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TESCOM™ NA4 Changeover Regulator
NA-4 Series Changeover System is designed to ensure a continuous supply of carrier and calibration gases with no interruption due to supply depletion or change out.
Complete systems can include CGA connections, hoses, check valves, purge valves, pressure switches, alarms, etc. Ideal for petrochemical analyzer sampling systems, gas delivery systems, laboratories and welding gases.
TESCOM™ NA4 Changeover Regulator


Maximum Inlet Pressure
3000 psig / 207 bar
Outlet Pressure Ranges
0-30, 0-60, 0-100, 0-150, 0-200, 0-300, 0-500, 0-750, 0-1000 and 0-1500 psig / 0-2.1,0-4.1, 0-6.9, 0-10.3, 0-13.8, 0-20.7, 0-34.5, 0-51.7, 0-68.9 and 0-103 bar
Body Material
Brass, 316 Stainless Steel
Seat Material
Teflon® (Regulators), CTFE (Valves)
(Outlet Option 0-5): 316 Stainless Steel
(Outlet Option 6-9): Buna-N
Friction Sleeve
Inner: Teflon®
Outer: 316 Stainless Steel
Remaining Parts
Brass, 316 Stainless Steel
Operating Temperature
-40°F to 165°F / -40°C to 74°C
Flow Capacity
Cv = 0.06
Weight (approximate)
10 lbs / 4.5 kg
Additional Information
For custom modifications or a complete system solution, please contact your local sales office.


  • Supports up to eight cylinders per side – 16 total
  • Brass or Stainless Steel regulators and valves
  • Flexibility in shut-off valve type and location for increased customizing
  • Available with either a low pressure or high pressure line regulator
  • Optional remote mount annunciator