br />

Guide values for other shaft diameters can be calculated<br />

using the formula:<br />

P P50 x (<br />

Frictional power P 50<br />

Figure 82<br />

d<br />

50 mm<br />

400<br />

W<br />

300<br />

200<br />

100<br />

0<br />

) [W]<br />

1 m/s<br />

0 10 20 MPa 30<br />

Pressure<br />

0.5 m/s<br />

Frictional power for<br />

Turcon ® Roto Glyd Ring ®<br />

Shaft dia. 50 mm<br />

0.25 m/s<br />

0.15 m/s<br />

The guide values apply for constant operating cond<strong>it</strong>ions.<br />

Changes in operating cond<strong>it</strong>ions such as pressure<br />

fluctuations or alternating directions of shaft rotation can<br />

result in considerably higher friction values.<br />

Application examples<br />

The Turcon ® Roto Glyd Ring ® is the preferably used as a<br />

double acting rotary seal for hydraulic and pneumatic<br />

equipment in sectors such as:<br />

- <strong>Rotary</strong> distributors<br />

- High pressure valve stems<br />

- Manipulators<br />

- Pivoting motors in mobile hydraulic and machine tools<br />

- Hydraulic motors<br />

Application lim<strong>it</strong>s<br />

The maximum application data for temperature, pressure<br />

and speed given in this catalogue have a mutual effect on<br />

one another and can thus not be explo<strong>it</strong>ed simultaneously.<br />

Seal performance is further influenced by such factors as<br />

lubrication capabil<strong>it</strong>y of the sealed medium and heat<br />

dissipation in the hardware, <strong>it</strong> follows that testing should<br />

always be made.<br />

W<strong>it</strong>h good lubrication, the following pv value can be<br />

assumed as guide:<br />

Turcon ® Roto Glyd Ring ® : up to pv = 2.5 MPa · m/s<br />

The value must be reduced for diameters < 50 mm.<br />

Lead-in chamfers<br />

In order to avoid damage during installation, lead-in<br />

chamfers and rounded edges must be provided on the<br />

housing and on the rod (Figures 83 and 84). If this is not<br />

possible for design reasons, a separate installation tool is<br />

recommended.<br />

The minimum length of the lead-in chamfer depends on<br />

the profile size of the seal and can be seen from the<br />

following tables. If concentric<strong>it</strong>y between the parts is not<br />

ensured during installation the lead-in chamfers must be<br />

increased correspondingly.<br />

For the surface qual<strong>it</strong>y of the lead-in chamfer, the same<br />

recommendations apply as given for the sealing surfaces in<br />

Table LIX.<br />

190<br />

Latest information available at www.busakshamban.com<br />

Ed<strong>it</strong>ion April 2006

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