Size a blow-off valve (BOV/bypass valve) to relieve compressor surge pressure during throttle lift-off events.
Input Parameters
Results
--
Charge Pipe Area
in²
--
Required Valve Area
in²
--
Min Valve Diameter
mm
--
Relief Pressure
psi
Note: BOV should vent at least 65% of charge pipe area to prevent compressor surge. Recirculating valves maintain AFR on MAF-based systems.
Reference
Pipe Area = pi x (ID/2)^2
Required Valve Area = Pipe Area x 0.65 (piston/diaphragm)
Required Valve Area = Pipe Area x 0.55 (dual-port)
Min Valve Diameter = sqrt(4 x Area / pi)
Relief Pressure = Boost - Spring Preload