Spence Type ET124/ET134 temperature and pressure regulator has a variety of uses. Designed specially for; Instantaneous Heaters, Jacketed Kettlers, Storage Heaters, Oil Heaters, Batch Heating, Process Heating, Vats, Drivers and Ovens. Available in Cast Iron or Steel materials, type ET124 and ET134 can regulate heater operating pressure between 20 and 125(ET124 only). Type E2T134 can regulate heating operating pressures up to 15 PSI.