Dwyer 38R User Manual

Series 38RSelf-Operating Temperature RegulatorsOperation, Installation & Maintenance ManualIndicating and Non-indicatingActuator Option 2 ShownBul

Series 38R ••• Self-Acting Temperature Control ValvesOperation, Installation & Maintenance ManualPage 10CHECKING THE REGULATOR FOR PROPER ACTION

Series 38R ••• Self-Acting Temperature Control ValvesOperation, Installation & Maintenance ManualCHECKING THE REGULATOR FOR PROPER ACTION (conti

Figure 3 Figure 4 Figure 5Series 38R ••• Self-Acting Temperature Control ValvesOperation, Installation & Maintenance ManualPage 127. The Valve

REPLACING Valve Body Assembly1. Unless already completed, install two locknuts onto valve stem.A) Thread locknuts loosely onto the valve stem.B) Push

Series 38R ••• Self-Acting Temperature Control ValvesOperation, Installation & Maintenance ManualREVERSING THE VALVE ACTIONPage 14Direct-Acting

REVERSING THE VALVE ACTION (continued)Series 38R ••• Self-Acting Temperature Control ValvesOperation, Installation & Maintenance ManualPage 15Pr

Page 16Series 38R ••• Self-Acting Temperature Control ValvesOperation, Installation & Maintenance Manual3 WAY-REGULATORS – Installation & Ma

Page 17Option 3 “FAIL-SAFE” – Installation & MaintenanceThe valve body assemblies on these models are identical to thosepreviously described and t

Series 38R ••• Self-Acting Temperature Control ValvesOperation, Installation & Maintenance ManualPage 18TYPICAL APPLICATIONSTypical Heat Exchang

Typical Plating or Pickling Application Using a Self-Operating Temperature RegulatorSeries 38R ••• Self-Acting Temperature Control ValvesOperation,

Operation, Installation & Maintenance ManualSeries 38R ••• Self-Operating RegulatorsOperation, Installation & Maintenance ManualPage 2Princi

Series 38R ••• Self-Acting Temperature Control ValvesOperation, Installation & Maintenance ManualPage 20TROUBLE SHOOTING GUIDEPROBLEM: ERRATIC C

Series 38R ••• Self-Acting Temperature Control ValvesOperation, Installation & Maintenance ManualPage 21TROUBLE SHOOTING GUIDEPROBLEM: TEMPERATU

Page 22Notes(Adjustments, Stem Dimensions, Maintenance Logs)

Page 23Notes(Adjustments, Stem Dimensions, Maintenance Logs)

Dwyer Instruments Inc.P.O. Box 373 Michigan City, IN 46361PH: 1-219-879-8000Fax: 1-219-872-9057

Series 38R ••• Self-Acting Temperature Control ValvesOperation, Installation & Maintenance ManualPRINCIPLES OF OPERATION OF THE REGULATORThe W.E

Series 38R ••• Self-Acting Temperature Control ValvesOperation, Installation & Maintenance ManualPage 4MAXIMUM PSI DROP THRU VALVE, PSI (bar)Ind

Series 38R ••• Self-Acting Temperature Control ValvesOperation, Installation & Maintenance ManualPage 5INSTALLATIONDeciding the LOCATION for the

Series 38R ••• Self-Acting Temperature Control ValvesOperation, Installation & Maintenance ManualPage 6SENSING BULBSENSING BULB LOCATIONThe loca

Series 38R ••• Self-Acting Temperature Control ValvesOperation, Installation & Maintenance ManualPage 7Using the supplied 1/4” rod, turn the 13/

Series 38R ••• Self-Acting Temperature Control ValvesOperation, Installation & Maintenance ManualPage 8ROUTINE SERVICESince this instrument is s

Series 38R ••• Self-Acting Temperature Control ValvesOperation, Installation & Maintenance ManualPage 9STEM SEAL PACKINGThe regulator uses PTFE