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Victor Professional Single Stage SR 450, High Capacity, D (125 PSIG), Oxygen, 540, 9/16-18 UNF (M)

Recommended for applications where slight delivery pressure increases (due to decreasing cylinder pressures) would not affect the performance characteristics of the work or test results. The SR450 regulators are designed for medium to high capacity.

Recommended for applications that require a constant delivery pressure over a range of decreasing inlet pressures. This precise two stage regulation provides superior operating characteristics for applications where change in delivery pressure would affect performance characteristics of work or test results.

  • Brass Adjusting Screw with forged T-handle (VTS 700 only)
  • Delrin Insert Bushing for durability, easier adjusting
  • Die-Forged Brass Sprying Housing Cap provides greater strength and durability
  • Stainless Steel Diaphragm givs accurate long lasting service
  • Stem-Type Seat Mechanism inlet pressure aides in sealing
  • Stainless Ball in Key for easy adjustment
  • Adjusting Spring pretested for quality assurance
  • Die-Forged Brass Body for extra strength
  • Precision Machined Nozzle for optimum flow control
  • Adjusting Spring designed for precise preset

Additional Features

  • External self reseating relief valve - Not designed to protect downstream equipment (no relief valve is needed on low pressure fuel gas models)
  • Sintered inlet filter - electroless nickel plated bronze


SR 450 Heavy Duty Single Stage
Model SR450D-346
Part  Number 0781-0527
Delivery Range (PSIG) 5-125
Gauge Range Inlet 4000
Gauge Range Outlet 200
CGA Inlet Connection 540
Outlet Connection 5/8" – 18 F LH

Max Inlet Pressure (PSIG)       

Flow Coefficient (Cv) 0.27

Part Number: 0781-0527

SKU:VIC SR450D-540
Victor 0781-0527 SR 450 High Capacity/Heavy Duty Oxygen Regulator

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