Super Comet Pressure Blast & Vacuum System
Contents
1. 3 6 3 Do not apply excessive pressure that would cause the brush to bend into the blast stream 3 6 4 Make straight even passes over the blast surface The blast pattern should barely overlap the pattern from the previous pass 3 6 5 When reversing direction move the gun and brush in a small radius allowing the brush bristles to roll evenly 3 7 Shut down 3 7 1 After blasting is complete run the exhauster for several seconds to clear the hoses 3 7 2 When shutting down for the day empty the machine of abrasive per section 3 3 3 7 3 Close the compressed air supply valve 3 7 4 Drain receiver tank filters and water collecting devices and bleed the compressed air supply hose 3 7 5 Shutdown the compressor 4 0 ADJUSTMENTS 4 1 Blast Pressure 4 1 1 The blast pressure pilot regulator located on the blast machine enables the user to adjust blasting pressure to suit the application The suitable pressure for most purposes is 80 psi Lower pressures may be used for delicate work In all cases highest production can be achieved only when pressure is carefully monitored 4 1 2 To adjust unlock the knob and turn it clockwise to increase pressure or counter clockwise to decrease pressure Pressure will usually drop from closed line pressure when blasting is started Once operating pressure is set lock the knob to maintain the setting Page 5 4 2 Abrasive Metering 4 2 1 Abrasive flow is adjusted by the meterin2. 2004 CLEMCO INDUSTRIES CORP One Cable Car Dr Washington MO 63090 Phone 636 239 4300 FAX 800 726 7559 Email info clemcoindustries com www clemcoindustries com SUPER COMET PRESSURE BLAST and VACUUM SYSTEM O M 23437 MC FILE NUMBER 2099 0300 DATE OF ISSUE 02 20 02 REVISION NOTICE TO PURCHASERS AND USERS OF OUR PRODUCTS AND THIS INFORMATIONAL MATERIAL The products described in this material and the information relating to those products is intended for knowledgeable experienced users of abrasive blasting equipment No representation is intended or made as to the suitability of the products described herein for any particular purpose of application No representations are intended or made as to the efficiency production rate or the useful life of the products described herein Any estimate regarding production rates or production finishes are the responsibility of the user and must be derived solely from the user s experience and expertise and must not be based on information in this material The products described in this material may be combined by the user in a variety of ways for purposes determined solely by the user No representations are intended or made as to the suitability or engineering balance of the combination of products determined by the user in his selection nor as to the compliance with regulations or standard practice of such combinations of components or products It is the responsi
3. Engineers ASME standards as described in Section VII Div 1 and carry a National Board certification It is the owners responsibility to maintain the integrity of the vessel as may be required by some states This may include regular inspection and hydrostatic testing as described in National Board Inspection Code and Jurisdictional Regulations and or Laws A WARNING Welding grinding or drilling on the blast machine could weaken the vessel Compressed air pressure could cause a weakened vessel to rupture resulting in death or serious injury Welding grinding or drilling on the blast machine vessel without a National Board R stamp voids the ASME and National Board certification 1 3 2 2 All welding repairs done on the vessel must be performed by certified welders at shops holding a National Board R Stamp Welding performed by any welder not properly qualified per the ASME Code voids ASME and National Board certification of the vessel 1 3 2 3 The vessel is rated for a maximum of 125 psi pounds per square inch do not exceed rated pressure A WARNING Excessive air pressure could cause the blast machine to rupture To prevent serious injury or death do not exceed the rated pressure of the blast machine vessel SUPER COMET PRESSURE BLAST and RECOVERY MACHINE Control Cord To blast head Reclaimer Blast Machine Media Metering Valve Dust Collector Exhauster Tube Filters On Off Switch Du
