Industrial gasket

Ring Type Joint Gaskets

Metallic gaskets, which are manufactured from a variety of metals and alloys, usually oval or octagonal in cross-section, depending on the flange design.

Ring joints are designed to serve at high pressure (up to 1500 bar) and high temperature (up to 1000 C) applications. Very safe and reliable sealing system; will be always applied, when aggressive media or explosive gases are involved; Risk in the choice of ring joint material: the ring joint material must be softer than the flange material but the hardness of the flange material is normally not indicated.

Metal to metal sealing; requires therefore good (ra < 1,6) flange surface
Profile shapes R oval, r octagonal, rx, bx
Standard metals Soft iron, lc carbon, range of ss; other materials on demand

Spiral Wound Gaskets

The Spiral Wound Gaskets are composed of a metallic continuous stripe with a special shaped profile, coupled with a continuous filling stripe (Asbestos, PTFE, Grafoil, Ceramic etc) evenly wound in concentric spiral under constant stress. The Spiral Wound Gaskets are reinforced on the inner and outer diametre by winding of several electrically welded spiral metal only.

Materials:

Standard materials are type 304 Stainless steel with composite Asbestos Filler. Materials available are.

METALS FILLERS
Type 304 Stainless Compressed Asbestos Jointing Strips
Type 316 Stainless P. T. F. E. Sintered Strip
Aluminium Asbestos paper
Copper White Chrysotile Asbestos
Monel Blue African Crocidolite
Steel, Plain GRAFSEAL

Metallic & Semi-Metallic Gaskets

Metallic and semi-metallic gaskets include gaskets of the spiral wound, camprofile, metal jacketed and corrugated semi-metallic types. These gasket types are usually used in very demanding conditions, which require the gasket to withstand high pressures or temperatures, or exposure to chemicals.

Semi-metallic and metallic gaskets for higher temperature and higher pressure applications. NEOSEAL offers a comprehensive range of metallic and semi-metallic gaskets.

Metal Jacket Gaskets

A semi-metallic gasket system. Also called per tradition heat exchanger gaskets, which indicates the typical application. The gasket consists of soft filler encapsulated with a metal cover. The metal jacket provides compressive strength and blow out resistance. The filler provides compressibility and resilience.

Good shelve life

Robust, can be handled and installed without special care

Wide range of shapes

Requires a good flange surface (ra < 1,6) because of metal to metal sealing.
Profile shapes Profile S6 or S12.
Metal cover Carbon steel, SS, monel, copper, etc.
Fillers CSF, expanded graphite etc.
Dimension From 250 mm to 3000 mm.

Kammprofile (grooved) Gaskets

A semi-metallic gasket system, which consist of: centering (outer) ring made of special steel cam-profiled (sealing) ring made of special steel soft covering layer made of graphite, ptfe, ..

Typical applications:

  • pipelines, heat exchanger.
  • The soft cover adapts flange surfaces with ra < 6, 3
  • The soft covering layer (in most of the cases expanded graphite), is trapped in the tread and can not be extruded into the gap.
  • The trapped graphite provides good compressibility and resilience.
  • The cam profiled ring can be re-used again several times.
  • A good quality Kammprofile gasket can be very expensive.
  • Soft cover cam-profiled sealing ring outer ring.
Profile shapes Parallel (m18l, m20l, m21lm), or convex (m38l, m40l, m41lm).
Standard material of core Carbon steel, ss 316l, ss 304, ss 321; other materials are on

Corrugated Metal Gaskets

  • A metallic or semi-metallic gasket system.
  • High sealing pressure at the metal corrugation
  • High blow out resistance
  • In case of metal to metal, a perfect flange surface (ra < 3,2) is required.