1. Structural composition:

Spiral wound gaskets usually consist of three parts:

Metal belt (V-type or W-type)

Material: stainless steel 304, 316L, 321, Monel, Inconel, etc.

Provide structural strength and elastic support, strong temperature and pressure resistance

Filling material

Commonly used: flexible graphite (high temperature resistant), polytetrafluoroethylene (PTFE, corrosion resistant), asbestos-free fiber

The filling layer can be selected according to the medium to provide sealing performance

Inner ring / outer ring (optional)

Inner ring: prevent extrusion at the inner diameter of the gasket and improve sealing stability

Outer ring: easy to position, prevent excessive compression, usually carbon steel or stainless steel

2. Main features:

✅ High temperature and high pressure resistance

Can withstand temperatures ranging from -200°C to +650°C, pressures up to 25MPa or more, suitable for supercritical conditions

✅ Good resilience and reliable sealing

The elastic combination of metal and non-metallic materials enables it to maintain a stable seal under conditions such as thermal expansion and pressure fluctuations

✅ Corrosion-resistant and chemical-resistant

Different fillers and metal materials can be selected according to the medium to cope with various working conditions such as acid, alkali, solvent, oil and gas

✅ High degree of standardization and easy replacement

Adapt to various flange standards such as ANSI, DIN, GB, JIS, etc., easy to install and maintain

✅ Various structural combinations

Such as basic type, type with inner ring, type with outer ring, type with inner and outer rings, can meet different sealing requirements