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3120A Series Dual-Stage High-Purity Regulator - Brass

USD $607.06

3120A Series Dual-Stage High-Purity Regulator - Brass

USD $607.06
Part Number:    3120A Series
   Availability:   Ships within 24 hours from Montgomeryville, PA

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Product Description

MATHESON made in the USA



High-purity brass regulators designed for use with analytical applications. For use with non-corrosive gases.


• Supply of carrier gas/detector support gas for a variety of gas chromatography applications.
• Supply of calibration standards to on-line process analyzers, emission monitoring systems, etc.
• High purity applications with non-corrosive gases requiring a constant delivery pressure.


Looking for something a little bit different? Different inlet or outlet fitting or remove the outlet valve? Check out our Modified 3120A Pressure Regulator.

Design Features

• High-purity nickel plated brass barstock body
• High-purity 316 stainless steel diaphragm
• Metal to metal seals minimize diffusion of contaminants
• 2-1/2” inlet and delivery pressure gauges
• Equipped with outlet diaphragm valve
• Bonnet ported and threaded to pipe gases away from work area
• 1/4” compression tube outlet connection
• 10 micron metal filter protects seat from contamination
• Panel mountable, front bonnet and back bonnet threaded
• Optional interstage relief valve available
• Bonnet vent holes size: 1/8” FNPT


Materials of Construction

• Gauges: Chrome plated brass
• Body: Nickel plated brass barstock
• Bonnets: Chrome plated brass
• Diaphragms: 316 stainless steel
• Seats:
          1st Stage – Teflon
          2nd Stage – Teflon
• Seals: Metal to metal 


• Maximum Inlet Pressure: 3000 psig (20,700 kPa)
• Maximum Flow Rate (At 2500 psig, N2) :
          Model 3120A: 480 SCFH (225 SLPM)
          Model 3121A: 960 SCFH (451 SLPM)
          Model 3122A: 1200 SCFH (564 SLPM)
          Model 3126A: 1400 SCFH (658 SLPM)
          Model 3128A: 2000 SCFH (940 SLPM)
• Flow Capacity (Cv): 0.06
• Operating Temperature: -40°F to 140°F (-40°C to 60°C)
• Porting (Regulator Body): 1/4” NPT Female
• Porting Configuration: 2 High, 3 Low, 1 Interstage

Flow Curves

Flow Curves, 3120A/3810A Series


Instructions, General Regulator


Drawing, 3120A

3D Model


Warranty Information

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