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© 2013 Axxiom Manufacturing, Inc. 

 

3.11  Pressure Relief Valve Installation

 

Do Not operate this equipment without a pressure relief device installed to protect the blaster 
pressure vessel from over-pressurization. The ASME Code requires that all vessels be operated 
with pressure relief devices in place. 

 

If the compressed air system does not provide for the installation of a pressure relief valve one 
can  be  installed  on  the  blowdown  port  on  the  pressure  vessel.  Refer  to  Figure  3.11  for  an 
alternate location of the air pressure relief valve. 

 

Local  regulations  set  the  specifications  for  pressure  relief  valves;  therefore,  it  is  the 
responsibility of the owner of the abrasive blaster to install a pressure relief valve that meets 

all

 

applicable  regulations.  The  pressure  relief  device  must  be  set  at  the  maximum  allowable 
working pressure of the abrasive blaster pressure vessel See the ASME/CE vessel nameplates 
attached to the pressure vessel. 

 

 

Rupture Hazard. Operating the pressure vessel above the maximum allowable working pressure 
can result in rupturing the pressure vessel. Install an air pressure relief valve to protect against 
over pressurization of the blast vessel. 

 

 

Airborne particles and loud noise hazards from relief valve exhaust air can cause serious injury 
and loss of hearing. Wear approved eye and ear protection. Stay clear of exhaust air path. DO 
NOT place hands or other body parts in the exhaust air path. Make sure no personnel are in the 
exhaust air path. Direct the relief valve exhaust away from work area. 

 

 

     Figure 3.11 – Suggested location for air pressure relief valve 

Содержание SCHMIDT

Страница 1: ...MANUAL AND MAKE AVAILABLE TO ALL USERS OF THIS EQUIPMENT Manual Part Number 7200 265 Available for downloading from schmidtabrasiveblasting com AXXIOM Manufacturing Inc 11927 S Highway 6 Fresno Texas...

Страница 2: ...r vessel before loading abrasive or performing any maintenance 6 Do Not use abrasives containing free silica Silica can cause silicosis or other related respiratory damage All operators must wear pers...

Страница 3: ...fer to them as needed while reading this manual Term Definition Pressure Vessel A fabricated tank or reservoir that is part of the abrasive blaster which is filled with compressed air and abrasive Als...

Страница 4: ...s will cause serious injury or death Depressurize vessel prior to performing any maintenance See Section 6 2 4 1 7031 057 Warning Read manual before using this machine Read and understand operator s m...

Страница 5: ...5 2013 Axxiom Manufacturing Inc 5 7031 077 6 7034 001 Figure 0 1 b Warning decal summary continued...

Страница 6: ...6 2013 Axxiom Manufacturing Inc...

Страница 7: ...nal Protective Equipment 18 4 0 Abrasive Blast System General Operation 24 5 0 Mini Blast System General Operation 25 6 0 Pre operation Procedures 31 7 0 Operating Instructions 34 8 0 Maintenance and...

Страница 8: ...SERIOUS INJURY OR DEATH TO OPERATING PERSONNEL OR PERSONS IN THE OPERATING VICINITY 1 2 KNOW YOUR EQUIPMENT Do Not operate this equipment in a manner other than its intended application see Section 4...

Страница 9: ...1910 134 Abrasive blasting produces dust which may contain silica and other toxic substances that can cause severe and permanent lung damage cancer and other serious diseases if inhaled All operators...

Страница 10: ...en you are tired or fatigued Use caution and common sense while operating and or performing maintenance on this equipment 1 12 DO NOT USE DRUGS ALCOHOL or MEDICATION Do Not operate this equipment whil...

Страница 11: ...ate this equipment in a condition that may cause failure of the pressure vessel See sections 1 22 through 1 32 below An abrasive blaster is a Pressurized Vessel Alterations damage or misuse of the pre...

Страница 12: ...acility Contact Axxiom Manufacturing Inc for technical support See Section 8 0 1 30 CHECK FOR LEAKS IN VESSEL Do Not operate this equipment if there is a leak in the pressure vessel If leaking take ou...

Страница 13: ...ses All blast hose couplings and air hose couplings have pin holes that must be safety pinned to protect against accidental disconnections Accidental hose disconnection can cause serious injury or dea...

Страница 14: ...by any point other than the lifting eyes or designated lift points Do Not lift the blast vessel while it is pressurized See Section 2 6 1 44 DO NOT TRANSPORT BLAST EQUIPMENT LOADED WITH ABRASIVE Do No...

