Qualitrol XPRD Extra Large Pressure Relief Device


Mechanical over pressure protection device with integrated directional discharge outlet. Provides pressure relief and insulating fluid containment (requires optional piping) on transformers and load tap changers during over pressure conditions. Automatically reseals once pressure has fallen.


  • Dual spring loaded valve for quick operation and reseal after a pressure situation
  • 50% higher flowrate than the LPRD for increased tank protection during an over pressure event (12600 SCFM)
  • Utilizes the same bolt pattern as the LPRD and industry standards enabling direct replacement
  • Standard integrated directional shield with 8 inch diameter outlet to maximize flow rate and control hot oil and gas discharge
  • Reduces risk to environment, surrounding assets, and people in the immediate area when used in conjunction with piping kits
  • Variety of optional piping kits, flanges, and animal screens are available from Qualitrol to divert hot oil


  • Operating pressure, Gasket material, indicator style
  • Up to 2 latching or momentary switches (single or double pole form C, high DC, or low current gold contacts)
  • Electrical connection style
  • Gas bleed system
  • Stainless steel piping and body option

Group Created with Sketch. Applications

For over pressure protection on critical oil filled transformers, load tap changers, and other related electrical apparatus for maximum safety and environmental protection.

Compare to Similar Products

Qualitrol 206 MPRD Medium Pressure Relief Device

Qualitrol 206 MPRD Medium Pressure Relief Device

Uniquely designed tip/side gasket that seals under repeated operations

Up to 2 switches for alarm and control

Integrated gas bleed system

Learn More
Qualitrol Large Pressure Relief Device LPRD

Qualitrol LPRD/208/213/216 Large Pressure Relief Device

Stainless steel operating valve, fasteners, and hardware

Flange and ring are made from aluminum with a chromate conversion coating with exposed aluminum components receiving an additional epoxy paint coat

Switches can be specified to operate as latching or momentary, SPDT or DPDT, high DC, or low current gold contact type, and with connector, terminal box, or flying lead style connections

Learn More
Qualitrol XPRD Extra Large Pressure Relief Device

Qualitrol XPRD Extra Large Pressure Relief Device

Corrosion resistant stainless steel directional shield, hardware, and operating valve

50% more tank protection during overpressure events

Larger diameter throat and discharge outlet for increased flow

Learn More
You Also might be interested in
this product works well with