Medium Pressure Relief Device (MPRD) is designed for over-pressure conditions on oil filled transformers, load tap changers, and other related electrical apparatus.
Uniquely designed tip/side gasket that seals under repeated operations
Up to 2 switches for alarm and control
Integrated gas bleed system
Compact protection of personnel and equipment
Stainless steel shield mounted on top of device redirects flow of hot oil and gas away from personnel or critical parts on the transformer
Mesh flow opening allows for the quick pressure relief, protecting your equipment while limiting the possibility of debris entering the device
100% Tested for life-long performance
Every unit is tested and certified to meet operating standard prior to shipping, with test records kept on file
When the pressure rises rapidly above the operating pressure, the unit will exhaust with a percussive “bang”
Device positively reseals at no less than half its normal operating pressure
The indicator and optional alarms will trip as the mechanism actuates
Corrosion resistant materials and robust design provide dependable protection
Mechanically fastened dual sealing gasket eliminates the potential of seal blowout and protects against contaminants such as dirt and moisture
Flange, ring and valve are made from aluminum and painted with a thermosetting powder coat for long life
Switches are protected by durable cast enclosures with IP66 rating
Operating pressure is adjustable in three ranges (2.9 to 5.7 PSI, 5.8 to 8.6 PSI and 8.7 to 11.6 PSI)
Available with Nitrile or Viton gaskets
Available with up to two switches for alarm and control functions, with or without shield
