Three-Stage Regulators

This Three-Stage Regulators are preset regulator specially designed to deliver a highly accurate and consistent low-pressure supply of nitrogen to oil-filled power transformers. Available with or without electronic pressure switch.

The regulator will deliver and maintain 0.50 PSIG in the head space of oil-filled transformers. A built-in self-relieving valve set at 8 PSIG protects the system from over-pressurization due to temperature variation.

Both models come with rapid-fill bypass pressure valve allowing rapid filling of the transformer with 6 PSIG of pressure.

Notes:

  • Operation temperature: -40° to +180° Fahrenheit.
  • Operation voltage (model 16347-3): 5 amps at 12/24 volts DC or 125 volts AC. 3 amps at 250 volts.
  • Pressure switch setting: Adjustable from 70–300 PSIG (ships preset at 250 PSIG), 3/32-inch Allen head screw switch.
  • Switch wiring: Normally open or normally closed (DPDT), three 18-inch flying leads.

Information Chart for the 16391 Three-Stage Nitrogen Low-Pressure Blanketing Regulator

Stock
Number
Preset
Outlet
Pressure
1st Stage
Preset
Outlet
Pressure
2nd Stage
Preset
Outlet
Pressure
3rd Stage
Bypass Rapid
Fill / Purge
Inlet
Connection
Outlet
Connection
Max Inlet
Pressure
16391150 PSIG into 2nd stage8 PSIG into 3rd stage0.4–0.6 PSIG into outlet6 PSIGCGA5801/2" FNPT3000 PSIG
16347-3150 PSIG into 2nd stage8 PSIG into 3rd stage0.4–0.6 PSIG into outlet6 PSIGCGA5801/2" FNPT3000 PSIG
Stock Number 16391
Preset Outlet Pressure 1st Stage150 PSIG into 2nd stage
Preset Outlet Pressure 2nd Stage8 PSIG into 3rd stage
Preset Outlet Pressure 3rd Stage0.4–0.6 PSIG into outlet
Bypass Rapid Fill/ Purge6 PSIG
Inlet ConnectionCGA580
Outlet Connection1/2" FNPT
Max Inlet
Pressure
3000 PSIG
Stock Number 16347-3
Preset Outlet Pressure 1st Stage150 PSIG into 2nd stage
Preset Outlet Pressure 2nd Stage8 PSIG into 3rd stage
Preset Outlet Pressure 3rd Stage0.4–0.6 PSIG into outlet
Bypass Rapid Fill/ Purge6 PSIG
Inlet ConnectionCGA580
Outlet Connection1/2" FNPT
Max Inlet
Pressure
3000 PSIG

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