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18 Series Single-Stage General Purpose Regulator - Brass

USD $336.86

18 Series Single-Stage General Purpose Regulator - Brass

USD $336.86
Part Number:    18 Series
   Availability:   Ships within 24 hours from Montgomeryville, PA

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Product Description

MATHESON made in the USA



A general purpose regulator with rugged construction for use with non-corrosive gases.


• Use with gases that are 99.995% or lower purity
• Regulation of air supply to valves and actuators
• Inert gas supply for purging applications
• Calibration of pressure gauges, rotameters, and mass flowmeters
• Applications with high duty cycle/demanding operating conditions 

Design Features

• Forged brass body
• Neoprene diaphragm
• 2” inlet and delivery pressure gauges
• Equipped with outlet needle valve
• 1/4” NPTM outlet connection with loose 1/4" hose barb
• Porous metal filter to protect seat from contamination

Ordering Information  
Part Number* Max
Delivery Pressure
Delivery Pressure
Cylinder Pressure
SEQ18BCGA 15 psi 0-30 psi 0-4000 psi
SEQ18CGA 50 psi 0-60 psi 0-4000 psi
SEQ18LCGA 100 psi 0-150 psi 0-4000 psi
SEQ18HCGA 200 psi 0-400 psi 0-4000 psi
SEQ18RCGA 500 psi 0-1000 psi 0-4000 psi

Materials of Construction

• Gauges: Brass, Painted steel covers
• Body: Forged brass
• Bonnet: Chrome plated brass
• Diaphragm: Neoprene
• Seat: PTFE Teflon
• Seals: Neoprene 


• Maximum Inlet Pressure: 3000 psi (20,700 kPa)
• Typical max flow (100 psi del. press.):  15 SCFM-N2 (420 SLPM)
• Flow Capacity (Cv): 0.17 
• Operating Temperature: -20°F to 140°F (-29°C to 60°C)
• Porting (Regulator Body): 1/4” NPT Female
• Porting Configuration: 2 High, 2 Low

  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, 18 Series


Instructions, Economy Regulator


Drawing, 18

3D Model


Warranty Information