Attention:

Certain features of sigmaaldrich.com will be down for maintenance Saturday afternoon/evening, February 24th starting at 3:00 pm CT until 9:00 pm CT.

Please note that you still have telephone and email access to our local offices. We apologize for any inconvenience.

Gas Cylinder Pressure Regulators

Most GC systems require that the pressure is regulated between the source (gas cylinder or gas generator) and the instrument. Select a pressure regulator based on the application:

  • 2-Stage Gas Cylinder Regulators: Reduce pressure in two steps, enabling the regulator to uniformly control the output pressure despite the decreasing input pressure from the gas cylinder. An in-line regulator is typically not required downstream. Choose a 2-stage regulator when the gas cylinder is within 10 feet of the instrument. 3000 psig maximum inlet pressure
  • 1-Stage Gas Cylinder Regulators: Reduce pressure in a single step. Some pressure change can occur downstream as the gas cylinder pressure drops. Choose a 1-stage regulator when the gas cylinder is greater than 10 feet from the instrument. Then install an in-line regulator within 10 feet of the instrument. 3000 psig maximum inlet pressure.
We offer several versions of gas cylinder pressure regulators to serve a wide variety of needs.
High Purity
  • Check valve in inlet; keeps air from entering during cylinder change-out
  • Bar stock nickel-plated brass body with small internal volume; purges quickly
  • Smooth internal cavity; efficient gas flow
  • Stainless steel diaphragm with captive PTFE seal; appropriate for most applications
  • Nickel-plated zinc bonnets
  • 2 1/2 in. diameter nickel-plated brass gauges; easy to read
  • Needle shut-off valve at body outlet; keeps air from entering during changeout of downstream components
  • 1/8 in. stainless steel male Swagelok fitting at valve outlet; ready for use with copper or stainless steel tubing
High Purity Plus
  • Check valve in inlet; keeps air from entering during cylinder change-out
  • Bar stock nickel-plated brass body with small internal volume; purges quickly
  • Smooth internal cavity; efficient gas flow
  • Stainless steel diaphragm with captive PTFE seal; appropriate for most applications
  • Nickel-plated zinc bonnets
  • 2 1/2 in. diameter nickel-plated brass gauges; easy to read
  • Diaphragm shut-off valve at body outlet; keeps air from entering during change-out of downstream components; higher leak integrity than needle valve
  • 1/8 in. stainless steel male Swagelok fitting at valve outlet; ready for use with copper or stainless steel tubing
Ultra High Purity
  • Check valve in inlet; keeps air from entering during cylinder change-out
  • Bar stock nickel-plated brass body with small internal volume; purges quickly
  • Smooth internal cavity; efficient gas flow
  • Stainless steel diaphragm with metal-to-metal seal; impervious for the most sensitive applications
  • Machined brass bonnets; used for panel-mount applications
  • 2 1/2 in. diameter nickel-plated brass gauges; easy to read
  • Diaphragm shut-off valve at body outlet; keeps air from entering during change-out of downstream components; higher leak integrity than needle valve
  • 1/8 in. stainless steel male Swagelok fitting at valve outlet; ready for use with copper or stainless steel tubing