The Zight Tubular Gauge Glass washers are designed at the moment in two different materials, FKM (commonly called fluorine rubber), and EPDM (ethylene propylene diene monomer rubber)
The FKM washers are designed to withstand steam, water, and heat. They have an excellent chemical resistance and have a strong performance against works under pressure.
The EPDM washers are great for applications where the conditions won´t be as harsh, such as low-temperature systems, without steam service. Also where excellent chemical resistance is not a must.
If you are wondering about which washers to get, do not hesitate to contact us.