Metal Jacketed Gaskets
Metal Jacketed Gaskets
Metal jacketed gaskets generally consist of a metal cover with a soft material insert. Metal Jacketed Gaskets have of a metallic outer shell with softer compressible filler materials. They have a soft filler inside a metallic jacket.
Metal-jacketed gaskets are made in many styles to suit the most demanding applications.In dependence on the metal cover metal jacketed gaskets are applicable in the area up to 700°C.
The metal sheet coating should be as soft and flexible as possible, but to prevent corrosion it is often made from a stainless steel jacket.
Because of their sealing capacity, given by exerting strong pressure on the flanges' circular rims, metal jacket gaskets can stand up to 30 percent deviation from their initial thickness, which is very useful for irregular or damaged flange rims. It is worth considering the chemical compatibility of the metal and the sealed medium.
Due to operating conditions and the consistency of the flange surface the insert has to be picked up carefully. It may be plain or corrugated jacket. Partition bars may be built-in or welded into the metal jacketed gasket. A gasket with welded bars has an advantage at seal quality. For a single piece of construction the minimum edge radius is 8 mm while there is no cap for a gasket with welded bars.
The metal jacketed gaskets especially are used in the area of the chemical, petrochemical and refinery industry as well as in the apparatus construction. Metal jacketed gaskets are particularly ideal for sealing flat heat exchanger surfaces, gas pipes, cast iron flanges, and autoclaves and similar.
Metal jacketed gaskets
The most basic type of the metal jacketed semi-metallic gasket has a compressible insert enclosed within metallic jacket. The soft insert material forces the metal to deform to suit the flange surface and effect a seal. Metal jacketed gaskets can be manufactured with a number of metals and high temperature fillers.
Metal Jacketed gaskets consist of a metallic outer shell with either a metallic or non-metallic compressed fibre filler. The filler material gives the gasket resilience, while the metal jacket protects the filler and resists pressures, temperatures and corrosion.
Metal jacketed gaskets often are used because of their efficiency where to a defective or incorrect alignment of the flange to compensate, a sealing performance is required, which can withstand a nip pressure of 20 to 30% of the original strength.
The metal jacketed are ideal for sealing surfaces of heat exchangers, valve cover, gas lines, vacuum tubes, Cast iron flanges, autoclaves, boilers and complexes for level indication.
Materials metal cover:
Monel (NiCu30Fe) - 2.4360
Steel - 1.1003, 1.4301, 1.4401, 1.4541, 1.4571
Brass - 2.0321
Aluminium - 3.0255
- other materials on request
Applications: This type of gasket, depending upon metal selected, is designed to be a heat exchanger gasket for high pressure, high temperature applications.
Temperature resistance °С : 700 С
P [bar] : 400 bar
External diameter up to 4000 mm
Gasket thickness: from 2 to 12mm
MP10 / MP10A