Spiral wound gaskets of nonstandard dimensions and shapes, and larger diameters are available on request. To find out more about gasket sheet materials view the downloadable pdfs below. Pdf generic issues effecting spiralwound gasket performance. Chlorine institute pamphlet 95 gaskets for chlorine service.
Improper use or gasket selection could cause property damage andor serious personal injury. The metal hoop is preformed in v or w shaped profile, which allows the gasket to act as a spring between the flanges. With environmental concerns that demand positive seals, gasket sheeting is key. Inner ring recommended for all gaskets exceeding class ansi 600lbs. 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.
Although its basic fundamental principle has changed little since its creation, the production techniques and materials that have been developed. Spiral wound gaskets should always be in contact with the flange and should not protrude into the pipe or project from the flange. The metal strip provides outstanding resilience, while the flexible sealing filler guarantees excellent sealing. One of the main applications is steam sealing at high pressures or temperatures superheated steam. Spiral wound gasket basic characteristic and styles. The spiral wound sealing element provides resilience, strength, blowout resistance and superior sealability. The flexitallic change gasket performs without fail 60% longer than any other heat exchanger gasket, spiral wound, double jacketed, cmg or kammprofile gasket. 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. Gaskets for pipe flanges which includes spiral wound gaskets and nonmetallic. The spiral wound gaskets consist of a vshaped strip of metal which is wound into a spiral. Style wri spiral wound gaskets swg are identical to style wr, with the addition of a solid steel inner ring. Spiral wound gasket swg consists of thin metal hoop and nonmetal filler material that are simultaneously wound. In most cases, the gasket provides a seal by external forces flowing the gasket material into the imperfections between the mating surfaces.
The spiral wound gaskets are used to replace the plastic gaskets asbestos free or graphite when their limits of application are exceeded. 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. Spiral wound gasket spiral wound gasket with inner and outer ring sd10. 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. In this article we will discuss the spiral wound gasket basic characteristic and styles. Spiral wound gaskets are made of a preformed thin metallic strip combined with a soft sealing composite material, wound together under pressure to energize. Spiral wound gasket dimensions are in millimeters unless otherwise indicated. Profiles type sw spiral wound gasket without inner and outer ring for force shunt and groove and spring applications. When looking for a high pressure and high temperature gasket. Spiral wound gasket spiral wound gasket without inner and outer ring sd01. Generic issues effecting spiralwound gasket performance.
See below for gasket sheet materials offered by dracos distributors. Spiral wound gaskets must contain an appropriate filler between the winding for the application. Gasket handbook 1st edition fluid sealing association. 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. Spiral wound gaskets can be reinforced by an outer centering ring. 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. Pdf spiralwound gaskets swg are used extensively as primary seals in critical. Download spiral wound gaskets dn 15 to 600 asme b 16. Spiral wound gaskets spiral wound gaskets open a further dimension for safe and effective sealing. Spiral wound gaskets are the most commonly used gaskets for raisedface flanges. Flexitallic innovative gasket and sealing solutions. Characteristics the spiral wound gasket is suitable for use across a wide pressure range and is therefore virtually applicable.
The spiral wound gasket can be used to seal fluid pressures up to 250 bar and. The patented garlock edge spiral wound gasket is designed to reduce inward. Never use more than one gasket in one flange joint, and never reuse a gasket. For applications requiring gaskets that are totally free of organic content, please contact our engineering department to.
Data reported in this brochure is a compilation of field testing, field. Spiral wound gaskets are being successfully used in a wide range of applications. Flexitallic is the market leader in the manufacture and supply of static sealing solutions, delivering high quality industrial gaskets on a global scale. The metal strip holds the filler, providing the gasket with mechanical resistance and resilience. Grafit is universally applicable, highquality, asbestosfree material with the. The spiral wound gasket outer centring ring provides the following benefits. Spiral wound gaskets can be used for sealing flange joints. Sealing devices is an authorized flexitallic spiral wound gasket and metal gasket supplier in addition to.
The bolts should be free of damage and lubricated with hightemperature resistant greases before mounting. Spiral wound gaskets super inhibited graphite style. 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. They are used in all pressure classes from asme class 150 to class 2500. When flexitallic invented the spiral wound gasket in 1912, there was nothing like it. Apr 14, 2018 in this article we will discuss the spiral wound gasket basic characteristic and styles. Durlon gasket materials should never be recommended when both temperature and pressure are at the maximum listed. Gasket handbook 1 edition fluid sealing association. The filler acts as a seal, while the metal provides structural strength. The style mcs gasket is an exclusive flexitallic design, consisting of a flexitallic spiral wound gasket with an integral solid metal inner ring. Please contact flexitallic application engineering for technical assistance.
The primary purpose for this development was the increasingly severe temperatures and pressures used. The change gasket is easy to handle and install as a doublejacketed gasket. Flexitallic style cg and cgi spiral wound gaskets can be. Style aspcg spiral wound gaskets are ideal for high temperature and high pressure applications.
Spz type spiral wound gaskets, with different materials in the sealing zone, used to be manufactured with flange gasket. 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. 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 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.
Also on the gasket, is a solid outer ring used for centering and controlling compression. 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 graphite gaskets will tolerate certain irregularities and flange or sealing face deformations more than most other gasket types. 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. Technical catalogue spiral wound gaskets comdiflex. The spiral wound gasket with center ring is for use w ith flat face and raised face flanges, this gasket features increased compressive. 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. Pamphlet 95 provides chlorine manufacturers, packagers, and consumers with practical informati on that can be used to prevent failures and. 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. The designdimensions of the gasket diameters are stipulated by the asme b16. 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.
It follows then that in a properly designed gasket closure, three major considerations must be taken into account in order for a. Asbestos free, compressed, spiral wound metalic gaskets fibre. The inner retaining ring increases the axial rigidity and resilience of the gasket. However, selecting the right gasket for a leakfree seal requires. Styles cg and cgi can be compressed to the ring thickness, if necessary. Spiralwound gaskets open a further dimension for safe and effective sealing. Spiral wound gaskets are constructed by winding together a metal often stainless steel and a filler often graphite.
No application should be undertaken by anyone without independent study and evaluation for suitability. 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. This minimizes the risk of material creep through overtightening. They are ideal for steam, oil, liquids, gases, acids. Spiralwound gaskets spiralwound gaskets open a further dimension for safe and effective sealing. Required gasket compression for spiral wound gaskets spiral wound gaskets with internal or external rings, i. Image shows a spiral wound gasket with inner and outer ring. Flexitallic calls their kammprofile gasket lineup, flexpro. 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. Use the filters to narrow down your product selection, or you can also view the products by product type. Spiral wound gaskets flexitallic equals gasket material. Durlon spiral wounds are packaged with the utmost care to prevent damage during shipping to the job site.
230 304 814 13 437 469 1576 91 94 1075 1133 1162 80 9 802 1528 675 1332 64 1608 713 321 971 1079 269 1132 407 1156 600 499 264 891 1283 300 1437 1182 189 986 1274