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.

Natural Gas Industry


  • Analytically Accurate® Technology
  • Patented multi-stage design
  • Preset, ratio controlled stages with configurable final stage
  • Piston pressure sensing elements
  • 20 micron inlet filter
  • 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


MJTR Cut Sheet


Maximum Allowable Working Pressure6000 psig (414 bar)
Proportional temperature control range
-40ºF-400ºF (500ºF w/ Kalrez) [-40ºC-150ºC (260ºC w/ Kalrez)]
Port sizes
1/4” female NPT
Outlet pressure range0-10, 0-25, 0-50, 0-100, 0-250, or 0-500 psig
(0-0.69, 0-1.72, 0-3.45, 0-6.89, 0-17.24, or 0-34.47 bar)
Wetted materials
Machined parts: 316 stainless steel/NACE compliant
All other metal parts: stainless steel/NACE compliant
O-ring: James Walker
Optional: Viton®/Kalrez (other materials available upon request)