Pressure Relief Device for Liquid-Filled Transformers
Various advantages and characteristics of the Pressure Relief Device:

• Field proven top seal configuration provides high reliability and consistent operation. (Nitrile compound standard)
• Epoxy key-lock top seal retaining system improves gasket retention during high pressure relief operations. (Patent pending)
• Patented Nitrile secondary seal wiper gasket provides more reliable operation.
• Specially designed reverse would springs and assembly methods provide uniform valve loading and improved relief rates.
• Vacuum impregnated mounting flange casting with conversion coating prevents leaks resulting from casting porosity and provides excellent paint adhesion.
• A zinc clad deep drawn cover provides added corrosion protection.
• Type 304 stainless steel deep drawn operating disc with spring locater convolutions.
• Coated springs protect against rust and fatigue. Baked two part epoxy finish for additional corrosion resistance.
• All stainless steel fasteners and hardware.
• Brightly colored operation indicator with dual retainer.
• Many options available for standard and special applications.
• Pressure relief devices are 100% tested for proper operation and serialized for traceability.