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TESCOM™ Two Stage Gas Cylinder Pressure Regulator
44-3400 Series is a compact, lightweight high purity two-stage cylinder regulator for specialty, corrosive and pyrophoric gases less than 5 SCFM / 141 SLPM.
Diffusion-resistant metal-to-metal diaphragm seal ensures gas purity and integrity. Ideal for use in high pressure gas cylinders for specialty and industrial gases used with analyzers, lasers, and laboratory applications.
TESCOM™ Two Stage Gas Cylinder Pressure Regulator


Pressure Rating
Maximum Inlet Pressure: 3500 psig / 241 bar
Outlet Pressure Ranges: 0-25, 0-50, 0-100, 0-150, 0-250 psig / 0-1.7, 0-3.4, 0-6.9, 0-10.3, 0-17.2 bar
Body: 316 Stainless Steel, Brass or Monel
Bonnets: 300 Series Stainless Steel or Brass
Diaphragms: 316 Stainless Steel or Elgiloy®
Seats and Friction Sleeve (inner): Teflon®
Remaining Parts
316 Stainless Steel and Brass (for Brass models)
Operating Temperature
-40°F to 165°F / -40°C to 74°C
Port Size & Type
1/4 NPTF
Flow Capacity
Cv = 0.05
Weight (without gauges)
3 lbs / 1.4 kg
Additional Information
For custom modifications or a complete system solution, please contact your local sales office.


  • Provides a continuous, accurate outlet pressure regardless of inlet pressure fluctuations
  • Offers a decaying inlet characteristic of 0.04 psig / 3 mbar per 100 psig / 6.9 bar change in inlet pressure
  • Features a unique metal-to-metal diaphragm to body seal
  • Diaphragms are convoluted for greater accuracy and sensitivity
  • Available in 316 Stainless Steel, Brass or Monel
  • NACE compliant designs are available


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