PTFE Gasket / Fluororubber Gasket / Silicone Rubber Gasket

Factory-direct sealing gaskets for sight glasses, level gauges, and flange connections — available in PTFE, fluororubber (FKM/Viton), and silicone rubber. Precision-cut to match standard and custom sight glass dimensions. Compatible with all SightGlassTube products and most industrial flange standards.

Material Comparison

Material Temp. Range Chemical Resistance Best For
PTFE -200°C to +260°C Excellent — acids, alkalis, solvents Chemical, pharmaceutical, food processing
Fluororubber (FKM/Viton) -20°C to +200°C Very good — oils, fuels, hydraulic fluids Oil & gas, petrochemical, hydraulic systems
Silicone Rubber -60°C to +200°C Good — water, steam, mild chemicals Food & beverage, water treatment, general use

Key Properties

  • Precision-cut to match sight glass and level gauge dimensions exactly
  • Standard sizes in stock; custom inner/outer diameters available on request
  • Compatible standards: DIN, HG, JIS, ANSI flange dimensions
  • FDA-compliant options available for food and pharmaceutical applications
  • Sold individually or in bulk — minimum order quantities flexible for OEM customers

Typical Applications

  • Sealing for flange sight glasses and level gauge glasses
  • Chemical reactor and vessel flange sealing
  • Pharmaceutical autoclave and process vessel sealing
  • Food and beverage pipeline and tank connections
  • Oil and gas pipeline flanges and valve connections
  • Water treatment and steam system sealing

How to Select the Right Gasket

Match your gasket material to your process media and temperature. When in doubt, PTFE is the safest all-round choice for chemical resistance. For dynamic sealing or high-vibration environments, fluororubber offers better elasticity than PTFE.

Need a custom size, material, or bulk order? Contact us for a quote within 24 hours →