GL system for explosion protection

By adding conductive particles, these components become electroconductive and can be used for explosive applications. The flowing products can for example be aggressive or combustible liquids or gases.

For function and assembly, please look at the GL Screw Joint System which is constructed in the same way.

The surface resistance of these components is:
PTFEGlossaryPTFEPolytetrafluoroethylene -EX: approx. 10⁵ Ohm
PPSGlossaryPPS Polyphenylsiloxan -EX: approx. 10³ Ohm

PTFEGlossaryPTFEPolytetrafluoroethylene -EX and PPSGlossaryPPS Polyphenylsiloxan -EX are inherently flame-retardant and selfextinguishing. The oxygen index (LOI-value) stands for the oxygen content in the ambient atmosphere in which a material continues burning after inflaming without additional energy source. The oxygen index of PTFEGlossaryPTFEPolytetrafluoroethylene -EX is approx. 95%, the oxygen index of PPSGlossaryPPS Polyphenylsiloxan -EX is approx. 50%. Both materials do not burn under normal conditions since the oxygen content of air is 21%.

The materials are black and therefore UV-resistant. They can be used for products which react to UV rays.

Due to the addition of conductive pigments (e.g. electrographic carbon), the components may be attacked by strongly oxidizing products such as acids, caustic solutions or halogens.

The complete system must be earthed professionally. It is advantageous to roughen the surface around the earthing clip to improve the contact.

BOLA components with conductive particles can be identified by their black colour. The caps can be identified by the “EX” mark. An attrition test on paper can also help. The component is rubbed slightly on a white piece of paper. A colouration indicates that the component has conductive particles.