NAK Australia V Rings

NAK Australia V-Rings

	Technical Information
	Benefits
	Materials
	Profiles
	Frictional Losses
	V-Ring A Specifications
	V-Ring S Specifications
	V-Ring L Specifications

Economical Advantages of V-Rings
The demands of the V-Ring on the tolerances and surface finish of the sealing surfaces are small. Generally speaking a fine tuning operation and polishing of the counterface are sufficient. No special requirements are necessary concerning the machining of the shaft. The V-Ring does not wear the shaft which is an expensive component of the machine. Grooves worn in the shaft tend to impair the strength of the shaft and are difficult to remove. Only 55 V-Rings are required for different shaft diameters between 2.7mm and 630mm. This means low store costs. When changing a seal, expensive and time consuming disassembly can often be avoided. The V-ring can be stretched out and drawn over flanges, couplings and sometimes over complete bearing housings. Complicated designs can be avoided because by using a V-Ring the designer can adapt the seal to the design instead of vice-versa.

Materials
Nitrile rubber is the standard grade. It has excellent resistance to wear and withstands the majority of media to which a seal is exposed. Temperature range -40°C to +100°C. Fluoro Rubber (VITON®) is used where the operating temperatures are high, and in conjunction with certain aggressive media. Temperature range -23°C to +150°C in dynamic applications, -45°C to +230°C in static applications.

V-Ring Profiles
In order to meet customers requirements, V-Rings are now manufactured in a number of profiles. V-Ring S and V-Ring A differ only with regard to the rear face. The V-Ring S has a conical rear face, whereas the V-Ring A has a plain rear face and therefore demands less seal space. V-3, V-4 and rings greater than V-200 are manufactured in profile type A only. V-Rings larger than V-1000 are manufactured to order. The V-Ring L is a special thin profile, designed for use in existing labyrinth seals. This ring is manufactured as standard in the range V-140 to V-450. Larger V-Rings are made to order.

Frictional Losses
The interference pressure of the lip and subsequently the friction and frictional heat are very low. This will decrease with an increase in speed above 12 m/s. The diagram below shows empirical values.

