About the H3P back pressure regulators

Cv: 1·E-08 to 0.07  |  Max. Temperature: 300°C  |  Max. Pressure: 206 barg (3000 PSI)


Equilibar® H3P units are designed to hold a stable pressure up to 206 bar (3000 PSI). It is certainly one of the most popular models. The robust design contains four inlet and two outlet orifices, making it an excellent choice in many research applications. In contrast to other back pressure regulators, these units can handle liquids, gasses, supercritical media, two-phase flow and, within certain limits, even three-phase flow.

Check out the explanation of the Low-Flow series in this video.


The flexible diaphragm ensures that the orifices have a good seal, resulting in great low flow performance. These units often achieve a flow turndown ratio of 1:100.000.

These units are available for applications up to 300°C, if they have Kalrez o-rings and metal or polyimide diaphragms.


Do you want to know more about this product?

The working of an Equilibar Dome Loaded Back Pressure Regulator

How to Rebuild your Equilibar Back Pressure Regulator

Different materials that are used to make Equilibar Back Pressure Regulators and diaphragms

Pressure control across ultra wide flow rate range

Two Phase Flow Pressure Regulator