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1250 Series Dual-Stage Medium-Purity Regulator - Brass

USD $631.16

1250 Series Dual-Stage Medium-Purity Regulator - Brass

USD $631.16
Part Number:    1250 Series
   Availability:   Ships within 24 hours from Montgomeryville, PA

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Product Description

MATHESON made in the USA



High purity regulators constructed for use with non-corrosive gases.


• Supply of carrier gas/detector support gas for gas chromatography applications.
• Calibration of pressure gauges, rotameters, and mass flow controllers.
• Applications where a constant delivery pressure is required.
• Applications with high duty cycle/demanding operating conditions. 

Looking for something a little bit different? Different inlet or outlet fitting or remove the outlet valve? Check out our Modified 1250 Pressure Regulator.

Design Features

• Chrome plated forged brass body
• Stainless steel diaphragms (1st and 2nd stages)
• 2” inlet and delivery pressure gauges
• Equipped with outlet diaphragm valve
• 1/4” NPTF outlet connection
• One-piece encapsulated seat with (10µ) internal filter to protect against contamination

Ordering Information  
Part Number* Max
Delivery Pressure
Delivery Pressure
Cylinder Pressure
SEQ1251CGA 15 psi -30"-0-30 psi 0-4000 psi
SEQ1252CGA 50 psi -30"-0-100 psi 0-4000 psi
SEQ1253CGA 125 psi -30"-0-200 psi 0-4000 psi
SEQ1254CGA 250 psi 0-400 psi 0-4000 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: Chrome plated brass
• Body: Chrome plated forged brass
• Bonnet: Chrome plated zinc die cast (1st and 2nd stages)
• Diaphragm:
          First Stage – 302 stainless steel
          Second Stage – 302 stainless steel
• Seats:
          First Stage – PTFE
          Second Stage – PTFE
• Seals: PTFE 


• Maximum Inlet Pressure: 3000 psi (20,700 kPa)
• Typical max flow (100 psi del. press.):  7 SCFM-N2
• Flow Capacity (Cv): 0.15
• Operating Temperature: -20°F to 140°F (-29°C to 60°C)
• Valve Outlet Connection: 1/4” NPTF
• Porting (Regulator Body): 1/4” NPTF
• Porting Configuration: 2 High, 2 Low, 1 Interstage

  Mounting Options
  53 Series Protocol Station
This brass manifold is designed to provide a safe, reliable way of wall-mounting a cylinder regulator. Manifolds are provided a durable stainless steel bracket, stainless steel flex hose (3 ft std.), and a CGA connection with integral check valve.


Flow Curves

Flow Curves, 1250 Series


Instructions, General Regulator


Drawing, 1250

3D Model


Warranty Information

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