When selecting gasket sheets for use in drinking water applications, it’s essential to choose materials that comply with regulatory standards for potable water contact and are safe for human consumption. Here are some gasket sheet options commonly used for sealing applications involving drinking water:

1. EPDM (Ethylene Propylene Diene Monomer) Sheets:

   • EPDM gasket sheets are widely used in drinking water applications due to their excellent water and weather resistance, as well as their compatibility with potable water. EPDM is a synthetic rubber material that is NSF/ANSI 61 certified for use in contact with drinking water. It offers good sealing performance and durability in various water treatment, distribution, and plumbing systems.

2. Nitrile Rubber (NBR) Sheets:

   • Nitrile rubber gasket sheets are another popular choice for drinking water applications. NBR offers good resistance to water, oils, and chemicals, making it suitable for use in water distribution systems, water treatment plants, and plumbing fixtures. Nitrile rubber sheets may also be NSF/ANSI 61 certified for use in contact with potable water.

3. Silicone Sheets:

   • Silicone gasket sheets are known for their excellent flexibility, temperature resistance, and compatibility with potable water. Silicone is a synthetic elastomer that is NSF/ANSI 61 certified and FDA approved for use in contact with drinking water. Silicone gaskets are commonly used in water purification systems, beverage dispensers, and food processing equipment.

4. PTFE (Polytetrafluoroethylene) Sheets:

   • PTFE gasket sheets offer exceptional chemical resistance and are considered safe for use in drinking water applications. PTFE is inert and does not leach harmful chemicals into the water. PTFE gaskets are commonly used in water filtration systems, pumps, valves, and other components where chemical compatibility and purity are critical.

5. Non-Asbestos Fiber Sheets:

   • Non-asbestos fiber gasket sheets, particularly those made from aramid fibers or cellulose fibers, may be suitable for certain drinking water applications. However, it’s essential to ensure that the material is compliant with relevant regulatory standards for potable water contact.

When selecting gasket sheets for drinking water applications, it’s crucial to choose materials that meet the requirements of regulatory standards such as NSF/ANSI 61, which establishes health effects criteria for materials in contact with drinking water. Additionally, compatibility testing should be conducted to ensure that the selected gasket material is suitable for the specific water composition and operating conditions.