Material backs up in controls; even clogs the moisture trap. Sometimes the pop-up sticks up.

MATERIAL BACKS UP IN CONTROLS: EVEN CLOGS THE MOISTURE TRAP. SOMETIMES THE POP-UP STICKS.

NORMALLY CAUSED BY BACK FLOW THAT IS A RESULT OF ONE OR MORE OF THE FOLLOWING MOST COMMON OCCURANCES:

1. TURNING OFF THE COMPRESSOR: DO NOT TURN THE COMPRESSOR OFF WHILE THE BLASTER IS UNDER PRESSURE. DOING SO WILL ALLOW THE VESSLE TO DEPRESSURIZE THROUGH THE AIR SUPPLY HOSE.
2. THE COMPRESSOR IS NOT DEDICATED TO THE BLASTER: DURING PEAK USES DURING THE DAY WHEN OTHER AIR TOOLS ARE BEING USED, THE COMPRESSOR IS NOT LARGE ENOUGH TO HANDLE THE ADDITIONAL DEMAND OF CFM CREATING A DROP IN THE SUPPLY AIR AND BACKWARD FLOW OF AIR FROM VESSEL.
3. IN THE CASE WHEN A LARGE NOZZLE (#8 +) OR MULTIPLE NOZZLES/OUTLETS ARE BEING USED: WITH A MARGINALLY SIZED COMPRESSOR, WHEN THE DEADMAN IS DEPRESSED, THE COMPRESSOR WILL DROP FOR A COUPLE OF SECONDS UNTIL IT BUILDS MOMENTUM BACK UP AND EQUALIZES THE PRESSURE. DURING THAT MOMENT OF DROP IN SUPPLY AIR COULD ALSO CONTRIBUTE TO DUST MIGRATION BACK INTO THE CONTROL LINES.
4. ADDITIONAL INFO REGARDING MATERIAL BACK UP IN CONTROLS, ETC.: STILL CAUSED FROM BACK FLOW AND TRAVELING THOUGH THE STRAINER VIA CONTAMINATED CONTROL HOSES. PLEASE REMEMBER TO CLEAN ALL CONTROL HOSES BY DETACHING AND BLOWING THEM OUT AFTER YOUR BACK FLOW ISSUES HAVE BEEN ADDRESSED. ONCE THE HOSES ARE CONTAMINATED, DUST AND ABRASIVE WILL REMAIN TRAPPED IN THE HOSES THAT WILL PASS THROUGH THE CONTROL VALVE UNLESS THEY ARE CLEARED.
5. POP UP ADJUSTMENT: THERE ALSO HAVE BEEN SOME CASES WHERE THE INTERNAL VERTICAL PIPE HOLDING THE POP UP HAS BEEN REPLACED OR CUT SHORTER. THE BELIEF IS THAT THE VESSEL REFILLS QUICKER BY CREATING A LARGER GAP BETWEEN THE GASKET AND POP UP HEAD. THIS IS INCORRECT. THERE SHOULD ONLY BE A GAP BETWEEN 5/8" AND 3/4" BETWEEN THE POP UP HEAD AND GASKET. REFER TO SECTION 5.1 OF THE ABRASIVE BLASTERS OWNERS MANUAL. IF THE POP HEAD IS TOO LOW, WHEN THE VESSEL IS UNDER PRESSURE, THE DISTANCE BETWEEN THE POP HEAD AND VERTICAL PIPE IS TOO GREAT THAT CAN ALLOW MATERIAL TO FALL INTO THE PIPE MIGRATING BACK TO THE CONTROL LINES.

