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

Applications

• 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

*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

Specifications

• 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

Instructions, General Regulator

3D Model

3220B

3220B-CP