DanaCap R81

DanaCap is a sealing system developed to enhance the O-ring sealing properties in terms of wear, friction and stick-slip. The sealing system consists of an elastomeric O-ring and a PTFE cap. The seal is suitable for reciprocating applications.
Thanks to the PTFE cap, the O-ring is not in direct contact with the moving surface. The PTFE cap is energised by the O-ring and the PTFE. No stick-slip occurs in the hardware contact. This sealing system is used in standard O-ring grooves in accordance with ISO 9194 and AS4716.

The seal can be equipped with notches. These are tiny grooves in the side of the seal in radial direction to assist O-ring activation in case of persistent pressure pulsation with retraction. The Rod seal family provides a sealing effect between the intermittently moving surface and the inside diameter of the seal. Please refer to our order guide for the Dana-Seals designations of seals, materials, notches, etc. Please refer to our installation guide for further installation details.

Extreme chemical resistance

Advantages:

Application Examples

Working conditions:

Pressure: 35 Mpa
Temperature: NBR O-ring: -30 to +100, FPM O-ring: -10 to +200
Application: Static/semi-dynamic
Speed: 15 m/s
Standard: ISO 9194 AS4716
Diameter range: 4 to *400 mm
Action: Double-acting

Frequently used - DanaFlon Material

Static and semi-dynamic applications	–200 to +260 °C
Basis material	PTFE
DanaFlon	18
Filler	Additives
Colour	Blue
Sealing against gas	yes
Wide range of media	yes
Lubricating media	yes
Non-lubricating media	yes
Food applications	no
Conforms to food regulation	no
Extreme wear resistance	no
Extreme form stability and extrusion resistance	no

Alternative solution - DanaFlon Material

Intensive movement - High pressure	–200 to +260 °C
Basis material	PTFE
DanaFlon	31
Filler	Carbon
Colour	Black
Extreme form stability and extrusion resistance	(yes)
Lubricating media	yes
Extreme wear resistance	(yes)
Wide range of media	yes
Non-lubricating media	yes
Food applications	no
Conforms to food regulation	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.

DanaCap R81

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

Series		Rod øB h9	øA H9	L	G ^{+ 0,2}_{- 0}	R	E Diametral clearance	O-Ring
Series		Rod øB h9	øA H9	L	G ^{+ 0,2}_{- 0}	max	max.	Series	Cross sect.
R81	00	4 - 9,9	øB + 2,9	1,45	2,40	0,4	0,13	000	1,78
	01	10 - 19,9	øB + 4,5	2,25	3,60	0,4	0,13	100	2,62
	02	20 - 39,9	øB + 6,2	3,10	4,80	0,6	0,15	200	3,53
	03	40 - 119,9	øB + 9,4	4,70	7,10	0,8	0,17	300	5,33
	04	120 - 400,9	øB + 12,2	6,10	9,50	0,8	0,25	400	7,00
	06	8 - 19,9	øB + 4,0	2,00	3,20	0,5	0,13	-	2,40
	07	20 - 45,9	øB + 5,0	2,50	4,00	1,0	0,15	-	3,00
	08	46 - 145,9	øB + 10,0	5,00	7,50	1,0	0,17	-	5,70
	09	146 - 250,9	øB + 15,0	7,50	11,00	1,0	0,25	-	8,40
	10	4 - 9,9	øB + 2,9	1,45	3,80	0,4	0,13	000	1,78
	11	10 - 19,9	øB + 4,5	2,25	4,65	0,4	0,13	100	2,62
	12	20 - 39,9	øB + 6,2	3,10	5,70	0,6	0,15	200	3,53
	13	40 - 119,9	øB + 9,4	4,70	8,50	0,8	0,17	300	5,33
	14	120 - 400,9	øB + 12,2	6,10	11,20	0,8	0,25	400	7,00
	16	8 - 19,9	øB + 4,0	2,00	4,60	0,5	0,13	-	2,40
	17	20 - 45,9	øB + 5,0	2,50	5,40	1,0	0,15	-	3,00
	18	46 - 145,9	øB + 10,0	5,00	9,30	1,0	0,17	-	5,70
	19	146 - 250,9	øB + 15,0	7,50	13,20	1,0	0,25	-	8,40

Order example - DanaCap for 30 mm bore:

Delivery times

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

DanaCap R81

Technical details

Hauptsitz

Produkte

Hilfreiches