The Model 20BP is a back-pressure pneumatic booster/regulator variant of the standard Model 20 line, designed specifically to handle back-pressure or relief operations in pressurised systems or tank systems rather than only forward/exhaust flow. For example, the specification sheet lists it as “Back Pressure Pneumatic Booster (M20BP)” capable of up to 150 psig [10.0 bar] signal pressure and up to 250 psig [17.0 bar] system/back pressure, with a flow capacity of about 45 SCFM (76.5 m3/hr) and an approximate Cv of 1.0.

Because the “BP” version is tailored for back-pressure control, it is a preferred choice when your system requires maintaining or controlling pressure upstream or in relief mode rather than simply boosting a low‐flow signal to a higher output pressure. This difference is important for industrial automation, process control, oil & gas, water/wastewater, or tank‐back-pressure systems.

To select and install the Model 20BP correctly, you should first determine your system’s signal pressure (what drives the device), the back‐pressure you need to regulate (what the device will hold or relieve), and the flow volume (how much air/gas passes through). The BP variant is designed for back-pressure or relief use, so ensure your application needs that mode. Next, confirm the port size, thread type, connection requirements, and any optional features (such as bypass needle valves or tapped exhaust) that might be required in your system. Installation best practices include mounting the device in a location where piping is clean and dry, with minimal vibration and proper venting/exhaust if required. Ensure the signal line is free of contamination, the supply/actuation lines are correctly sized, and maintain accessibility for servicing (since this model allows servicing without removal).

If your piping or flow requirements exceed the 45 SCFM rating, or your pressure ratio/back‐pressure requirement is outside the published limits, consider other models in the same family.