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3870 Series Dual-Stage High-Purity Miniature Regulator - SS

USD $1,361.80

3870 Series Dual-Stage High-Purity Miniature Regulator - SS

USD $1,361.80
Part Number:    3870 Series
   Availability:   Ships within 24 hours from Montgomeryville, PA

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Product Description

MATHESON made in the USA



Compact, high-purity regulators for use with small cylinders.

Looking for something a little bit different? Different inlet or outlet fitting, or add an outlet valve? Check out our Modified 3870 Pressure Regulator.


• Applications requiring high-purity gases and a compact regulator due to space limitations

Design Features

• High-purity 316L stainless steel barstock body
• High-purity 316 stainless steel diaphragm
• 1-1/2” inlet and delivery pressure gauges
• 1/4” NPTF outlet connection
• Porous metal filter protects seat from contaminants
• Panel mountable
• 0-3000 psi cylinder pressure gauge

Ordering Information  
Part Number* Max
Delivery Pressure
Delivery Pressure
Cylinder Pressure
SEQ3871CGA 30 psi 0-60 psi 0-3000 psi
SEQ3872CGA 60 psi 0-100 psi 0-3000 psi
SEQ3873CGA 100 psi 0-200 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: 316 stainless steel
• Body: 316L stainless steel
• Diaphragm: 316 stainless steel
• Seat: Kel-F 81
• Seals: Teflon 


• Maximum Inlet Pressure: 3000 psi (20,700 kPa)
• Maximum Flow Rate: 11 SCFH (5 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
• Gauge Ports: 1/8” NPT Female
• Porting Configuration: 2 Low, 2 High


Instructions, General Regulator

3D Model


Warranty Information

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