4. Gasket air injector cccceeeeeeeeeeees 11754 Gasket motor adaptor cccccccceeeees 11781 MOO eenaa e a A aed 12315 Figure 5 8 4 Electrical Refer to the schematic packed in the electrical panel for items not listed Item Description Stock No Transformer arraira 12172 Relay 24 Volts icena a 12047 SWE on ENAGA 12127 8 5 Miscellaneous Caster 4 inch each sssesessessssrsrrsrreresseerrreresesss 13142 Lock pins pkg of 25 for twist on couplings 11203 Safety cable 1 2 hose ssssossessneneeessessrrnreressene 15012 Page 11 8 6 Reclaimer Figure 6 Item Description Stock No 1 Debris screen mannna aenn aa 21265 2 Gasket doof na ienai oi 11745 3 Gasket reclaimer mount 0ee 11755 4 Hose vacuum 1 1 2 x 20 ft oo ee 12450 5 GIAMD 22 oecssissde anra aa hasa 12750 6 Gasket 5 16 x 1 adhesive backed 4 ft required vous heed neiiidetedees 00187 7 Spring latch assembly eceeeeeeees 12263 8 Wear plate iieri ianari 13882 Figure 6
5. brushes 7 1 7 Nozzle worn Check nozzle orifice and replace the nozzle if worn by 1 16 7 1 8 Exhauster not operating Make sure the exhauster toggle switch is on 7 2 Abnormally High Abrasive Consumption 7 2 14 Door on reclaimer open or improper fit or worn door gasket Air entering the reclaimer at this point will cause abrasive to be carried into the dust collector DO NOT operate unless all doors are closed 7 2 2 Abrasive may be too fine or worn out 7 2 3 Using friable abrasive that rapidly breaks down 7 2 4 Nozzle pressure too high for the abrasive causing abrasive to break down 7 2 5 Hole worn in reclaimer or leak in reclaimer seams Check reclaimer for negative pressure leaks 7 3 Reduction In Blast Cleaning Rate 7 3 1 Low abrasive level reducing abrasive flow Check and fill if low 7 3 2 Incorrect metering valve adjustment Adjust per Section 4 2 7 3 3 Reduced air pressure This may be caused by a malfunctioning regulator a dirty filter element in air filter partially closed air valve leaking air line or other air tools in use 7 3 4 Blockage in nozzle Blockage may occur as a result of a missing debris screen 7 3 5 Moist abrasive Frequent bridges or blockage in the area of the metering valve can be caused by moisture See Section 7 5 7 4 Plugged Nozzle 7 4 1 Depressurize the blast machine before checking the nozzle for blockage Page 8 7 4 2 A damaged or missing reclaimer scr
6. dust released from the bags collects in a pan for disposal 1 3 3 5 When the operator releases the control switch stopping the blast action the blast machine depressurizes and automatically refills with abrasive collected in the reclaimer hopper 1 4 Nozzle Options 1 4 1 Super Comets are shipped with a 3 16 orifice tungsten carbide nozzle Use an optional boron carbide nozzle and tube insert when blasting with aggressive abrasive See Section 8 1 1 5 Abrasive 1 5 1 Super Comets are designed to utilize most common recyclable abrasives between 60 and 280 mesh that are specifically manufactured for blasting Suitable abrasive mesh sizes are based on typical abrasive flow 1 5 2 Glass Bead Glass bead No 6 to 13 may be used Most beads are treated to ensure free flow operation even with moderately high humidity Glass beads subjected to moisture may be reused only after thorough drying and breaking up of the lumps 1 5 3 Aluminum Oxide Silicon Carbide and Garnet Aggressive abrasives such as these may be used but consideration must be given to the rapid wear on all parts of the system reclaimer nozzle or hoses etc which come in contact with the abrasive Optional boron nozzles are required when any of these abrasives are used See Section 8 1 Page 3 1 5 4 Steel Steel grit or shot is too heavy for the system to recover Do not use metallic abrasive 1 5 5 Sand and Slag Sand should never be used because of
