DanaRoto S pressure relieved R41

DanaRoto is a PTFE-based sealing system. It consists of a PTFE sealing ring, thanks to which there is a low level of friction on and wear of the rotating surface, and an elastomeric O-ring, which activates the PTFE cap and ensures the sealing on the static side is leaktight. The recompressed O-ring provides the sealing function at low pressures, and when the application is pressurised, the O-ring puts more pressure on the PTFE cap, thus enhancing the sealing performance. Stick-slip-free performance is guaranteed by the material properties of the PTFE cap. ø DanaRoto is a double-acting system, which means that there is no preferred pressure direction.

The rod seal family provides a sealing effect between the rotating surface and the inner diameter of the seal.

Extreme chemical resistance
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Advantages:

Application Examples

Working conditions:

Frequently used - DanaFlon Material
Frequently used Material DanaFlon
Operating temperature range
–200 to +260 °C
–200 to +260 °C
Basis material
PTFE
PTFE
DanaFlon
55
32
Filler
Glass & MoS2
Carbon & Graphite
Colour
Light Gray
Dark Black
Extreme form stability and extrusion resistance
(Yes)
(Yes)
Lubricating media
Yes
Yes
Extreme wear resistance
(Yes)
(Yes)
Wide range of media
Yes
Yes
Non-lubricating media
Yes
Yes
Food applications
No
No
Conforms to food regulation
No
No
Alternative solution - DanaFlon Material
Frequently used Material DanaFlon
Operating temperature range
–200 to +260 °C
–200 to +260 °C
Basis material
PTFE
PTFE
DanaFlon
41
16
Filler
Carbon fibre
Mineral & MoS2
Colour
Dark gray
Blue / Gray
Extreme form stability and extrusion resistance
(Yes)
(Yes)
Lubricating media
Yes
Yes
Extreme wear resistance
(Yes)
(Yes)
Wide range of media
Yes
Yes
Non-lubricating media
Yes
Yes
Food applications
No
No
Conforms to food regulation
No
No

O-rings may limit the temperature range and need to be compatible with the media.

The performance of the seal will always depend on the overall picture of the working conditions.

Verification can only be done by testing the seal in the actual working conditions.

DanaRoto S pressure relieved R41

Technical details

Here you can see the technical details

An appropriate quality of the dynamic counterface is essential for good results. A surface hardness of 55-60 HRC is recommended for a hard layer with thickness min. 0,5 mm.

* Recommended finish for dynamic sealing surface
  • Ra max (0.2 μm)
  • Rz max (1.25 μm)
  • Rp max (0.63 μm)
  • Tp = 50 - 70% at depth of p= 0.25 Rz
Heading #3
Series
Rod
øB f8/h9
øA H9
G + 0,2– 0
Rmax
E Diametral Clearance
O-Ring
100 bar
200 bar
Serie
Cross sect.
max.
max.
R41
00
6 – 24,9
øB + 4,9
2,2
0,4
0,15
0,10
000
1,78
01
25 – 59,9
øB + 7,5
3,2
0,6
0,20
0,15
100
2,62
02
60 – 132,9
øB + 11,0
4,2
1,0
0,25
0,20
200
3,53
03
133 – 329,9
øB + 15,5
6,3
1,3
0,30
0,25
300
5,33
04
330 – 654,9
øB + 21,0
8,1
1,8
0,35
0,25
400
7,00
05
655 – 999,9
øB + 28,0
9,5
2,5
0,45
0,30
8,40
Part No. example
DanaRoto for 80 mm rod

Delivery times

For special requests, please complete our Request form or call us on +45 4922 4400.

Engineering request form

Please fill in the form below and we would appreciate it if you attach eventual drawings of hardware or seals to clarify technical demands.