Back To Top
TESCOM™ Gas Pressure Regulator
449-254 Series high purity, high flow pressure reducing regulators are ideal for high pressure bulk specialty gas delivery systems (BSGS).
The 449-254 Series offers a Cv = 1.0, surface finish of 10 Ra and is available with Hastelloy® trim. Inlet pressure is 1500 psig / 103 bar with outlet pressures up to 400 psig / 27.6 bar.
TESCOM™ Gas Pressure Regulator


Pressure Rating
Maximum Inlet Pressure: 1500 psig / 103 bar
Outlet Pressure Range: 25-400 psig / 1.7-27.6 bar
Body: 316L VAR Stainless Steel
Diaphragm: Elgiloy®
Trim: Hastelloy®
Valve: Hastelloy®
Operating Temperature
-40°F to 140°F / -40°C to 60°C
Port Size & Type
1/4 Male Swivel (High Flow)
1/4 Female Swivel (High Flow)
1/2 Male Swivel
1/2 Female Swivel
1/2 Tube Stubs
Flow Capacity
Cv = 1.0
3.5 lbs / 1.6 kg
Additional Information
For custom modifications or a complete system solution, please contact your local sales office.


  • Exclusively designed to handle the demands of high purity bulk specialty gas delivery systems
  • Its proven design, high outlet capabilities, bubble-tight shutoff valve and standard Hastelloy®┬átrim provides dependability required for demanding regulator applications
  • Metal-to-metal sealed diaphragm
  • Cv = 1.0 with 10 Ra microinch finish on wetted surfaces
  • Meets SEMI F19 and SEMI Modular Interface specifications