The spiral wound gasket can be used to seal fluid pressures up to 250 bar and. This process of precise winding density control provides a gasket designed to meet your specified seating stress and assures consistent sealing of your most critical fluids. Gaskets for pipe flanges which includes spiral wound gaskets and nonmetallic. It follows then that in a properly designed gasket closure, three major considerations must be taken into account in order for a. The change gasket is easy to handle and install as a doublejacketed gasket. Chlorine institute pamphlet 95 gaskets for chlorine service. No application should be undertaken by anyone without independent study and evaluation for suitability. The vitaflex spiralwound gasket operates by the axial compression of the winding, which results in the plastic deformation of the filler material ptfe or.
The information provided on this website is given in good faith and is to be used for customer assistance only, and without liability on the part of the company. Technical catalogue spiral wound gaskets comdiflex. These materials are wound together in such a way that the final gasket has alternating layers of filler and metal. Spiral wound gaskets super inhibited graphite style. The aspcg style uses an 18 external ring which accurately centers the gasket on the flange face and provides additional radial strength to prevent gasket blowout and act as a compression stop. Inner ring recommended for all gaskets exceeding class ansi 600lbs. The section of the gasket that creates the seal between the flange faces is the spiral wound section, which houses the soft sealing element. Spiral wound gaskets are made of a preformed thin metallic strip combined with a soft sealing composite material, wound together under pressure to energize. One of the main applications is steam sealing at high pressures or temperatures superheated steam.
Style wri spiral wound gaskets swg are identical to style wr, with the addition of a solid steel inner ring. Spiral wound gaskets first and foremost the concept of spiral wound gasket construction was originated by flexitallic in 1912, starting a new era in safe, effective sealing. Type swi spiral wound gasket with inner support ring. The spiral wound gasket is semimetallic, comprising of a spirally wound v shaped stainless steel strip and a nonmetallic filler material, such as graphite or ptfe. The spiral wound sealing element provides resilience, strength, blowout resistance and superior sealability. Flexitallic is the market leader in the manufacture and supply of static sealing solutions, delivering high quality industrial gaskets on a global scale. Spiral wound gaskets must contain an appropriate filler between the winding for the application. Gasket handbook 1 edition fluid sealing association. Spiral wound gasket dimensions are in millimeters unless otherwise indicated. Klinger spiral wound gaskets pacline valves gaskets. The flexitallic change gasket performs without fail 60% longer than any other heat exchanger gasket, spiral wound, double jacketed, cmg or kammprofile gasket. Sealing devices is an authorized flexitallic spiral wound gasket and metal gasket supplier in addition to.
Acts as compression limiter preventing overloading and over compression of the spiral wound sealing element. Download spiral wound gaskets dn 15 to 600 asme b 16. Image shows a spiral wound gasket with inner and outer ring. Spiral wound gasket basic characteristic and styles. In this article we will discuss the spiral wound gasket basic characteristic and styles. Its called flexpro because it offers the compressibility of a sheet gasket for low sealing stress, along with the bolt tightness of a spiral wound gasket. Durlon gasket materials should never be recommended when both temperature and pressure are at the maximum listed. Profiles type sw spiral wound gasket without inner and outer ring for force shunt and groove and spring applications. Spiral wound gasket spiral wound gasket with inner and outer ring sd10. Flexitallic calls their kammprofile gasket lineup, flexpro. Characteristics the spiral wound gasket is suitable for use across a wide pressure range and is therefore virtually applicable. Please contact flexitallic application engineering for technical assistance. The spiral wound gaskets are used to replace the plastic gaskets asbestos free or graphite when their limits of application are exceeded.
Pdf generic issues effecting spiralwound gasket performance. Used as a guide for location of gasket between the bolts. Styles cg and cgi can be compressed to the ring thickness, if necessary. Packing and gasket product catalog pump packing pump packing suitable for stern tube and paper mill packing graphite free packing square braid construction 329 ordering information size packaged 10% item mm inch kg lbs number 6. Apr 14, 2018 in this article we will discuss the spiral wound gasket basic characteristic and styles. The primary purpose for this development was the increasingly severe temperatures and pressures used. Spz type spiral wound gaskets, with different materials in the sealing zone, used to be manufactured with flange gasket. Gasket sheeting materials vary by product, brand and suitable industry and performance use.
With environmental concerns that demand positive seals, gasket sheeting is key. To find out more about gasket sheet materials view the downloadable pdfs below. Normally the metal layers are separated by a filler, usually asbestos. Compressed nonasbestos fiber sheet gasket m596l spiral wound gasket 6596 spiral wound gasket 550 ring joint gasket sf300 for white mf300 for white sf300 for white mf300 for white, 7020 up to 1. Data reported in this brochure is a compilation of field testing, field. Never use more than one gasket in one flange joint, and never reuse a gasket.
