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XPRD Extra Large Pressure Relief Device

Brand: Qualitrol Company

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.
Features
  • 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" 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

Specifications

Alarm Switch Enclosure

  • Die Cast Aluminum with Polyester Powder Coats

Ambient Operating Temperature

  • -40° to 80° C (-40° to 176° F), Tank Fluid at 30° C (86° F)

Base Flange Material

  • Cast Aluminum, ASA 70 Light Gray Polyester Powder Coat

Dielectric Strength

  • 2000 Vac, 50/60 Hz for 1 Minute

Flow Rate

  • 12,600 Standard feet³ Per Minute at psi: 15 (kPa: 103.4, bar: 1.034) with 10 psi Operating Pressure

Gasket Material

  • Nitrile (Standard)
  • Viton

Indicator Material

  • Semaphore: Epoxy/Polyester Painted Aluminum
  • Semaphore: Nylon

Recommended Tank Opening

  • 6.75” (171.5 mm)

Ring Material

  • Cast Aluminum, Chromate Conversion Coated

Salt Spray Testing

  • Materials & Coating withstand 1000 Hours of Salt Spray Testing Per ASTM B: 117 with No Appreciable Loss of Strength in Any Structural Members

Shield / Hardware Material

  • Stainless Steel

Shield Turning Radius

  • 12.73” (323.3 mm)

Spring Material

  • ASTM A229 Oil-Tempered Spring Wire, Epoxy/Polyester Painted

Switch Enclosure

  • IP54

Switch Rating

  • DPDT: 0.25 A at 250 Vdc, Non-Inductive
  • DPDT: 0.5 A at 125 Vdc, Non-Inductive
  • DPDT: 10 A at 125/250 Vac (Standard)
  • High DC (SPDT Only): 10 A at 125 Vdc

Valve Material

  • Stainless Steel, Sealing Areas Lubricated with Silicone-based Lubricant
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