Available in spiral wound and Flexpro™ (Kammprofile) facing styles, they provide safer, more cost-effective alternatives to industrial sealing problems where ultra-high heat resistance is critical; ex: oxidation of graphite in nuclear power exhaust systems.
They are suitable for replacing aramid, glass, and carbon fiber; PTFE; and graphite gaskets in a number of industrial applications.
The Flexitallic spiral wound gasket is the precision-engineered solution for flanged joints, heat exchangers, boiler handholes, manholes, and other high-temperature, high-pressure applications—providing resistance to virtually every known corrosive and toxic element.
Incredibly robust and resilient, metal-wound Change heat exchanger gasket is designed to deliver the most dynamic seal ever. Manufactured with proprietary equipment, using a 5-times thicker metal spiral and a unique laser welding process that penetrates completely through. So it requires no inner or outer ring, and is as easy to handle and install as a double-jacketed gasket. Best of all, it’s proven to perform without fail at least 60% longer than any other heat exchanger gasket, spiral wound, double jacketed, CMG, or Kammprofile, and that is a game changer.
We named our Kammprofile gasket Flexpro because it offers the compressibility of a sheet gasket for low sealing stress, along with the bolt tightness of a spiral wound gasket—plus the handling ease of a solid metal gasket and its resistance to buckling.
> Flexibility of a proven spiral wound, low seating stress of a kammpro
> Graphite filled like a spiral wound, graphite faced like a kammpro
> Sigma PTFE inner ring barrier protects the flange from acid corrosion and also fills any existing corrosion damage
> Unique wire profile stores more elastic energy to create better dynamic performance and superior load retention in cyclic applications
> Excellent recovery (tested with 34% recovery @ 18K PSI [124 MPa], 30% compression)
> No spring washers needed, no re-torque required*
> Cycle over & over, and maintain sealability
Developed for processes ranging from cryogenic temperatures to 500ºF (260ºC), and suitable for sealing virtually every chemical medium across the entire pH range (0-14). Sigma range materials contain non-stick properties that aid in an easy removal process after their usage to dramatically reduce the downtime on shutdown.
Now available in 80 x 80 sizes.
This corrosion management tool is both proactive in helping inspection and reactive in enabling repair. By reducing leaks and slowing corrosion the possibility of shut-downs with associated HSE visits are dramatically reduced, as is the huge loss of revenue associated with a stop in production.
Combining the technology of a Flexpro with the proven material technology of graphite and Sigma® to prevent further corrosion to existing flanges.
The SF and AF products are fiber reinforced, polymer bound, calendared sheet materials made using traditional manufacturing techniques. A wide range of organic and inorganic fibers is used in conjunction with a polymer matrix to provide the appropriate degree of chemical compatibility and sealing performance.
Flexicarb is an exfoliated graphite material with standard grades at 95% to 98% and a nuclear grade available at 99.5%. It can be supplied with an inorganic passivating inhibitor to increase its oxidation and corrosion resistance. Recent experiences and tests have shown that Flexicarb will oxidize over time. Care should be taken when considering the use of Flexicarb foil for applications above 330°C (650°F).
(Note: Flexicarb ST, SR and NR are the equivalents for Flexicarb RGS1, RGS3 and RGS4 which are the brand names used in the UK.)
Metal Jacketed Gaskets, as the name suggests, consist of a metallic outer shell with either metallic or non-metallic compressed fiber filler. The filler material gives the gasket resilience, while the metal jacket protects the filler and resists pressures, temperatures, and corrosion.
Available in both oval and octagonal configurations (interchangeable on the modern grooved flange). Standard ring type joints are manufactured to meet both API 6A and ASME B16.20 sizes and ratings.
It offers excellent chemical resistance, suitable for use with a wide range of media—with the exception of strong oxidizers. Suitable for sealing high-pressure, high-temperature valves in the power and petrochemical industries.
Flexitallic GP1: high-density packing made from continuous filament ‘E’ glass yarns—designed for metal processing, boiler doors, furnace doors, and coal and wood burning stove door seals; and Flexitallic CFP1: a ceramic yarn reinforced with glass carrier ideal for high-temperature crucible lids and furnace door seals.
Enviroflex 500 has been developed for use in Linear and Rotary valves and has exceeded the most stringent requirements for fugitive emissions, resulting in less product loss and reduced emission penalties. Where PTFE is of concern as a potential source of corrosion, select Enviroflex 506.
CHANGE-HF and CHANGE-CR
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