Size: from 25mm to 6000mm
Thickness of gaskets: 2mm to 5mm (standard thickness 3mm)
Filler Material: SonGraf flexible graphite, PTFE, CNAF, ceramic
The spiral wound gasket depends upon the mechanical characteristics of a formed metal spiral strip, rather than the compressive virtues of more traditional gasket materials. This makes it particularly suitable for low or fluctuating bolt loads. The sealing strips, or fillers, are usually graphite, although other materials such as PTFE may be used, the windings are always s/steal. For this type of gasket to work the spiral must not be over compressed, hence one of two types of compression control is usually used.
The completed gasket is fitted into a steel ring of specific thickness. When the gasket is fitted into a flange and the bolt load is applied, flange closure is governed by the outer steel ring of the gasket. To further improve the pressure rating of the spiral wound gasket, a steel ring may be added to the inside. This also protects the windings (particularly the filler) , from contamination, or attack by, the product.
The second usually compression control is not fitted to the gasket at all, but engineered into the flange. These Gaskets are called Unsupported Spiral Wound Gaskets.
METAL WINDING STRIP
GUIDE RING MATERIALS
Kammprofile gaskets are recognized as a problem solver for heat exchangers, large vessels, and equipment that experience excessive movement due to thermal expansion. The Kammpro provides one of the tightest seals combined with superior load bearing characteristics. Kammpro gaskets consist of a sealing core metal with or without guide ring. The sealing core is a solid metal gasket with concentric serrations on both sealing surfaces and faced with soft material such as flexible graphite, EPTFE, or the HTG configuration depending on operating conditions. It is the preferred design when needing improved performance at low seating stresses. The simultaneous actions of a high compressibility facing material on the outside of the grooved metal in combination with limited penetration of the tips of the solid metal core enhance the interaction of the two materials. This allows the component to perform individually to their optimum capabilities.
It is available in different materials and shapes such as non-circular shapes which produced efficiently with extreme accuracy to fit various bonnet connection shapes, also it can be custom engineered to fit various applications. The suggested flange surface finish for Kammpro gaskets is 125-250 RMS.
|Ring Joint Gaskets Materials|
|Material||Designation||Maximum Hardness Rockwell B||Maximum Hardness Brinell|
|...Low Carbon steel||S||68||120|
|...304 Stainless steel||S 304||83||160|
|...316 Stainless steel||S 316||83||160|
|...347 Stainless steel||S 347||83||160|
|...410 Stainless steel||S 410||86||170|
|...INCOLOY 825||INC 825||86||170 |