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Seal dimension

Groove dimensions

Load

AS		RS		MT	DC	DG	GD	WG	R
Axial section	Tolerance on AS (cross section)	Radial section	Material code	Material thickness	Diametrical clearance	Diameter Groove (range)	Groove Depth (min/max)	Width Groove (minimum)	Radius (max.)	N/mm Circum- ference	Spring Back in mm
0,79	+/- 0,05	0,71	M H	0,12 0,18	0,05	6-25	0,64-0,69	1,02	0,25	30 50	0,04 0,03
1,19	+/- 0,05	0,96	M H	0,12 0,20	0,07	8-50	0,94-1,02	1,40	0,30	20 35	0,05 0,04
1,57	+/- 0,05	1,26	M H	0,15 0,25	0,10	10-200	1,27-1,37	1,91	0,38	10 40	0,08 0,06
2,39	+/- 0,05	1,91	M H	0,25 0,38	0,15	13-400	1,91-2,01	2,67	0,51	35 65	0,10 0,08
2,79	+/- 0,05	2,25	M	0,25	0,15	20-500	2,23-2,31	3,10	0,55	30	0,12
3,18	+/- 0,08	2,54	M H	0,38 0,51	0,20	30-600	2,54-2,67	3,43	0,76	45 100	0,15 0,13
3,96	+/- 0,08	3,17	M H	0,41 0,61	0,25	45-750	3,18-3,30	4,32	1,27	40 110	0,20 0,17
4,78	+/- 0,10	3,82	M H	0,51 0,76	0,30	75-900	3,84-3,99	5,08	1,27	65 150	0,22 0,18
5,60	+/- 0,10	4,50	M	0,51	0,30	75-1000	4,48-4,65	5,90	1,27	55	0,22
6,35	+/- 0,10	5,08	M H	0,64 0,97	0,40	100-1200	5,08-5,28	6,60	1,52	75 160	0,30 0,27
7,90	+/- 0,10	6,32	M	0,64	0,50	100-1500	6,32-6,58	8,22	1,52	65	0,30
9,53	+/- 0,10	7,62	M H	0,97 1,27	0,60	300-2000	7,62-8,03	9,65	1,52	120 250	0,40 0,32
12,70	+/- 0,13	10,16	M H	1,27 1,65	0,80	600-3000	10,16-10,67	12,70	1,52	150 250	0,55 0,48

Load and spring back figures are based on Inconel X750 in the age hardened condition. Actual load figures and to a lesser extend spring back can differ hugely from the given data. Tolerances on groove depth, plating, diametrical clearance and differences in material batches can create differences of up to 100% for the smaller cross sections, down to 50% for the bigger cross section.

Example: CI - 009947 - 3.96M - 2/0 - 2 - SN50

CI	Seal Type CI: Internal pressure, system pressure energised

009947

Seal Diameter (DSO)

009947 = 99,47 mm, for groove OD = 99,82

The seal diameter is always the outside diameter without plating. The diameter is calculated as follows:
Nominal outside groove diameter, DG, minus clearance or DC minus 2 times the maximum plating or coating thickness.
or
DSO = DG - DC - (Plating thickness X 2)
DSO = 99,82 - 0,25 - 2X 0,05 = 99,47 mm

3.96M

Cross Section

Select the proper cross section or axial section (AS) in the table, then select the material code “M or H” based on the desired wall thickness.

2/0

Material

The first digit designates the C ring material, the second is always "0" in case of a C ring (without spring).

Available Materials & Codes
Jacket		Spring
Code	Material	Code	Material
1	Alloy X-750*	0	-
2	Alloy 718	0	-
5	304 SS	0	-
(*) X-750 will become obsolete Other materials on special request

2	Treatment 2: Age hardened View the code description in a pop up window.

SN50

Plating

Plating Code “SN” = Tin Plating

Plating Thickness “50” = 30 to 50 Microns

View the code description in a pop up window.

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Resilient metal seals from High Tech Metal Seals NV are used in the most extreme environmental conditions. Spring Energised Metal C Rings are used under extreme conditions where temperature can range from cryogenic up to extreme high temperatures, such as 800°C.
To serve the harsh conditions in today’s Oil and Gas exploration, High Tech Metal Seals NV designs and manufactures resilient metals seals which comply and exceed the ISO 15848 leakage requirements for valves intended for application with volatile air pollutants and hazardous fluids. High Tech Metals Seals are manufactured from high alloy materials so that the finished product complies with NACE MR0175 requirements. Silver plated Metal O rings or Metal C Rings, because of ductile layer are successfully used in high vacuum applications. Silver plated or PTFE coated spring energised C Rings and Metal C Rings comply and exceed the ISO 15848 leakage requirements, from cryogenic temperatures up to extreme high temperatures and pressures. In nuclear applications, particle research, and other radiation application, typically high load resilient metal seals, such as spring energized metal C Rings or Metal O Rings, with a ductile layer of silver are successfully used. High Tech Metal Seals NV, seals for extreme environmental conditions are particularly suited for high pressure. The system pressure assist in maintaining intimate contact with the mating flanges.