vring1-1

V-Ring A Specifications

V-Ring Number	d₁	d	c	B	d₂	d₃	B₁	Axial Shaft Movement
V-3A V-4A V-5A V-6A	2.7 - 3.5 3.5 - 4.5 4.5 - 5.5 5.5 - 6.5	2.5 3.2 4 5	1.5 2 2 2	3.0 3.7 3.7 3.7	d₁ + 1 d₁ + 1 d₁ + 1 d₁ + 1	d₁ + 4 d₁ + 6 d₁ + 6 d₁ + 6	2.5 3.0 3.0 3.0	±0.3 ±0.4 ±0.4 ±0.4
V-7A V-8A V-10A V-12A	6.5 - 8.0 8.0 - 9.5 9.5 - 11.5 11.5 - 13.5	6 7 9 10.5	2 2 3 3	3.7 3.7 5.5 5.5	d₁ + 1 d₁ + 1 d₁ + 2 d₁ + 2	d₁ + 6 d₁ + 6 d₁ + 9 d₁ + 9	3.0 3.0 4.5 4.5	±0.4 ±0.4 ±0.6 ±0.6
V-14A V-16A V-18A V-20A	13.5 - 15.5 15.5 - 17.5 17.5 - 19 19 - 21	12.5 14 16 18	3 3 3 4	5.5 5.5 5.5 7.5	d₁ + 2 d₁ + 2 d₁ + 2 d₁ + 2	d₁ + 9 d₁ + 9 d₁ + 9 d₁ + 12	4.5 4.5 4.5 6.0	±0.6 ±0.6 ±0.6 ±0.8
V-22A V-25A V-28A V-30A	21 - 24 24 - 27 27 - 29 29 - 31	20 22 25 27	4 4 4 4	7.5 7.5 7.5 7.5	d₁ + 2 d₁ + 2 d₁ + 3 d₁ + 3	d₁ + 12 d₁ + 12 d₁ + 12 d₁ + 12	6.0 6.0 6.0 6.0	±0.8 ±0.8 ±0.8 ±0.8
V-32A V-35A V-38A V-40A	31 - 33 33 - 36 36 - 38 38 - 43	29 31 34 36	4 4 4 5	7.5 7.5 7.5 9.0	d₁ + 3 d₁ + 3 d₁ + 3 d₁ + 3	d₁ + 12 d₁ + 12 d₁ + 12 d₁ + 15	6.0 6.0 6.0 7.0	±0.8 ±0.8 ±0.8 ±1.0
V-45A V-50A V-55A V-60A	43 - 48 48 - 53 53 - 58 58 - 63	40 45 49 54	5 5 5 5	9.0 9.0 9.0 9.0	d₁ + 3 d₁ + 3 d₁ + 3 d₁ + 3	d₁ + 15 d₁ + 15 d₁ + 15 d₁ + 15	7.0 7.0 7.0 7.0	±1.0 ±1.0 ±1.0 ±1.0
V-65A V-70A V-75A V-80A	63 - 68 68 - 73 73 - 78 78 - 83	58 63 67 72	5 6 6 6	9.0 11.0 11.0 11.0	d₁ + 3 d₁ + 4 d₁ + 4 d₁ + 4	d₁ + 15 d₁ + 18 d₁ + 18 d₁ + 18	7.0 9.0 9.0 9.0	±1.0 ±1.2 ±1.2 ±1.2
V-85A V-90A V-95A V-100A	83 - 88 88 - 93 93 - 98 98 - 105	76 81 85 90	6 6 6 6	11.0 11.0 11.0 11.0	d₁ + 4 d₁ + 4 d₁ + 4 d₁ + 4	d₁ + 18 d₁ + 18 d₁ + 18 d₁ + 18	9.0 9.0 9.0 9.0	±1.2 ±1.2 ±1.2 ±1.2
V-110A V-120A V-130A V-140A	105 - 115 115 - 125 125 - 135 135 - 145	99 108 117 126	7 7 7 7	12.8 12.8 12.8 12.8	d₁ + 4 d₁ + 4 d₁ + 4 d₁ + 4	d₁ + 21 d₁ + 21 d₁ + 21 d₁ + 21	10.5 10.5 10.5 10.5	±1.5 ±1.5 ±1.5 ±1.5
V-150A V-160A V-170A V-180A	145 - 155 155 - 165 165 - 175 175 - 185	135 144 153 162	7 8 8 8	12.8 14.5 14.5 14.5	d₁ + 4 d₁ + 5 d₁ + 5 d₁ + 5	d₁ + 21 d₁ + 24 d₁ + 24 d₁ + 24	10.5 12.0 12.0 12.0	±1.5 ±1.8 ±1.8 ±1.8
V-190A V-199A V-200A V-220A	185 - 195 195 - 210 190 - 210 210 - 235	171 180 180 198	8 8 15 15	14.5 14.5 25 25	d₁ + 5 d₁ + 5 d₁ + 10 d₁ + 10	d₁ + 24 d₁ + 24 d₁ + 45 d₁ + 45	12.0 12.0 20.0 20.0	±1.8 ±1.8 ±4.0 ±4.0
V-250A V-275A V-300A V-325A	235 - 265 265 - 290 290 - 310 310 - 335	225 247 270 292	15 15 15 15	25 25 25 25	d₁ + 10 d₁ + 10 d₁ + 10 d₁ + 10	d₁ + 45 d₁ + 45 d₁ + 45 d₁ + 45	20.0 20.0 20.0 20.0	±4.0 ±4.0 ±4.0 ±4.0
V-350A V-375A V-400A V-450A	335 - 365 365 - 390 390 - 430 430 - 480	315 337 360 405	15 15 15 15	25 25 25 25	d₁ + 10 d₁ + 10 d₁ + 10 d₁ + 10	d₁ + 45 d₁ + 45 d₁ + 45 d₁ + 45	20.0 20.0 20.0 20.0	±4.0 ±4.0 ±4.0 ±4.0
V-500A V-550A V-600A	480 - 530 530 - 580 580 - 630	450 495 540	15 15 15	25 25 25	d₁ + 10 d₁ + 10 d₁ + 10	d₁ + 45 d₁ + 45 d₁ + 45	20.0 20.0 20.0	±4.0 ±4.0 ±4.0