Страница 15: ...s See the lifting diagrams shown in Section 2 6 2 1 5 For further information on options and accessories available for Schmidt abrasive blasters visit the Axxiom website or contact us Axxiom Manufactu...

Страница 16: ...by a reputable shop holding a National Board R Stamp and or an ASME U stamp depending on state or city law Welding on the vessel performed by welders not properly qualified per the ASME Code may void...

Страница 17: ...17 2013 Axxiom Manufacturing Inc Figure 2 6 Mini Abrasive Blaster Lifting Diagram...

Страница 18: ...in the bottom legs These holes can be used for securing the blaster to the floor or mounting structure 3 2 Compressed Air Requirements blast nozzle The blast nozzle size and blast pressure determine t...

Страница 19: ...g air regulator Air pressure backflow will carry abrasive from the blast vessel and contaminate the blast control system CRITICAL Any inlet air valve or air pressure regulator added to the system must...

Страница 20: ...ng personnel Always use abrasives containing less than 1 of crystalline silica Always use a NIOSH approved respirator when handling loading and cleaning up abrasives Organic substances which are combu...

Страница 21: ...d to each operator Reference 29 CFR 1910 Subpart I OSHA requires that this equipment meet or be equivalent to standards developed by the American National Standards Institute ANSI Figure 3 10 below id...

Страница 22: ...a pressure relief valve that meets all applicable regulations The pressure relief device must be set at the maximum allowable working pressure of the abrasive blaster pressure vessel See the ASME CE v...

Страница 23: ...rements Air supply connection install air supply piping or connect an air supply hose that is the same size as the blaster piping size or larger See Section 3 4 for details Air quality install moistur...

Страница 24: ...the air compressor Since moisture creates problems in the blast operation it is common for the compressed air to be fed through a moisture removal device such as a Schmidt AirPrep System The air pres...

Страница 25: ...the abrasive blast vessel 1 Blasting starts when the deadman lever 12 is pressed down The deadman sends an air signal that opens both the automatic air valve 9 and the Thompson Valve 14 Compressed air...

Страница 26: ...cted to the abrasive blaster must be same diameter as the air supply piping and rated at a minimum of 150psi operating pressure See the drawings and parts lists in Section 9 0 and refer to Sections 3...

Страница 27: ...ssistant close the choke valve completely for about one second This creates differential pressure at the Thompson Valve high pressure above low pressure below The higher pressure from the blast vessel...

Страница 28: ...eases abrasive flow Turning the knob counter clockwise increases the orifice size which will increase the abrasive flow to the blast nozzle The Thompson Valve II spring retainer has lines on the side...

Страница 29: ...Figure 5 4 and the drawing in Section 9 1 Figure 5 4 Thompson Valve Pneumatic Blast Control System 5 9 Blast Hose The blast air and abrasive mixture flows from the Thompson Valve 14 to the blast nozzl...

Страница 30: ...tside This number represents the nozzle throat diameter in sixteenths of an inch for example a 5 nozzle has a throat diameter of 5 16 See the tables in Section 13 0 for approximate air and abrasive co...

Страница 31: ...pressure vessel Install an air pressure relief valve to protect against over pressurization of the blast vessel See Section 3 11 6 1 3 Make certain that the abrasive blaster is not pressurized Follow...

Страница 32: ...d could result in serious injury or death See Sections 5 11 and 8 7 6 1 9 Connect the twinline hose quick disconnects 18 19 or the electric deadman extension cord to the mating disconnects on the abra...

Страница 33: ...ball valve body in the closed position 6 2 1 2 Slowly open the blowdown ball valve 4 As the blowdown ball valve 4 is opened air pressure inside will exhaust and depressurize the blast vessel 1 Airborn...

Страница 34: ...open The open popup indicates that the blast vessel is depressurized See Figure 7 1 7 1 3 Fill the blaster with dry abrasive though the abrasive inlet 6 Pass recycled abrasive through the screen 29 to...

Страница 35: ...for the valve varies depending on abrasive type blast pressure and nozzle size therefore it may take more than one adjustment to achieve the desired air abrasive mixture Further adjustment can be made...

Страница 36: ...control of the abrasive flow at the nozzle therefore allow a few seconds before adjusting further 7 2 13 Note the markings on the side of the Thompson Valve II spring retainer to view the knob positi...

