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TESCOM™ PS-3400 Series Two Stage Regulator
PS-3400 Series is a compact high purity two-stage cylinder regulator with tied diaphragms for low flows of toxic, flammable and pyrophoric gases.
Diffusion-resistant metal diaphragm seal ensures gas purity and integrity.
TESCOM™ PS-3400 Series Two Stage Regulator


Pressure Rating
Maximum Inlet Pressure: 3000 psig / 207 bar
Outlet Pressure Ranges: 0-25, 0-50, 0-100 and 0-150 psig / 0-1.7, 0-3.4, 0-6.9 and 0-10.3 bar
Body, Bonnet, Diaphragm: 316 Stainless Steel
Seat: CTFE (1st stage), PFA (2nd stage)
Friction Sleeves
Outer: 316 Stainless Steel
Inner: PTFE
Remaining Parts: 316 Stainless Steel
Operating Temperature
-40°F to 165°F / -40°C to 60°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.


  • Excellent decaying inlet characteristic: 0.06, 100 psig / 0.004, 6.9 bar inlet change
  • Positive seal design
  • Captured bonnet ports
  • Both diaphragms are convoluted for greater accuracy and sensitivity
  • Metal-to-metal diaphragm to body seal to minimize diffusion
  • Diaphragm-to-valve link enhances seat sealing integrity


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