Metal jacketed gaskets consist of a partial or full metal
envelope, covering a soft pliable core. The sealing filler
provides good resilience to aid sealing, while the metal
jacket offers the suitable strength required for higher
pressure applications, fluctuating temperatures and
protection from corrosion of the core. Metal jacketed
gaskets offer a relatively economical seal where sealing
faces are narrow; they can be produced in a variety of
shapes, making them a good option for heat exchangers with
good, even flange surface finish (maximum 1.6um).
As well as Heat Exchangers metal jacketed gaskets are used in Vessels, Valve Bonnets, Pumps, Autoclaves, Engines and Exhaust Systems.
Metal jacketed heat
exchanger gaskets often consist of a sealing outer ring
with integral partition bars; SEP recommend (where
possible) that the outer ring seals independently, with any
partition bars welded in position and not fabricated in one
piece. Typical heat exchanger configurations are generally
3mm thick
.
| Jacket Materials | Application | ||||
| Soft Iron | Aluminium | Titanium | Nickel | PTFE | |
| Copper | Stainless Steel | Inconel | Hastelloy | Millboard | |
| Brass | Monel | Incoloy | 5 bar | Graphite | |
(If you are on a mobile device and cannot see the entire table, scroll the table left/right.)
Soft faced metal gaskets are an alternative to metal jacketed
where the requirement is for softer, conforming sealing layers
applied to the faces of a metal core. Whilst camprofile or
corrugated gasket upgrades may be considered, the cost of
machined serrations may not be necessary or
machining/corrugating large rectangular shaped gaskets is
impractical.
The cores are reusable after service, if appropriately cleaned, inspected and re-faced with new sealing material.
A typical gasket would be 3mm stainless steel, faced both sides with 0.5mm graphite.