Страница 37: ...he moisture trap 7 and contaminate the controls 7 3 2 Completely depressurize the abrasive blast vessel 1 by slowly opening the blowdown ball valve 4 See Section 6 2 for blowdown procedure Airborne pa...

Страница 38: ...1 should be inspected quarterly Pitting caused by corrosion will reduce the wall thickness of the vessel If excessive corrosion is found have the abrasive blast vessel inspected by a qualified facilit...

Страница 39: ...blies can rupture while blasting and the resulting abrasive blast stream can cause serious personal injury Static electric shock hazard To minimize the chance of static electric shock install a ground...

Страница 40: ...or Periodically check if air is leaking from end of blast nozzle when the blast operation is off A worn Thompson Valve seat usually causes this It is replaced by removing the four bolts in the base of...

Страница 41: ...es for soft spots wear cracks or air leaks See Section 8 6 X Remote Control Hoses Check hoses for soft spots wear cracks or air leaks See Section 8 6 X Remote Control Wires Check wiring for bare spots...

Страница 42: ...42 2013 Axxiom Manufacturing Inc THIS PAGE INTENTIONALLY BLANK...

Страница 43: ...brasive blast system is equipped with pneumatic or electric controls then reference the appropriate drawing and parts list to determine the required parts To insure the proper operation of the blast s...

Страница 44: ...44 2013 Axxiom Manufacturing Inc 9 1 a Mini Abrasive Blaster w Pneumatic Control System...

Страница 45: ...45 2013 Axxiom Manufacturing Inc 9 1 b Pneumatic Control System Parts List 3 5 20 cu ft...

Страница 46: ...46 2013 Axxiom Manufacturing Inc 9 2 a Thompson Valve...

Страница 47: ...47 2013 Axxiom Manufacturing Inc 9 2 b Thompson Valve II...

Страница 48: ...48 2013 Axxiom Manufacturing Inc 9 3 Automatic Air Valve...

Страница 49: ...49 2013 Axxiom Manufacturing Inc 9 4 a G2 Pneumatic Deadman...

Страница 50: ...50 2013 Axxiom Manufacturing Inc 9 4 b Deadman Valves Pneumatic...

Страница 51: ...h eye bolt 6 1 8020 000 15 Popup Gasket 39 10 7119 002 Safety Pin Air Blast Hose Coupling 1 2003 005 99 Air Regulator Replacement Part Kit 1 2302 204 99 Air Filter Replacement Parts Seals Kit 1 2302 2...

Страница 52: ...ot shut off Thompson Valve blasters only 1 Defective or broken spring in automatic air valve 9 2 Defective seat in automatic air valve 3 Blocked signal air hose to automatic air valve 4 Defective o ri...

Страница 53: ...ive choking out of blast hose with low blast air pressure 1 Thompson Valve 14 abrasive adjustment knob is open too far 2 Control air hose to automatic air valve 9 blocked pinched or leaking prevents o...

Страница 54: ...ive may be wet or there may be trash blocking the opening Try choking the blast outlet to clear the opening Proceed to step 11 3 2 If the knob does not get tighter during this test troubleshoot the co...

Страница 55: ...egligence corrosion erosion normal wear and tear alterations or modifications made to the machine without express written consent of Axxiom Manufacturing Inc 4 Warranty requests must be submitted in w...

Страница 56: ...ENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE USE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF ANY WARRANTY OR FOR ANY SPECIAL OR CONSEQUENTIAL DAMAGES OF ANY CHARACTER INCLUDING WITHOUT LIMITAT...

Страница 57: ...owing contact information Answers to most any safety related questions can be found at the OSHA website shown below Phone 1 800 321 6742 Website www osha gov U S Department of Labor Occupational Safet...

Страница 58: ...ntent No of Recycles Initial Cost Typical Use Corn Cobs 2 angular 35 45 tan none 4 5 low stripping paint from delicate substrates Sodium Bicarbonate 2 8 crystal 60 white none 4 5 medium cleaning and s...

Страница 59: ...59 2013 Axxiom Manufacturing Inc NOTES...

Страница 60: ...Selection Guide blasting 100 Psi NOZZLE SIZE No 4 1 4 No 5 5 16 No 6 3 8 No 7 7 16 No 8 1 2 CFM 100psi 90 140 200 270 350 AIR HOSE 1 1 4 1 1 4 1 1 2 1 1 2 2 BLAST HOSE 1 1 1 4 1 1 4 1 1 2 1 1 2 ABRAS...

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