A list of Frequently Asked Questions and potential solutions are loosely organized below. Click the question to see its answer in the drop-down box. Please use this as a starting point to perform simple maintenance on your own and to better understand your Comco equipment.

If you need further assistance, please call 1-800-796-6626 or 1-818-841-5500 or use the form below to contact our Technical Support Team.

Where can I find a manual for my PowerFlo or DirectFlo?
What is in the PowerFlo/DirectFlo maintenance kits?

The PF2139 DirectFlo/PowerFlo O-ring Kit includes:

  • 2 ST5496 O-rings
  • 1 ST5023 O-ring
  • 1 ST5495 O-ring
  • 1 ST5504 O-ring
  • Instructions

The PF2489 DirectFlo/PowerFlo Maintenance Kit for DF1400/PF2400 models includes:

  • 1 MB1455 connector with Quicknut
  • 1 PF2040 modulator housing assembly
  • 1 MB1483 Quicknut
  • 1 PF2189-2 PowderGate valve seat assembly
  • 1 MB1653 PowderGate nose
  • 1 ST4014 1/4″ T bulkhead union with MB1453 Quicknuts installed
  • 1 ST4184 3/8″ x 1/4″ NPT male connector
  • 1 PF2139 O-ring replacement kit
  • 3 ST4209 3/8″ Tubing ferrule set
  • 6 feet – MB1233 1/4″ abrasive hose
  • 8 feet – PF2083 3/8″ abrasive hose
  • 1 TS309 DF/PF tune-up kit instructions

The PF2190 DirectFlo/PowerFlo Maintenance Kit for DF1200/PF2000 models includes:

  • 1 MB1455 hose connector with Quicknut
  • 1 PF2040 modulator housing assembly
  • 1 PF2090 nozzle nose
  • 1 PF2177 union
  • 1 PF2179 connector
  • 1 ST4014 union bulkhead
  • 1 ST4015 brass tee
  • 1 ST4161 elbow
  • 1 each of ST5023 ST5495 ST5496 and ST5504 O-rings
  • 6 feet of MB1233 1/4″ abrasive hose
  • 8 feet of PF2083 3/8″ abrasive tube
  • Modulator replacement instructions and detailed tune-up kit instructions

What types of nozzles are available?

Our nozzles come in an array of shapes and sizes for a wide range of applications.  The straight, round style nozzle with openings ranging from 0.015″ to 0.125″ meets most application requirements.  Rectangular nozzles are available for applications that require a wide sweep or fan of abrasive.

Comco’s offers long-lasting Hi/Performance nozzles in addition to standard nozzles.  Hi/Performance nozzles deliver an accelerated abrasive flow with a tighter focus, resulting in less overspray.

Read more about Comco Nozzles.

For part numbers and sizes, see: Nozzles and Powder Brochure

How will oil contamination affect my air line?

Initial contamination by oil in your blaster cause irregularities in the abrasive flow.  Abrasive may clump and clog above the orifice in the abrasive tank or in the nozzle.

Oil contamination may cause check-valve failure.  Oil contamination prevents the check-valve from sealing properly, allowing abrasive to pass back into the system.  The aggressive nature of abrasive quickly erodes O-rings and seals on these components, resulting in costly maintenance repairs.  An air dryer equipped with a pre-oil filter helps prevent oil contamination.

Also, be sure to read: Tech Bulletin: Oil Contamination

Why do I see premature wear on my output fitting?

Are you using 3/8″ abrasive hose?

Proper installation for this hose fitting is critical. Installation requires 4 parts: the hose, the output fitting, a nut, and a 2-piece ferrule.

The 3/8″ abrasive hose must be pressed firmly into the output fitting prior to installation. Tighten the nut while holding the hose in place. The ferrule should crimp as the nut is tightened. Any gap between the hose and the output fitting creates turbulence in the abrasive stream and causes the fitting to fail along the side of the junction.

A poorly cut hose triggers quick wear. Check to see if the hose is cut raggedly or at an angle. The hose must be cut straight and clean.

ragged abrasive hose end

INCORRECT: A ragged cut will cause turbulence in the output fitting.


Angle cut abrasive hose

INCORRECT: Cutting the abrasive hose at an angle will result in faster wear at the output fitting.


CORRECT: The hose end should be flat, straight and clean to fit securely in the fitting and reduce wear.


Don’t Just Cut the Hose!

If the hose is already damaged or visibly worn in one spot, even at its end, replace the hose completely. The first noticeable sign of wear is a good indicator that the entire abrasive hose is thinning at other points. Don’t just cut off the visibly worn area and use the remainder of the hose. You risk turning your workstation and shop into a sudden snowglobe.


Need further assistance?

If you are unable to resolve this or any issue, contact our Tech Support Specialists at 1-800-796-6626 or techsupport@comcoinc.com.

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