Overview
This industrial-grade spiral wound gasket is engineered for reliable sealing in demanding piping and pressure vessel applications. Designed for a 4-inch nominal pipe size (DN100) with a 150-pound pressure class rating, it provides a robust seal for standard ASME B16.5 flanges. The gasket is constructed to the HG/T 20631-2009 standard, ensuring dimensional consistency and performance integrity for a wide range of industrial services. Its specialized material construction offers a balance of mechanical strength and broad chemical compatibility.
Key Features
Features a resilient spiral wound construction with alternating layers of metal and filler. The winding is made from premium 316L stainless steel for corrosion resistance. The filler material is PTFE (polytetrafluoroethylene), known for exceptional chemical inertness. Includes an integral outer containment ring (C-type design) to prevent gasket over-compression and blowout. Provides a reliable seal across a wide range of temperatures and pressures. Suitable for both indoor and outdoor use in various industrial environments. Packaged as a set of eight gaskets for convenient inventory and project use.
Specifications
Standard: HG/T 20631-2009 Nominal Size: 4 inches (DN100) Pressure Class: 150LB Construction Type: Spiral Wound with Outer Ring (C-Type) Metal Winding Material: 316L Stainless Steel Filler Material: Polytetrafluoroethylene (PTFE) Chemical Base: Polytetrafluoroethylene Sealant Type: Gasket Indoor/Outdoor Use: Both Paintable: No Package Quantity: 8
Applications
Ideal for sealing flanged connections in chemical and petrochemical processing pipelines. Suitable for use in pharmaceutical, food, and beverage industries where purity and chemical resistance are required. Applicable in power generation, water treatment, and general industrial plant maintenance. Effective for sealing services involving acids, solvents, caustics, and other aggressive media compatible with PTFE and 316L stainless steel. Commonly used on pumps, valves, heat exchangers, and vessel manways.
