Overview
This D-type spiral wound gasket is engineered for high-performance sealing in critical flange connections. Designed to the HG/T20631-2009 standard, it is built for reliability in demanding industrial piping systems involving elevated pressures, thermal cycling, and aggressive media. The combination of a resilient PTFE filler wound with a 304 stainless steel metal strip, reinforced by inner and outer stainless steel retaining rings, creates a robust seal that maintains integrity under variable operating conditions.
Key Features
D-type construction with integral inner and outer centering rings Winding core of 304 stainless steel for structural strength and spring-back PTFE (Polytetrafluoroethylene) filler for exceptional chemical resistance Engineered sealing performance for 150-pound class flanges Manufactured to comply with HG/T20631-2009 industry standards Prevents gasket blow-out and over-compression
Suitable for a wide range of temperatures and pressures
Specifications
Material: 304 Stainless Steel winding with PTFE filler, 304 Stainless Steel inner/outer rings Nominal Pipe Size: 1 inch (DN25) Pressure Class: 150LB Gasket Type: D2232 (Spiral Wound with Inner and Outer Rings) Construction Standard: HG/T20631-2009 Package Quantity: 50 gaskets
Applications
Sealing chemical and petrochemical process piping
General industrial fluid handling systems
Flange connections requiring resistance to corrosive media
Utility and service lines in manufacturing facilities Maintenance and repair operations for standardized flange assemblies
