The Qualitrol LPRD is a mechanical pressure relief device engineered to protect transformers and load tap changers from excessive internal pressure. Featuring a patented dual-gasket system for rapid response and automatic resealing, the LPRD offers visual and remote operation indication, optional alarm switches, and directional shielding for safe discharge of hot oil and gases. With over 50 years of field-proven reliability, it remains the industry standard for transformer overpressure protection.
 
Patented dual-gasket system for fast response and reliable resealing
Up to 4 Form C contacts with only 2 switch enclosures
IP65-rated switch enclosure standard; IP66 available with AS1000 switch
Visual operation indicator pin and optional semaphore
Rugged die-cast flange with corrosion-resistant coating
Directional shield for controlled hot oil/gas discharge