Metallic Gaskets
Echelon-HF ™
Echelon-HF™
Specifically designed for Hydrofluoric Acid (HF), to safely seal an extremely dangerous chemical, as well as where crevice corrosion is a concern, Teadit®’s Echelon-HF™ Gasket is a superior choice. This design is based on an ASME B16.20 spiral wound (primary seal), with a camprofiled Monel® inner ring, providing all the advantages of an inner ring and ePTFE facing with the added benefit of creating a secondary seal that extends towards the bore of the pipe.
Echelon-HF™
Spiral Wound
The TEADIT® plant has manufactured spiral-wound gaskets since 1965. It is located in the largest and most progressive industrial and metallurgical complex in Brazil.
In 1975, TEADIT® moved into its present, modern facilities. The plant was further enlarged in 1982 when TEADIT® merged with another company which was engaged in the manufacture of metal expansion joints, shock absorbers and special bellows. Today, TEADIT® is one of the largest fabricators of spiral-wound gaskets, expansion joints and bellows in the world.
Style 911/911T
Style 911/911T. This is simplest style of spiral wound gasket, consisting of a circular winding without centering or inner rings. Spiral wound gaskets Style 911 are mainly used in tongue and groove or male and female. They are also used in equipment with space and weight limitations.
Style 911M
A style 911-M gasket is a sealing winding with an inner ring. The purpose of this ring is to fill out the space between the flanges, avoiding turbulence in the flow of the fluid or as a protection against corrosion or erosion. It is also used as a compression limit when the seating stress is greater than 30,000 psi (210 MPa).
Style 913
The construction of this gasket is circular metal winding with an outer guide ring. The sealing element is made of the specified metal and soft sealing material. The standard pipe size gaskets are made to ASME B16.20 (see also style 913M). These gaskets are used in a very wide variety of applications.
Style 914
Style 914 spiral wound gaskets are windings in non-circular forms like oval, rectangular and square with rounded corners, diamonds, oblong or pear shaped. Style 914 gaskets are used in boiler handholes and manholes, equipment, engine head-gaskets and exhaust systems. Inner rings should also be used for many of these applications.
Style 911/911T
Style 911M
Style 913
Style 914
Style 913M-OX
The specific needs of oxygen service applications were taken in consideration while developing Style 913M-OX, to make it the ideal sealing solution for oxygen-type service, such as GTL environments, where fire-safe design is essential. The Style 913M-OX spiral wound gasket is manufactured in a controlled and cleaned environment to insure the finished product is free from organic contaminants.
Style 913M CMP
For specific applications where crevice corrosion is a concern, Teadit® 913M-CMP is a superior choice. This design is based on an ASME B16.20 spiral wound, but with a camprofiled Monel® inner ring. The inner ring can even be sized to the bore. Typical application is for HF Alkylation Service, however, different metallurgies can be selected for superior corrosion protection in multiple conditions.
Style 913M
The 913M is the standard spiral wound gasket with an inner ring. The purpose of this ring is to fill out the space between the flanges, avoiding turbulence in the flow of the fluid or as protection against corrosion or erosion. It is also used as a compression limit. Gaskets with PTFE filler have a tendency to inward buckle thus the use of an inner ring is required by ASME B16.20.
Style 913M-OX
Style 913M CMP
Style 913M
Jacketed
A Jacketed Gasket is comprised of a soft pliable core inside a metallic jacket. Metallic Jacket Almost any metal or alloy found in sheet form can be used as a jacket; its choice must take into consideration the fluid to be sealed. The metallic jacket is 0.016 in (0.4mm) to 0.020 in (0.5mm) thick. Design The following recommendations are based on successful practical applications: Gaskets confined by the inside and outside diameters: Gasket inside diameter = groove inside diameter plus 1/16 in (1.6 mm). Gasket outside diameter = groove outside diameter less 1/16 in (1.6 mm). Gaskets confined by outside diameter: Gasket inside diameter = flange inside diameter plus a minimum of 1/8 in (3.2 mm). Gasket outside diameter = groove outside diameter less 1/16 in (1.6 mm). Non-confined gaskets: Gasket inside diameter = flange inside diameter pIus 1/8 in (3.2 mm). Gasket outside diameter = bolt circle diameter less bolt diameter. Filler The standard filler material is Flexible Graphite. Other fillers like ceramic, PTFE or another metal (corrugated, flat, or serrated) can be used.
Style 926 and 929
Style 926
Style 926 is similar to style 923 but the metallic jacket is corrugated. The corrugations act as a labyrinth.
Style 929
Style 929 is similar to style 926 with a corrugated metallic filler.
Style 923 and 927
Style 923 and 927. Style 923 is a flat double jacket gasket. Its most typical applications are in Heat Exchangers. ASME B 16.20 shows the gasket dimensions for ANSI B 16.5 flanges. The standard thickness is 1/8 in (3.2 mm). This style is also used in large size reactors in chemical plants. Another important use is for flanges in the large, low pressure ducting in Steel Mill Blast Furnaces.
Style 926 and 929
Style 923 and 927
Camprofile
Camprofile Style 942 and 946
Teadit® Camprofile gaskets are used by the chemical and petrochemical industry, as well as in power stations and refineries, on both standard pipework and special applications, e.g. shell and tube heat exchangers, etc.
Camprofile Style 942 and 946
Corrugated
Gasket 905 Metalbest
Style 905 Metalbest is a corrugated gasket style 900 metal core with Flexible Graphite facings (see figure below). It combines the sealing properties of the Flexible Graphite with the extrusion resistance of the corrugated metal core. The main advantage for using a 905 Metalbest is that it provides an extremely effective seal under low bolt loads.
Gasket 905 Metalbest
Solid
Style 940
Style 940 is a solid metallic gasket that has a smooth sealing surface and can be manufactured practically in any shape. Typical applications are in valves, heat exchangers, hydraulic presses and tongue and groove flanges. The strong points are mechanical and chemical attack resistance and they can be used in elevated temperature and pressure service.
Style 940
Filler/Facing
Filler/Facing Materials for Metal Gaskets
In addition to the filler/facing materials offered in the metallic gasket product section, TEADIT® offers the following high temperature materials.
Filler/Facing Materials for Metal Gaskets
Metallic Materials
Metallic Gasket Supplemental Materials
The following are our most widely used alloys in manufacturing industrial gaskets, their major characteristics, temperature limits and approximate Brinell hardness (HB).