SOLUTIONS:

1. DEDICATED COMPRESSOR: PROPERLY SIZED DEDICATED COMPRESSOR FOR THE BLASTER. ENSURE AIR HOSE TO SUPPLY BLASTER IS LARGE ID TO ACCOMDATE NOZZLE SIZE. REFER TO THE AXXIOM BLASTING DATA SECTION 13 OF THE ABRASIVE BLASTERS MANUAL FOR PROPER CFM AND HOSE REQUIREMENTS.
2. REDUCE OR REPLACE WORN NOZZLE: IF # 1 IS NOT AN OPTION.
3. CLEAR CONTAMINATED CONTROL HOSES/TWINLINES: IT MAY BE NECESSARY TO REPLACE HOSES AS NECESSARY.
3. IN SITUATIONS AS SUGGESTED IN NUMBER 3: AXXIOM HAS DEVELOPED A PATENT PENDING DEVICE CALLED A GRIT SUPRESSION VALVE (GSV): THE GSV IS DESIGNED TO SLOW THE BACKFLOW PRESSURE DOWN WHILE STILL ALLOWING THE VESSEL PRESSURE TO EQUALIZE. SLOWING THE BACK FLOW PREVENTS THE MAJORITY OF DUST PARTICLES BEING CARRIED. IT IS EASILY INTALLED BETWEEN THE INTERNAL VERTICAL PIPE HOLDING THE POP UP WITH STEM AND THE 90 DEGREE FITTING.

Thank you for your inquiry,

Axxiom Sales Staff

Axxiom Manufacturing Inc
1.800.231.2085
Fresno, TX

Copyright 2008 Axxiom Manufacturing, Inc.
Axxiom Manufacturing, Inc. is the exclusive manufacturer of Schmidt products. Certain products manufactured by Axxiom Manufacturing Inc are protected by patents pending in the United States and other countries. Axxiom, MV, MV2 and Microvalve are trademarks and Schmidt, the stylized "S", Combovalve and Thompson Valve are registered trademarks of Axxiom Manufacturing, Inc. All rights reserved.

