High purity, single stage regulator with tied diaphragm and Hastelloy trim for use with low vapor pressure corrosive gases. 

Applications

• Supply of corrosive gases where extra corrosion resistance and positive shutoff is desired
• Supply of corrosive gases to manufacturing and research facilities 

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

• 316 stainless steel regulator body provides good corrosion resistance
• Hastelloy internal valve trim provides an extra measure of resistance in the most vulnerable area of the regulator
• Tied Diaphragm for positive shutoff
• Metal to metal diaphragm to body seal
• 2” Stainless Steel gauges
• Stainless Steel cylinder connection
• Stainless Steel outlet diaphragm valve
• Stainless Steel 1/4” compression fitting on outlet
• Cv = 0.45

*Note: where CGA is replaced by the actual CGA number. Some CGA limitations may apply. (NI) for 1/2" FNPT inlet

Materials of Construction

• Body: 316 stainless steel
• Diaphragm: Hastelloy
• Valve: Hastelloy
• Gauges: Stainless steel
• Seat: PCTFE

Specifications

• Maximum Inlet Pressure (3630A): 300 psi (2,070 kPa) 
• Maximum Inlet Pressure (3631A/3633A/3636A): 3000 psi (20,700 kPa) 
• Flow Capacity (Cv): 0.45
• Operating Temperatures: -40°F to +160°F (-40°C to +71°C)
• Body Porting: 1/4” NPT Female - gauges
• Body Porting: 1/2” NPT Female - inlet/outlet

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

Flow Curves

Flow Curves, 3630A Series

Instructions

Instructions, General Regulator

3D Model

3633A