Why does my dust collector have insufficient airflow?

There are many reasons you could be seeing insufficient airflow in your dust collection system. Let's break down those reasons below.

• Fan rotation backwards - Compare rotation to the blower manufacturers rotation arrow. Check that all access doors are in place and secured. Check that the hopper discharge opening is sealed and the optional attachments are installed correctly.
• Exhaust fan area restricted - Check fan exhaust area for obstructions. Remove material or debris. Adjust fan outlet damper if equipped.
• Filter cartridges need replaced. - If the differential pressure of the collector has reached five, it's time to start considering replacing the filters. 
• Lack of compressed air - Check that a minimum of 75-psig is available. See compressed air installation.
• Pulse cleaning not energized - Use a voltmeter to check supply voltage to the timer board. Check and replace the fuse on the timer board if necessary.
• Dust discharge container overflowed or plugged - Clean out the dust storage container.
• Pulse valves leaking compressed air - Lock out all electrical power to the unit and bleed the compressed air supply. Check for debris, valve wear, or diaphragm failure by removing the diaphragm cover on the pulse valves. Check for solenoid leaks or damage. Check for leaks in the tubing from the pulse valve to the solenoid valves. Replace as necessary.
• Solid state timer failure - Using a voltmeter, check supply voltage to the timer board. Check and replace the fuse on the timer board if necessary. If the fuse is good and input power is present, but output voltage to the solenoid valves is not, replace the timer board.
• Display on ∆P doesn't return to zero when at rest. Recalibrate DCP pressure module with pressure tubing attached as described in timer controller installation.