Spiral Wound Gaskets |
A spiral wound gasket is manufactured by spirally winding a preformed metal strip and a filler on the outer periphery of metal winding mandrels. The winding mandrel outside diameter forms the inner diameter of the gasket and the superposed metal and non-metallic windings are continually wound until the required outer diameter is attained. Normal practice is to reinforce the inner and outer diameters with several plies of metal without fillers. This engineered product is “tailor made” to be compatible with the flange closure in which it is to be used. |
| |
| Style R |
 |
Basic construction, inner and outer diameters are reinforced with several piles of metal without filler to give greater stability and better compression characteristics. Suitable for tongue and groove or male and female or grooved to flat face assemblies.
|
| |
| Style RIR |
 |
Solid inner metal ring acts as a compression stop and fills the annular space between flange bore and the inside diameter. Designed to prevent accumulation of solids, reduce turbulent flow of process fluids and minimize erosion of flange faces. Suitable for male and female pipe flanges.
|
| |
| Style CG |
 |
Utilizes an external ring which accurately centers gasket on flange face: provides additional radial strength to prevent gasket blowout and acts as a compression stop. A general purpose gasket suitable for use with flat face and raised face flanges.
|
| |
| Style CGI |
 |
Suitable for use with flat face and raised face flanges and specified for high pressure/temperature service or where corrosive or toxic media are present. Note on use of inner rings: ASME B16.20 which covers spiral wound gaskets requires the use of solid metal inner rings in:
- Pressure Class 900, nominal pipe sizes 24” and larger
- Pressure Class 1500, nominal pipe sizes 12” and larger
- Pressure Class 2500, nominal pipe sizes 4” and larger
- All PTFE filled gaskets
ASME B16.20 recommends the use of inner rings if the user’s experience has shown inward buckling of the gasket. Flexitallic recommends the use of inner rings for the following applications:
- Vacuum service or suction side of rotary equipment such as pumps and compressors
- Aggressive media, high pressure or temperature
- Surface finishes smoother than 125 micro-inch
- If over compression of the gasket is a concern
It is customary to select inner ring material to be the same as the metal winding.
|
| |
Flexpro Gaskets (Kammprofile) |
The compressibility of a sheet gasket…..low seating stress
The sealability of a spiral wound gasket…..excellent tightness
The handleability of a solid metal gasket…..doesn’t spring apart like spiral wound gaskets…..no buckling during installation or in service. |
|
| Style PN |
 |
Flexpro gaskets are selected for use in confined locations, including male and female, tongue and groove, and recessed flange arrangements.
|
| Style ZG |
 |
Variation of the PN Flexpro, utilizing an integral outer locating ring for correct gasket positioning within the mating flange bolt circle. Style ZG Flexpro gaskets are recommended for use on standard raised face and flat face flange assemblies.
|
| |
| Style ZA |
 |
Flexpro is a slight variation of the Style ZG. The integral outer locating ring is replaced by a loose fitting independent ring which is preferred where flange differential radial thermal expansion may be encountered. These rings may also be spot welded.
|
| |
Metal Jacketed Gaskets |
| Metal Jacketed Gaskets, as the name suggests, comprise of a metallic outer shell with either a metallic or non-metallic asbestos free filler. The filler material gives the gasket resilience, while the metal jacket protects the filler and resists pressures, temperatures and corrosion. They are traditionally used for heat exchanger applications, pumps, and valves; however the resilience and recovery properties of these gaskets are limited. Metal Jacketed Gaskets require exacting conditions of flange surface finish, high bolt loads, and flange flatness in order to effect a seal. |
| |
| Single Jacketed |
 |
The filler material is enclosed in a metal jacket which covers the inside and outside diameter of the gasket. Typical low pressure applications include boilers, compressors, pumps, and diesel and gasoline engines.
Style 120 is not recommended for standard pipe flanges. Minimum flange width 6.4mm (1/4”). Nominal gasket thickness 3.2mm (1/8”).
|
| |
| Double Jacketed |
 |
The filler material is completely enclosed by a two piece metal jacket, which covers both the inside and outside diameters and both contact surfaces Double Jacketed Gaskets are used on boiler and heat exchanger applications when ample bolting is available to correctly seat the gasket. They are designed for high pressure and temperature applications up to and inclusive of class 900. The temperature limitation of the gasket is dictated by the combination of metallic and non-metallic materials used in its construction.
|
| |
| Solid Corrugated |
 |
As the name suggests, the solid corrugated metal gasket is comprised solely of metal and does not contain any non-metallic fillers in its construction. The temperature limitation of the gasket is therefore only effected by the metal selected.
|
| |
Specials |
| Custom-made gaskets specially designed for critical applications. Include combination of designs and materials to solve demanding challenges. |
| Low Stress SWG |
 |
Compression achieved at very low seating stresses
Intended for class 150 & 300
Prevents need to exceed ASME allowable stress
|
| |
| Carrier Ring |
 |
High Recovery For Thermal Cycles
Ring Protects Sealing Robust -
Seal Element Location Accurate
Re-Use Body
|
| |
| HX-RIR |
 |
Ideal for Heat Exchangers:
- High Recovery For thermal cycles
- Internal Ring protects sealing element
- High Level of Sealing
- Accurate Seal Element Location
- Centre of gasket closer to bolt pitch
Sealing element protected from media
|
| |
| Baker Gasket |
 |
Emissions are restricted within the commitment zone and directed onto reactive paint:
- Highlights Potential Problems
- Speeds Up Detect and Repair Programs
- Improved Plant and Operator Safety
Variety of Paints Available to Detect Almost Any Chemical
|
| |
| Hot Gasket |
 |
High Operator Temperature Gasket
Heat Shield. Prevents Oxidation of the Graphite
Suitable for temperatures up to 1000°C
Uses High recovery Inconel X750 winding Strip
|
| |
| Return to Gaskets | Home |