#1 \| Posted: 6 May 2008 22:04 \| Reply One of the common causes of this is turning off compressor while pot pressurizing. Another reason is an undersized compressor. Thank you for your inquiry, Axxiom Engineering Staff Axxiom Manufacturing Inc 1.800.231.2085 Fresno, TX Copyright 2008 Axxiom Manufacturing, Inc. Axxiom Manufacturing, Inc. is the exclusive manufacturer of Schmidt products. Certain products manufactured by Axxiom Manufacturing Inc are protected by patents pending in the United States and other countries. Axxiom, MV, MV2 and Microvalve are trademarks and Schmidt, the stylized "S", Combovalve and Thompson Valve are registered trademarks of Axxiom Manufacturing, Inc. All rights reserved.	Andrew Guest
#2 \| Posted: 30 Jul 2008 09:16 \| Reply How does an undersized compressor contribute to this problem?	Guest
#3 \| Posted: 18 May 2010 10:41 \| Reply MATERIAL BACKS UP IN CONTROLS: EVEN CLOGS THE MOISTURE TRAP. SOMETIMES THE POP-UP STICKS. NORMALLY CAUSED BY BACK FLOW THAT IS A RESULT OF ONE OR MORE OF THE FOLLOWING MOST COMMON OCCURANCES: 1. TURNING OFF THE COMPRESSOR: DO NOT TURN THE COMPRESSOR OFF WHILE THE BLASTER IS UNDER PRESSURE. DOING SO WILL ALLOW THE VESSLE TO DEPRESSURIZE THROUGH THE AIR SUPPLY HOSE. 2. THE COMPRESSOR IS NOT DEDICATED TO THE BLASTER: DURING PEAK USES DURING THE DAY WHEN OTHER AIR TOOLS ARE BEING USED, THE COMPRESSOR IS NOT LARGE ENOUGH TO HANDLE THE ADDITIONAL DEMAND OF CFM CREATING A DROP IN THE SUPPLY AIR AND BACKWARD FLOW OF AIR FROM VESSEL. 3. IN THE CASE WHEN A LARGE NOZZLE (#8 +) OR MULTIPLE NOZZLES/OUTLETS ARE BEING USED: WITH A MARGINALLY SIZED COMPRESSOR, WHEN THE DEADMAN IS DEPRESSED, THE COMPRESSOR WILL DROP FOR A COUPLE OF SECONDS UNTIL IT BUILDS MOMENTUM BACK UP AND EQUALIZES THE PRESSURE. DURING THAT MOMENT OF DROP IN SUPPLY AIR COULD ALSO CONTRIBUTE TO DUST MIGRATION BACK INTO THE CONTROL LINES. 4. ADDITIONAL INFO REGARDING MATERIAL BACK UP IN CONTROLS, ETC.: STILL CAUSED FROM BACK FLOW AND TRAVELING THOUGH THE STRAINER VIA CONTAMINATED CONTROL HOSES. PLEASE REMEMBER TO CLEAN ALL CONTROL HOSES BY DETACHING AND BLOWING THEM OUT AFTER YOUR BACK FLOW ISSUES HAVE BEEN ADDRESSED. ONCE THE HOSES ARE CONTAMINATED, DUST AND ABRASIVE WILL REMAIN TRAPPED IN THE HOSES THAT WILL PASS THROUGH THE CONTROL VALVE UNLESS THEY ARE CLEARED. 5. POP UP ADJUSTMENT: THERE ALSO HAVE BEEN SOME CASES WHERE THE INTERNAL VERTICAL PIPE HOLDING THE POP UP HAS BEEN REPLACED OR CUT SHORTER. THE BELIEF IS THAT THE VESSEL REFILLS QUICKER BY CREATING A LARGER GAP BETWEEN THE GASKET AND POP UP HEAD. THIS IS INCORRECT. THERE SHOULD ONLY BE A GAP BETWEEN 5/8" AND 3/4" BETWEEN THE POP UP HEAD AND GASKET. REFER TO SECTION 5.1 OF THE ABRASIVE BLASTERS OWNERS MANUAL. IF THE POP HEAD IS TOO LOW, WHEN THE VESSEL IS UNDER PRESSURE, THE DISTANCE BETWEEN THE POP HEAD AND VERTICAL PIPE IS TOO GREAT THAT CAN ALLOW MATERIAL TO FALL INTO THE PIPE MIGRATING BACK TO THE CONTROL LINES. SOLUTIONS: 1. DEDICATED COMPRESSOR: PROPERLY SIZED DEDICATED COMPRESSOR FOR THE BLASTER. ENSURE AIR HOSE TO SUPPLY BLASTER IS LARGE ID TO ACCOMDATE NOZZLE SIZE. REFER TO THE AXXIOM BLASTING DATA SECTION 13 OF THE ABRASIVE BLASTERS MANUAL FOR PROPER CFM AND HOSE REQUIREMENTS. 2. REDUCE OR REPLACE WORN NOZZLE: IF # 1 IS NOT AN OPTION. 3. CLEAR CONTAMINATED CONTROL HOSES/TWINLINES: IT MAY BE NECESSARY TO REPLACE HOSES AS NECESSARY. 3. IN SITUATIONS AS SUGGESTED IN NUMBER 3: AXXIOM HAS DEVELOPED A PATENT PENDING DEVICE CALLED A GRIT SUPRESSION VALVE (GSV): THE GSV IS DESIGNED TO SLOW THE BACKFLOW PRESSURE DOWN WHILE STILL ALLOWING THE VESSEL PRESSURE TO EQUALIZE. SLOWING THE BACK FLOW PREVENTS THE MAJORITY OF DUST PARTICLES BEING CARRIED. IT IS EASILY INTALLED BETWEEN THE INTERNAL VERTICAL PIPE HOLDING THE POP UP WITH STEM AND THE 90 DEGREE FITTING. Thank you for your inquiry, Axxiom Sales Staff Axxiom Manufacturing Inc 1.800.231.2085 Fresno, TX Copyright 2008 Axxiom Manufacturing, Inc. Axxiom Manufacturing, Inc. is the exclusive manufacturer of Schmidt products. Certain products manufactured by Axxiom Manufacturing Inc are protected by patents pending in the United States and other countries. Axxiom, MV, MV2 and Microvalve are trademarks and Schmidt, the stylized "S", Combovalve and Thompson Valve are registered trademarks of Axxiom Manufacturing, Inc. All rights reserved.	admin Admin

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Material backs up in controls; even clogs the moisture trap. Sometimes the pop-up sticks up.