Sealing products handle tough environments

Edited by the Engineeringtalk editorial team May 3, 2007

Moontown metal sealing prodcuts are useful where elastomeric and PTFE products are impractical due to temperature, pressure, radiation, permeability, fatigue or corrosion.

Metal sealing products available from Moontown can solve problems for the most demanding applications where the use of conventional elastomeric and PTFE products are impractical due to temperature, pressure, radiation, permeability, fatigue or corrosion.

The company specialises in providing successful sealing solutions with their range of metal O, C and E products.

Generally designed for use in static applications, the special U style design is manufactured to order for applications involving a limited degree of linear movement, as in expansion joints.

Typical applications include auto, aerospace and gas turbine engines together with compressors, accelerators, heat exchangers and reactors.

Pumps, valves and other equipment associated with a wide range of industry such as chemical, oil and gas, plastic moulding and RandD operations are also included.

Metal O-ring seals are generally fabricated from tubing including stainless steel, and high-temperature alloys such as Inconel.

These materials offer resilient properties that enable the seal to spring back, and are not subject to out-gassing, age deterioration or incompatibility with environmental conditions.

They can be used for either liquid or gas seals, at temperatures from -253C up to 1100C, at vacuum conditions as well as pressures up to 3450bar.

They can be supplied in free-height diameters from 0.89 to 12.7mm in O/D sizes (for internal pressure applications) and I/D sizes (for external pressures) of 9.52 to 3048mm.

Plain, nonself-energised seals can be used for pressures from ultra vacuum to 70bar positive pressure, with vented energised seals recommended for operation at pressures above 70bar.

Metal C-ring seals are particularly suited to applications involving pressure fluctuations and excessive heat.

These highly resilient seals can be used for internal, external and axial pressures under extreme conditions that would otherwise preclude the use of gaskets featuring organic materials.

Key to performance is in the C-shaped construction providing relatively high spring back levels compatible with lower flange load requirements.

To combine strength with temperature resistance, the seals are manufactured primarily from Alloy X750 OR 718 materials, but almost any alloy that can be formed can also be used.

They can be supplied in free heights from 0.79 to 12.7mm and ID/OD sizes from 4.75 to 3048mm diameter.

Spring energised versions of the C-ring seals can also be supplied for more critical and demanding applications including limited reciprocating and rotating motion.

Metal E-ring seals are designed for lighter loadings but provide superior flexibility and spring back, resulting in very good fatigue resistance.

These can be supplied for internal and external pressure applications in nominal free height sizes from 1.91 to 7.49mm and ID/OD diameters from 38 to 1524mm.

Most products are supplied in circular form but square, rectangular, oval and racetrack configurations as well as special shapes can also be accommodated.

Plating and surface coatings can also be provided, where the soft malleable seal surface smears into mating hardware, minimising surface imperfections and enhancing seal performance.

These metal sealing products complement an extensive range of spring energised PTFE-based seals also available from the company.