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 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.

Natural Gas Industry


  • Analytically Accurate® Technology
  • Temperature Controller in Class 1, Div 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 1Div 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 MJTHR Cut Sheet
ATEX/IECEx Certified MJTHR Cut Sheet


Maximum Allowable Working Pressure6000 psig (414 bar)
Temperature Range-15ºF (-26ºC) to 300ºF (149ºF)
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)
Thermal cut-off
Normally opens at 230ºF (110ºC) (other ranges available upon request)
Internal volume
5 cc
Cv Coefficient
Port sizes
1/4” female NPT
Conduit connection
3/4” female NPT
Electrical enclosure classification
Class 1, Div 1 & 2, Groups B, C, D
Power rating options
115 VAC, 200 Watts, 50/60 Hz, ± 10%
208 VAC, 200 Watts, 50/60 Hz, ± 10%
230 VAC, 200 Watts, 50/60 Hz, ± 10%
24 VDC, 140 Watts
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)