V-Ring S Specifications

V-Ring Number	d₁	d	C	B	d₂	d₃	B₁	Axial Shaft Movement
V-5S V-6S	4.5 - 5.5 5.5 - 6.5	4 5	2 2	5.2 5.2	d₁ + 1 d₁ + 1	d₁ + 6 d₁ + 6	4.5 4.5	±0.4 ±0.4
V-7S V-8S V-10S V-12S	6.5 - 8.0 8.0 - 9.5 9.5 - 11.5 11.5 - 13.5	6 7 9 10.5	2 2 3 3	5.2 5.2 7.7 7.7	d₁ + 1 d₁ + 1 d₁ + 2 d₁ + 2	d₁ + 6 d₁ + 6 d₁ + 9 d₁ + 9	4.5 4.5 6.7 6.7	±0.4 ±0.4 ±0.6 ±0.6
V-14S V-16S V-18S V-20S	13.5 - 15.5 15.5 - 17.5 17.5 - 19 19 - 21	12.5 14 16 18	3 3 3 4	7.7 7.7 7.7 10.5	d₁ + 2 d₁ + 2 d₁ + 2 d₁ + 2	d₁ + 9 d₁ + 9 d₁ + 9 d₁ + 12	6.7 6.7 6.7 9.0	±0.6 ±0.6 ±0.6 ±0.8
V-22S V-25S V-28S V-30S	21 - 24 24 - 27 27 - 29 29 - 31	20 22 25 27	4 4 4 4	10.5 10.5 10.5 10.5	d₁ + 2 d₁ + 2 d₁ + 3 d₁ + 3	d₁ + 12 d₁ + 12 d₁ + 12 d₁ + 12	9.0 9.0 9.0 9.0	±0.8 ±0.8 ±0.8 ±0.8
V-32S V-35S V-38S V-40S	31 - 33 33 - 36 36 - 38 38 - 43	29 31 34 36	4 4 4 5	10.5 10.5 10.5 13.0	d₁ + 3 d₁ + 3 d₁ + 3 d₁ + 3	d₁ + 12 d₁ + 12 d₁ + 12 d₁ + 15	9.0 9.0 9.0 11.0	±0.8 ±0.8 ±0.8 ±1.0
V-45S V-50S V-55S V-60S	43 - 48 48 - 53 53 - 58 58 - 63	40 45 49 54	5 5 5 5	13.0 13.0 13.0 13.0	d₁ + 3 d₁ + 3 d₁ + 3 d₁ + 3	d₁ + 15 d₁ + 15 d₁ + 15 d₁ + 15	11.0 11.0 11.0 11.0	±1.0 ±1.0 ±1.0 ±1.0
V-65S V-70S V-75S V-80S	63 - 68 68 - 73 73 - 78 78 - 83	58 63 67 72	5 6 6 6	15.5 15.5 15.5 15.5	d₁ + 3 d₁ + 4 d₁ + 4 d₁ + 4	d₁ + 15 d₁ + 18 d₁ + 18 d₁ + 18	11.0 13.5 13.5 13.5	±1.0 ±1.2 ±1.2 ±1.2
V-85S V-90S V-95S V-100S	83 - 88 88 - 93 93 - 98 98 - 105	76 81 85 90	6 6 6 6	15.5 15.5 15.5 15.5	d₁ + 4 d₁ + 4 d₁ + 4 d₁ + 4	d₁ + 18 d₁ + 18 d₁ + 18 d₁ + 18	13.5 13.5 13.5 13.5	±1.2 ±1.2 ±1.2 ±1.2
V-110S V-120S V-130S V-140S	105 - 115 115 - 125 125 - 135 135 - 145	99 108 117 126	7 7 7 7	18.0 18.0 18.0 18.0	d₁ + 4 d₁ + 4 d₁ + 4 d₁ + 4	d₁ + 21 d₁ + 21 d₁ + 21 d₁ + 21	15.5 15.5 15.5 15.5	±1.5 ±1.5 ±1.5 ±1.5
V-150S V-160S V-170S V-180S	145 - 155 155 - 165 165 - 175 175 - 185	135 144 153 162	7 8 8 8	18.0 20.5 20.5 20.5	d₁ + 4 d₁ + 5 d₁ + 5 d₁ + 5	d₁ + 21 d₁ + 24 d₁ + 24 d₁ + 24	15.5 18.0 18.0 18.0	±1.5 ±1.8 ±1.8 ±1.8
V-190S V-199S	185 - 195 195 - 210	171 180	8 8	20.5 20.5	d₁ + 5 d₁ + 5	d₁ + 24 d₁ + 24	18.0 18.0	±1.8 ±1.8

V-Ring L Specifications

V-Ring Number	d₁	d	Axial Shaft Movement
V-140L V-150L V-160L V-170L	135-145 145-155 155-165 165-175	126 135 144 153	±1.5 ±1.5 ±1.5 ±1.5
V-180L V-190L V-200L V-220L	175-185 185-195 195-210 210-233	162 171 182 198	±1.5 ±1.5 ±1.5 ±1.5
V-250L V-275L V-300L V-325L	233-260 260-285 285-310 310-335	225 247 270 292	±1.5 ±1.5 ±1.5 ±1.5
V-350L V-375L V-400L V-450L	335-365 365-385 385-425 425-475	315 337 360 405	±1.5 ±1.5 ±1.5 ±1.5