Spiral wound gaskets should always be in contact with the flange and should not protrude into the pipe or project from the flange. Spiral wound gasket spiral wound gasket without inner and outer ring sd01. The inner retaining ring increases the axial rigidity and resilience of the gasket. The style mcs gasket is an exclusive flexitallic design, consisting of a flexitallic spiral wound gasket with an integral solid metal inner ring. In most cases, the gasket provides a seal by external forces flowing the gasket material into the imperfections between the mating surfaces. Spiral wound gaskets can be reinforced by an outer centering ring. Grafit is universally applicable, highquality, asbestosfree material with the. Spiral wound gaskets flexitallic equals gasket material. The inner ring provides radial support for the gasket on the id to help prevent buckling or imploding whilst also serving as an additional along with the outer ring compression limiter to prevent the spiral wound component from being overly crushed. When looking for a high pressure and high temperature gasket sprial wound gaskets are the industries standard.
Flexitallic innovative gasket and sealing solutions. The metal strip provides outstanding resilience, while the flexible sealing filler guarantees excellent sealing. Spiral wound gaskets are constructed by winding together a metal often stainless steel and a filler often graphite. Spiral wound gasket manufactured by wealson is widely uesd for sealing flange joints, manhole and handhole covers, tube covers, boilers, heat exchangers, pressure vessels, pumps, compressors and valves, in industries such as petrochemical, pharmaceutical, shipbuilding, and food processing, in power industries and nuclear power stations. Pdf spiralwound gaskets swg are used extensively as primary seals in critical. However, selecting the right gasket for a leakfree seal requires. The patented garlock edge spiral wound gasket is designed to reduce inward. The metal hoop is preformed in v or w shaped profile, which allows the gasket to act as a spring between the flanges. The bolts should be free of damage and lubricated with hightemperature resistant greases before mounting. Use the filters to narrow down your product selection, or you can also view the products by product type. Flexseal industrial is a full line gasket and oring distributor. This will not damage the gasket or affect the sealing performance and the ring is provided as a compression limiting stop. Although its basic fundamental principle has changed little since its creation, the production techniques and materials that have been developed. Spiral wound gaskets of nonstandard dimensions and shapes, and larger diameters are available on request.
Spiral wound gaskets swg general information and description the sealing element of the spiral wound gasket consists of a vshaped metal strip spirally wound in combination with a soft sealing material filler. Spiralwound gaskets spiralwound gaskets open a further dimension for safe and effective sealing. The spiral wound gaskets consist of a vshaped strip of metal which is wound into a spiral. The filler acts as a seal, while the metal provides structural strength. They are used in all pressure classes from asme class 150 to class 2500. Spiral wound gaskets can be used for sealing flange joints. Gasket handbook 1st edition fluid sealing association. We offer superior customer service and are committed to meeting the needs of all.
Required gasket compression for spiral wound gaskets spiral wound gaskets with internal or external rings, i. This minimizes the risk of material creep through overtightening. When looking for a high pressure and high temperature gasket. Improper use or gasket selection could cause property damage andor serious personal injury. The metal strip holds the filler, providing the gasket with mechanical resistance and resilience. The spiral wound gasket outer centring ring provides the following benefits. The necessity to seal effective under high pressure and temperature variations, flange rotation and vibrations demands a gasket with adequate stress retention, flexibility and recovery. Pamphlet 95 provides chlorine manufacturers, packagers, and consumers with practical informati on that can be used to prevent failures and. See below for gasket sheet materials offered by dracos distributors.
Asbestos free, compressed, spiral wound metalic gaskets fibre. Spiral wound gasket swg consists of thin metal hoop and nonmetal filler material that are simultaneously wound. This gasket are manufactured by winding of metallic strip, preformed v, alternated with inorganic fillers, can be made on specific standards asme, api, uni en or customers design. The spz spiral wound gasket can withstand severe operation conditions, as the ptfe sealing zone is protected by areas with graphite filler. For applications requiring gaskets that are totally free of organic content, please contact our engineering department to. Also on the gasket, is a solid outer ring used for centering and controlling compression.
Generic issues effecting spiralwound gasket performance. Durlon spiral wounds are packaged with the utmost care to prevent damage during shipping to the job site. Flexitallic style cg and cgi spiral wound gaskets can be. Spiral wound gaskets are the most commonly used gaskets for raisedface flanges. Style aspcg spiral wound gaskets are ideal for high temperature and high pressure applications. Chlorine institute pamphlet 95 gaskets for chlorine service users of chlorine gaskets are strongly encouraged to become familiar with chlorine institute pamphlet 95 gaskets for chlorine service. Spiral wound gaskets are being successfully used in a wide range of applications. Spiral wound graphite gaskets will tolerate certain irregularities and flange or sealing face deformations more than most other gasket types. Available for solidworks, inventor, creo, catia, solid edge, autocad, revit and many more cad software but also as step, stl, iges, stl, dwg, dxf and more neutral cad formats. The designdimensions of the gasket diameters are stipulated by the asme b16. Spiralwound gaskets open a further dimension for safe and effective sealing. The spiral wound gasket with center ring is for use w ith flat face and raised face flanges, this gasket features increased compressive. Spiral wound gaskets spiral wound gaskets open a further dimension for safe and effective sealing.
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