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.

An 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 30oF 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
  • Unique Heat Exchange Chamber
  • Two section design for easy disassembly from heat plate attachment
  • 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 0.009
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)
0-500 (0-34.47 bar)
Input Supply Voltage 115 VAC, 215 Watts, 50/60 Hz, ± 10%
208/230 VAC, 215 Watts, 50/60 Hz, ± 10%
24 VDC, 155 Watts
Seal Options James Walker
other materials available upon request