METAL 'O' RING SEALS

Description and Applications of Metallic "O" Ring Seals

The Moontown O-Ring Seals are used when elastomers and other non metallic seals will not seal properly or do not offer the required reliability for the application, usually as a result of temperatures, pressures, or the environment. Moontown O-Ring Seals are long lasting seals and unlike non-metallic seals, they are not subject to failure due to incompatibility with the environment, out gassing or from deterioration due to age.

Moontown O-Ring Seals are generally fabricated from tubing. Typical tubing material consists of stainless steel or high temperature alloys such as inconel. These materials are frequently used because they offer resilient properties that enable the seal to "Spring-Back".

Moontown O-Ring Seals are used as static face type seals and should not be used as a dynamic seal. While the majority of seals are circular, many seals are produced in rectangular, racetrack and other various shapes and configurations.

We welcome the opportunity to design a seal to fit your application. Whether you are sealing gases or liquid -253°C or 1100°C vacuum to 3450 BAR. We have the capability to produce a suitable seal from available material.

The following are key elements in specifying the proper seal determining the base material:

Hardware

Internal Pressure

External Pressure

C ØA GROOVE
FREE HEIGHT TOL  DIAMETER RANGE DEPTH (F) MIN WIDTH (G) R MAX
0.89 +0.076/-0.025  9.52 - 44.45 0.63/0.68 1.40 0.25
1.57 +0.076/-0.025  10.30 - 101.60 1.27/1.37 2.29 0.38
2.39 +0.076/-0.025  25.40 -  304.80 1.87/2.00 3.17 0.50
3.18 +0.076/-0.025  50.80 -  1,016.60 2.54/2.67 4.06 0.76
3.96 +0.100/-0.000  76.20 - 914.40 3.17/3.30 5.08 1.27
4.77 +0.127/-0.000 101.60 - 1,219.20 3.83/3.98 6.35 1.27
6.35 +0.127/-0.000  52.40 -  1,828.80 5.08/5.28 8.89 1.52
9.53 +0.127/-0.000  04.80 - 3,048.00 8.25/8.50 12.70 1.52
12.70 +0.127/-0.000 610.00-  3,048.00 11.04/11.43 16.51 1.52

Plating and Coatings

Plating or Coating of the O-Ring Seal provides a soft malleable surface that will smear into small imperfections in the mating hardware. Enhancing seal performance

Shaped Seals

Metallic O-Ring Seals can be produced in various shapes. The availability of shaped O-Ring permits the design engineer to select the shapes; However, it is recommended to contact our Technical Service staff for design assistance of seal and groove.

Suggested minimum Radii for shaped seals

Free Height Min. Radius Free Height Min. Radius Free Height Min. Radius
0.89 3.18 3.18 19.00 6.35 101.60
1.57 6.35 3.96 38.10 9.53 152.40
2.39 12.70 4.78 50.80 12.70 254.00
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Moontown Ltd