UL Compliant Diaphragms, Gaskets & Seals for Fire Protection Applications

Fire protection equipment depends on reliable sealing components to maintain pressure, prevent leakage and ensure that valves operate correctly when required. Rubber diaphragms, gaskets, O-rings and seals are therefore critical components in many fire protection valves and suppression systems.

For manufacturers of fire protection equipment, selecting the correct elastomeric components is important not only for performance but also for meeting applicable certification and end-use requirements.

Where Are Diaphragms, Gaskets & Seals Used?

UL provides testing and certification for a wide range of valves used in fire suppression systems, including deluge, pre action, dry pipe, alarm, check, butterfly, gate, pressure reducing and pilot operated valves. 

Common sealing components include:

• • Deluge valves: Rubber diaphragms, O-rings, seat seals and cover gaskets
  • Pre action valves: Diaphragms, O-rings, valve seals and gaskets
  • Dry pipe valves: Clapper/seat seals, O-rings and gaskets
  • Alarm valves: Seat seals, O-rings and sealing gaskets
  • Check valves: Rubber valve seats, O-rings and shaft seals
  • Butterfly valves: Rubber seats, shaft seals and O-rings
  • Pressure reducing valves: Control diaphragms, O-rings and sealing components
  • Pilot operated valves: Control diaphragms, O-rings and precision seals

The exact component requirements depend on the valve design, material, operating conditions and applicable end product standard.

UL Requirements for Gaskets & Seals

UL’s gasket and seal certification program evaluates non metallic materials such as elastomers, thermoplastics, O-rings and other sealing forms for specific end use applications. UL 157 includes an “extinguishing agents” end use environment for applicable gasket and seal materials. 

This distinction is important for fire protection equipment manufacturers. A rubber component should not automatically be described as “UL Approved” simply because it is manufactured for a UL Listed valve. Its certification or recognition must correspond to the applicable component and end product requirements.