DanaRoto R51

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.
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

Advantages:

Application Examples

Working conditions:

Pressure: 40 Mpa
Temperature: NBR O-ring: -30 to +100, FPM O-ring: -10 to +200
Application: Pivot movement
Speed: 1 m/s
Standard: ISO 7425-1
Diameter range: 6 to *1200 mm
Action: Double-acting

Frequently used - DanaFlon Material

Intensive movement - High pressure	–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

Intensive movement - High pressure	–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 R51

Technical details

Here you can see the technical details

* 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

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

Series		Rod øB f8/h9	øA H9	G ^{+ 0,2}_{- 0}	Rmax	E Diametral clearance		O-ring
						100 bar	200 bar	O-ring
						max.	max.	Series	Cross sect.
R51	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

Max radial clearance is based on DanaFlon 32 and 100 °C

Order example - DanaRoto for 80mm shaft

Delivery times

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

DanaRoto R51

Technical details

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