High-Performance Flange and Profile Gaskets from CRG

CRG (Canada Rubber Group Inc.) is now offering flange (G-ST) and profile (G-ST-P) gaskets that make blowouts and separation a thing of the past.  Manufactured by Kroll & Ziller, these gaskets use a steel insert vulcanized to the gasket sheath that eliminates blowouts and separation, even under extreme stresses.

These next generation gaskets will be valued by those customers who are seeking to reduce their operating costs and the incidence of fugitive emission. In particular, steel mills, power plants, petrochemical, and pharmaceutical industries, water and gas companies, and others with severe service or critical applications will value the exceptional performance and reliability of these quality gaskets.

About G-ST and G-ST-P Gaskets

G-ST and G-ST-P flange and profile gaskets employ a unique construction. G-ST gaskets have a steel insert, while G-ST-P gaskets combine the G-ST main body with a round cord ring. This static “O-ring” offers outstanding performance without requiring a cost-intensive groove to be placed on the joint surface. Once placed into service, high surface pressures transmitted from the main force of the flow are absorbed by the rigid body of the gasket.

Because it is vulcanized directly into the gasket sheath, the steel ring is protected from corrosion. In addition, since the steel ring lies parallel to the main force of the flow, it is ideally compressed against the sealing faces, even at low surface pressures. This feature also means that joint surface irregularities are easily accommodated by the gasket, and that minimum torque is required to be applied, thus preserving the material.

G-ST and G-ST-P gaskets offer an exceptional degree of operating reliability. Once in position, the gasket is sealed tight. This assured sealing advantage is especially critical for joints made of thermoplastic materials, such as PVC, PE, PP, or PVDF. Specific benefits of these gaskets include the following:

  • Sealing under minimum bolt tightening

  • Compensation of surface imperfections

  • Flange and bolt designs can be made more lightweight

  • Higher durability of plastic flange joints

  • Angle differences are more easily compensated for, compared to simple flat gaskets

  • Expensive machining of an O-ring groove on the flange is unnecessary

G-ST and G-ST-P Gasket Types and Materials

G-ST and G-ST-P flange and profile gaskets are available in a range of sizes and styles to suit a variety of joint materials and types. These include the following:

  • G-ST for flanges. With steel insert, supports various applications.

  • G-ST-P/S for steel pipes. Top choice for joints connecting non-metallic (plastics or GRP) and steel flanges.

  • G-ST-P/K for pressure pipelines made of thermoplastics. To suit flange joints connecting pairs of plastic stub ends.

  • G-ST-P/KN for non-load bearing flange joints. Top choice for partially coated flanges and heavy duty services.

  • G-ST-P/OE with a visible steel insert. A flexible design gasket with a visible stainless steel insert.

  • G-ST-P/HTB for fire-safe applications. For steel flange connections in fire-safe pipelines and fire-fighting systems.

  • G-ST-P/GR for rubber lined pipes. To suit pipework with soft rubber lining and flange faces with soft/hard rubber coating.

  • G-ST-P/ST with steel insert.

  • G-ST-GUSS. Available in special dimensions, for applications such as pipelines and facility construction works, for total covering of the flange face.

Fully certified to the DIN-DVGW and TUV standards, G-ST and G-ST-P gaskets are made from the highest quality materials, including the following:

  • NR – natural rubber

  • NBR-DUO – acrylonitrile butadiene rubber

  • HNBR – hydrogenated acrylonitrile butadiene rubber

  • CR – chloroprene rubber

  • CSM – chlorosulphonated monomer rubber

  • EPDM – ethylene propylene diene monomer rubber

  • FPM-S – fluorinated rubber acid proof

  • IIR – isobutene isoprene rubber (butyl rubber)

  • Steel Insert – carbon steel (standard) and stainless steel (optional)

If you are looking to reduce the costs associated with production disruptions, gasket rejections, and maintenance and repair, consider G-ST and G-ST-P flange and profile gaskets available from CRG.

To find out more about these high-performance gaskets, please contact our sales department at crg@canadarubbergroup.com.