Many of Equilibar’s Research Series back pressure regulators can be fitted with SS316 diaphragms, which extend the pressure range up to 10,000 psig / 689 bar(g), while also pushing the operating temperature range up to that of Kalrez® O-rings (300°C, 527°F).
While Equilibar’s PTFE/Glass composite diaphragms can be used up to 232°C (450°F) at low pressures, the mechanical stress derating for PTFE at elevated temperatures makes the SS316 diaphragm a more practical choice in most high temperature applications. Diaphragms made of Hastelloy C276 are also available for some scenarios.
HT Series Extends Temperature to 450°C
Equilibar’s HT Series back pressure regulators utilize a graphite seal for temperatures to 450°C and pressures to 5000 psig / 344 bar(g). The Grafoil GTA seal is nuclear grade purity (99.9% graphite).
C-seal Metal O-rings Can Accommodate Temperatures to 700°C in Certain Applications
High Temperature back pressure regulators are now also available with C-seal metal O-rings. Using these metal seals in combination with full metal diaphragms extends the capability of the back pressure regulator to 700°C at a maximum pressure rating of 70 bar. If your application requires higher pressure we can still provide solutions up to 400 bar with a temperature limit of 600°C and up to 680 bar at 550°C.
Contact our engineers for more information on your high temperature application.
Kalrez® is a registered trademark of DuPont Performance Elastomers
High Temperature HT1 Series
The HT Series uses graphite seals and is capable of temperatures up to 450°C.