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3210B Series Single-Stage Corrosion Resistant Regulator - Monel

USD $2,766.16

3210B Series Single-Stage Corrosion Resistant Regulator - Monel

USD $2,766.16
Part Number:    3210B Series
   Availability:   Ships within 24 hours from Montgomeryville, PA

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Product Description

MATHESON made in the USA



Corrosive service regulators constructed of Monel and Elgiloy for superior corrosion resistance.


• Pressure regulation of acid forming halogen gases, such as hydrogen chloride, chlorine, hydrogen fluoride, hydrogen bromide, and silicon tetrafluoride
• Dispensing of corrosive calibration gases
• Research and development applications where a corrosion resistant regulator is required for either corrosive ambient conditions or corrosive gas service
• Applications requiring extended regulator lifespan in severe conditions.

MATHESON strongly recommends the use of a cross-purge with any regulator put into highly corrosive or toxic gas service. You can easily add a cross-purge to this model regulator by selecting "Yes" for the Cross Purge option above.

Design Features

• Monel and Elgiloy construction for excellent corrosion resistance
• PCTFE seat material for use with chlorinated compounds
• 2-1/2” Monel gauges
• Equipped with Monel needle valve on outlet
• 1/4” NPTM outlet connection

Ordering Information  
Part Number* Max
Delivery Pressure
Delivery Pressure
Cylinder Pressure
SEQ3215BCGA 50 psi 0-100 psi none
SEQ3216BCGA 250 psi 0-300 psi none
SEQ3219BCGA 50 psi 0-100 psi 0-3000 psi
SEQ3220BCGA 250 psi 0-300 psi 0-3000 psi

*Note: where CGA is replaced by the actual CGA number. Some CGA limitations may apply. (NI) for 1/4" FNPT inlet

Materials of Construction 

• Gauges: Monel
• Body: Monel
• Bonnet: 303 Stainless Steel
• Diaphragm: Elgiloy
• Valve Stem: Monel
• Valve Spring: Elgiloy
• Seat: PCTFE
• Friction Sleeve: PTFE

Materials of Construction (Outlet Valve)

• Body: Monel
• Stem: 316 Stainless Steel
• Packing: PTFE


• Maximum Inlet Pressure: 3000 psi (20,700 kPa)
• Flow Capacity (Cv): 0.20
• Operating Temperature: -40°F to 140°F (-40°C to 60°C)
• Porting (Regulator Body): 1/4” NPT Female
• Porting Configuration: 2 High, 2 Low
• Outlet Valve: SEQ104B
• Valve Outlet: 1/4" MNPT

Cross Purge Option

• Eliminates the escape of hazardous gases when changing cylinders
• Reduces danger of contamination from atmospheric moisture and oxygen
• Minimizes the amount of gas lost during cylinder changes
• Monel and Aluminum-Silicon-Bronze construction


Model 4775 Monel Cross Purge Assembly



Typical assembly of regulator and cross purge assembly
(stainless steel models shown here for illustration purposes)

  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
Mounting Nuts are also needed (see below).
The regulator knob will have to be removed in order to mount on this bracket.
  Mounting Nuts
These nuts can be used either with the above bracket or for mounting in a panel.


Flow Curves

Flow Curves, 3210B Series


Instructions, General Regulator

3D Model



Warranty Information