SIGMA® 511
Product Type:Sigma® 511 is a high performance biaxially oriented PTFE sheet sealing material, containing PTFE with silica filler.
Sigma® 511 is an advanced material specifically designed for flanges with low bolt loading, making it perfect for a variety of flange types such as glass-lined, ceramic, plastic, or those with distortion resulting in areas of low gasket stress. It effectively seals all chemicals across the pH spectrum (0-14), with the exception of molten alkalis and fluorine gas. Being composed solely of pure PTFE, it is also suitable for use with hydrogen fluoride.
ASTM F152 Tensile Strength (MPa): 10
ASTM F36J Compressibility (%): 55
ASTM F36J Recovery (%): 24
DIN 3535-6 Gas Permeability (ml/min): 0.01
ASTM F37A liquid leakage (ml/hr): 1.5
Temperature MAX: 500°F
Pressure MAX (psi): 739.69
*Typical values for 1.5mm thickness
*Note: Above pressure/temperature cannot be used simultaneously
Color: Pink
Standard compressibility
Strong acids (except hydrofluoric) to general chemicals
Can be used for all concentrations of sulfuric acid
Not suitable for molten alkali metals, fluorine gas or hydrogen fluoride
| Category | Specification |
|---|---|
| Approval | BAM for Oxygen, EC1935, FDA, FDA Compliant, TA Luft, WRAS |
| Brand | Sigma |
| Flange Face | Flat, Raised |
| Maximum Temperature | 260°C / 500°F |
| Media | Hazardous |
| Minimum Temperature | -200°C / -328°F |
| Pressure | 51 Bars / 739.69 PSI |
| Pressure Class | 150 & 300 |
| Pressure Rating | PN40 |