Additional Information

Additional Information

Account Navigation

Account Navigation

Currency - All prices are in AUD

Currency - All prices are in AUD
 Loading... Please wait...



3420A Series High-Purity Line Regulator - Brass

USD $700.18

3420A Series High-Purity Line Regulator - Brass

USD $700.18
Part Number:    3420A Series
   Availability:   Ships within 24 hours from Montgomeryville, PA

Request Quote

Product Description

MATHESON made in the USA



High-purity brass line regulator designed for analytical applications with non-corrosive gases.


• Point-of-use regulation of high-purity gases used in chromatography or other analytical applications (see table below for details)


Design Features

• High purity nickel plated brass barstock bodies
• High purity 316L stainless steel diaphragms
• Metal to metal seals minimize diffusion of contaminants
• 2-1/2” delivery pressure gauge
• Available with outlet diaphragm valve
• 1/4” or 1/8” compression tube inlet/outlet connection
• 10 micron metal filter protects seat from contamination
• Bonnet threaded for panel mounting
• Body screw thread tapped for back mounting, 10-32 UNF
• Bonnet vent hole size: 1/8” NPTF

Ordering Information  
Part Number Max
Delivery Pressure
Delivery Pressure


SEQ3420A 15 psi -30"-0-30 psi X 1/4" Compression
SEQ3420ANV 15 psi -30"-0-30 psi   1/4" Compression
SEQ3420A2 15 psi -30"-0-30 psi X 1/8" Compression
SEQ3420ANV2 15 psi -30"-0-30 psi   1/8" Compression
SEQ3421A 50 psi -30"-0-100 psi X 1/4" Compression
SEQ3421ANV 50 psi -30"-0-100 psi   1/4" Compression
SEQ3421A2 50 psi -30"-0-100 psi X 1/8" Compression
SEQ3421ANV2 50 psi -30"-0-100 psi   1/8" Compression
SEQ3423A 125 psi -30"-0-200 psi X 1/4" Compression
SEQ3423ANV 125 psi -30"-0-200 psi   1/4" Compression
SEQ3423A2 125 psi -30"-0-200 psi X 1/8" Compression
SEQ3423ANV2 125 psi -30"-0-200 psi   1/8" Compression
SEQ3425A 250 psi 400 psi X 1/4" Compression
SEQ3425ANV 250 psi 400 psi   1/4" Compression
SEQ3425A2 250 psi 400 psi X 1/8" Compression
SEQ3425ANV2 250 psi 400 psi   1/8" Compression

Materials of Construction

• Gauge: Chrome plated brass
• Body: Nickel plated brass barstock
• Bonnet: Chrome plated brass barstock
• Diaphragm: 316L stainless steel
• Seat: Teflon
• Seals: Metal to metal 


• Maximum Inlet Pressure: 3000 psi (2,760 kPa)
• Typical Max Flow Rate (100 psi del press): 8 SCFM-N2 (230 SLPM)
• Flow Capacity (Cv): 0.08
• Operating Temperature: -40°F to 140°F (-40°C to 60°C)
• Flow Direction: Right to Left
• Porting (Regulator Body): 1/4” NPT Female
• Porting Configuration: 2 High, 2 Low

  Mounting Options
  Mounting Bracket for Single Stage & Line Regulators
Two 10-32 screws are needed to mount the back of the regulator to this bracket.
  Mounting Bracket for Regulators
PMK-2N Mounting Nuts are also needed (see below).
The regulator knob will have to be removed in order to mount on this bracket.
  PMK-2N Mounting Nuts
These nuts can be used either with the above bracket or for mounting in a panel.


Flow Curves

Flow Curves, 3420A/3430A Series


Instructions, General Regulator


Drawing, 3420A

3D Model



Warranty Information

Find Similar Products by Category