Mustang® Joule-Thomson Regulator

The Mustang® Joule-Thomson Regulator (MJTR®) is a four-stage pressure regulator designed to compensate for Joule-Thomson cooling during sample extraction. With a ratio controlled multi-piston design, the MJTR ensures the first three stages are always functional, even with fluctuations to the inlet pressure.

The MJTR can be utilized in any application requiring multi-stage pressure regulation for sample conditioning or calibration gas cylinders. An MJTR, located downstream of a sample probe, permits a 4-stage reduction in pressure without distorting the composition of a vapor sample.

When used in combination with insertion probes, the MJTR provides the most practical method for conforming to the API 14.1 and GPA 2166 standards.


  • Patented multi-stage design
  • Preset, ratio controlled stages with configurable final stage
  • Piston pressure sensing elements
  • 20 micron inlet filter
  • Two section design for easy disassembly from heat plate attachment
  • Adjusting screw with lock nut


  • Offsets Joule-Thomson cooling providing continuous gas sample conditioning
  • Protects analyzers & helps preserve sample integrity
  • Prevents condensation
  • Minimizes regulator freeze ups
  • Eliminates the need for multiple regulators in series
  • Maintains outlet pressure during large inlet pressure swings
  • Easy to mount in small or densely populated enclosures


Maximum allowable working pressure 6000 psig (414 bar)
Temperature range -15°F (-26°C) to 300°F (149°C)
Port sizes 1/4” female NPT
Cv 0.023
Wetted materials Machined parts: 316 stainless steel/NACE compliant
All other metal parts: stainless steel/NACE compliant
Outlet pressure range options 0-10 (0-0.69 bar)
0-25 (0-1.72 bar)
0-50 (0-3.45 bar)
0-100 (0-6.89 bar)
0-250 (0-17.24 bar)
0-500 (0-34.47 bar)
Seal Options James Walker
other materials available upon request