Mustang® Joule-Thomson Heated Regulator

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

A MJTHR located downstream of a sample probe permits a 4-stage pressure reduction without distorting the composition of a vapor sample. Gas sample integrity is maintained by heating it to at least 30°F above the expected hydrocarbon dew point.

When used in combination with insertion probes, the MJTHR is the most practical means for conforming to the API 14.1 and GPA 2166 standards.


  • Temperature Controller in Class 1, Division 1 & 2, or Zone 1 Exd Enclosure
  • Proportional-Integral-Derivative (PID) controller
  • Patented multi-stage design
  • Preset, ratio controlled stages with user adjusted final stage
  • Piston pressure sensing elements
  • 20 micron inlet filter
  • Temperature Controller in Class 1 Division 1 & 2 Enclosure
  • Unique Heat Exchange Chamber
  • Adjusting Screw w/ 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


  • cETLus Certified
  • Atex/IECEx Certified


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
Wetted materials Machined parts: 316 stainless steel/NACE compliant
All other metal parts: stainless steel/NACE compliant
Conduit connection 3/4” female NPT
Internal volume 5 cc
Cv Coefficient 0.06
Thermal cut-off Normally opens at 284°F (140°C)
(other ranges available upon request)
Electrical enclosure classification Class 1, Division 1 & 2, Groups B, C, D
Controller Options Watlow®
Oven Industries
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)
0-1000 (0-34.47 bar)
Power rating options 115 VAC, 200 Watts, 50/60 Hz, ± 10%
208/230 VAC, 200 Watts, 50/60 Hz, ± 10%
24 VDC, 140 Watts
Seal Options James Walker
other materials available upon request