INDUSTRIAL SILENCERS

Intermittent 15000 to 20000 FPM
Continuous 10000 to 15000 FPM
Max. Allowable 20000 FPM

Rotary Positive Blower
5500 to 6500

Fan 
Max. pressure drop 2 to 4" w.c.     4000 to 7500 FPM

Vacuum Pump Separators
4000 to 6000 FPM

Steam Ejectors
Match connection size of discharge
Max. pressure drop 5 to 10" w.c.    4000 to 8000 FPM

Vent & Blowdown to atmosphere

Single acting 2000 to 3000 FPM
Double acting 4000 to 5000 FPM

Centrifugal Compressor
Maximum pressure drop  2" to 4" w.c.  3000 to 7500 FPM
Reciprocating Compressor Intake

Low speed (< 350 RPM) 4000 to 7000 FPM
Medium speed (350 to 1200 RPM) 6000 to 9000 FPM
High speed (> 1200 RPM) 8000 to 10,000 FPM
Turbo charged (All RPM’s) 5000 to 10,000 FPM
Max. allowable 12,000 FPM

Engine Exhaust

4-cycle 4000 to 6000 FPM
2-cycle 4000 to 6000 FPM

Optimize velocity limit, nominal size selection and allowable pressure drop.
Engine Intake

Recommended Velocity Limits ​