Spiral Wound Gaskets for Valves

Spiral Wound Gaskets for Valves are metallic composite gaskets designed to provide reliable static sealing between valve bodies, bonnets and other bolted connection surfaces. They are commonly used in industrial valves operating under demanding pressure, temperature and process conditions.

These gaskets are manufactured by spirally winding a formed metal strip together with a compressible filler material. The combination provides mechanical strength, resilience and sealing performance when properly compressed between mating surfaces.

Features & Advantages

• Metallic Composite Construction: Combines formed metal windings with compressible sealing fillers.

• Pressure & Temperature Resistance: Suitable material combinations can be used in demanding industrial valve applications.

• Resilient Sealing Structure: Spiral winding helps accommodate limited flange movement and changes in gasket compression.

• Multiple Filler Options: Flexible graphite and PTFE are commonly selected according to temperature and fluid compatibility.

• Corrosion-Resistant Materials: Stainless steel windings are available for various industrial process environments.

• Custom Valve Dimensions: Suitable for standard flanged connections and non-standard valve bonnet designs.

Materials & Construction

Spiral wound valve gaskets commonly use stainless steel 304, 316 or 316L metal windings with flexible graphite or PTFE filler materials.

Flexible graphite is widely used in high-temperature valve and process equipment, while PTFE is selected for applications requiring chemical resistance within its allowable temperature and compression limits.

Depending on the valve design, gaskets may be supplied without guide rings, with outer centering rings or with both inner and outer rings.

For standard flange applications, selected configurations are manufactured to ASME B16.20 dimensions. Custom bonnet gaskets are manufactured according to valve drawings or samples.

Typical Applications

• Gate valve bonnet connections

• Globe valve bonnet connections

• Industrial valve body joints

• Chemical and petrochemical valves

• Steam and thermal process systems

• Oil and gas processing equipment

• Power generation and industrial utilities

Standard & Custom Supply

CORA SEALS supplies spiral wound gaskets for industrial valves in various winding materials, filler combinations, dimensions and ring configurations.

Standard and custom gasket sizes can be sourced for valve manufacturers, industrial distributors and maintenance contractors.

For quotations, please provide the valve model, gasket inside diameter, outside diameter, thickness, winding material, filler material and quantity.

For standard flange connections, the applicable flange standard, nominal size and pressure class should also be specified.

Existing drawings, samples or valve bonnet dimensions are recommended for non-standard replacement gaskets.