7. the respiratory hazards associated with abrasives containing free silica Slags are not recommended because they rapidly break down 2 0 SET UP 2 1 Compressed Air Requirements 2 1 1 Minimum air supply requirements are 70 cfm 45 cfm when nozzle is new 70 cfm when nozzle is worn at 80 psi 2 1 2 The air supply line from the compressor to the blast machine inlet should have a minimum ID of 3 4 2 1 3 Install an air supply hose fitting to air filter that is compatible with the compressed air supply hose 2 1 4 Install an isolation valve at the air source to enable depressurization for service and connect an air line from the air source to the air filter inlet located at the blast machine inlet A WARNING If twist on type air hose couplings are used they must be secured by safety lock pins or wires to prevent accidental disconnection while under pressure Hose disconnection while under pressure could cause serious injury 2 1 5 The air filter removes condensed water from the compressed air Its use is especially important in areas of high humidity or when fine mesh abrasive is used Moisture causes abrasive to clot and inhibits free flow If moisture problems persist an air dryer may be required 2 2 Electrical Requirements 2 2 1 115 VAC 1 Ph 60 Hz with 15 Amps A power cord is supplied No additional wiring is required SEE FOLLOWING IMPORTANT WARNING A WARNING Do not use electrical adaptors that eliminate th
8. valve Air should exhaust from the muffler when the finger switch is released If air does not exhaust remove the muffler and try again If air exhausts now the muffler is blocked If air does not exhaust the solenoid valve may be faulty Have it checked by a qualified electrician 7 11 Blast Machine Will Not Pressurize 7 11 1 Make sure that the air compressor is on and air supply valves are open 7 11 2 Check that pressure regulator is not turned down Minimum pressure is 40 psi See Section 4 1 7 11 3 Inadequate air supply See Section 2 1 7 11 4 Inspect the diaphragm outlet valve for wear 7 11 5 Inspect pop up valve and seat for alignment and wear 7 11 6 Blocked or leaking control line Check all fittings for blockage or leaks 7 11 7 Finger switch or solenoid valve malfunction Check by qualified electrician 7 11 8 Inspect the check valve for obstruction or broken flap Page 9 7 12 Dust Leaking From Dust Collector 7 12 1 Check for damaged or loose filters 8 0 ACCESSORIES AND REPLACEMENT PARTS 8 1 Blast Head and Control Assembly Figure 3 Item Description Stock No 1 Control assembly includes items 8 9 and 10 ee 12383 2 Head vacuum includes set screws and item 3 in alum 12300 3 Insert tube aluminum standard ccccceeeeeeeees 12175 boron carbide optional cceee 12409 4 Colar tea A ON 13890 5 Nozzle Tungsten carbide CT 2 1 8 OFFICE nnet
9. wear 5 1 5 Inspect the reclaimer wear plate for wear Replace the wear plate before the rubber coating wears through SUPER COMET PRESSURE BLAST and RECOVERY MACHINE 5 2 Dust Collector 5 2 1 The dust collector uses tubular filters which collect dust on their inner surfaces Every two to three hours while the exhauster is on clean the filter bags by opening and closing each door four to six times in succession Hand pulls are provided on these two doors which are located on the dust collector directly above the dust drawer Opening and closing the doors momentarily compresses the filter bag loosens dust dropping it into the dust drawer During the blasting operation the collector doors must be closed tightly 5 2 2 Empty the dust drawer regularly Begin by checking the drawer after every bag cleaning and adjust frequency based on usage and breakdown rate of abrasive Dump the contents into a suitable disposal container A CAUTION Blast media is usually non toxic however some materials removed by the process may be toxic Check with proper authorities for disposal regulations 5 3 Debris Screen 5 3 1 The screen is accessible through the reclaimer door With the exhauster off remove the screen and empty it daily or when loading abrasive Empty more often if part blasted causes excessive debris Do not operate the machine without the screen in place 5 4 Air Filter 5 4 1 The blast machine is equipped with a manua
10. 01351 CT 3 3 16 orifice standard 01352 CT 4 1 4 orifice ncccsscr 01353 Boron carbide CTB 3 cceeeeeeeeee eee 21091 6 Nozzle washer pack of 10 ccccceeee 21580 7 Retainer DrUSN oo ceecccceeeesesseseseeeeeeees 12039 8 Gover SWICH erano Sen srsececth stun caasiacesiseette 11587 9 SWITCH dei diel hs Maen ees 12119 10 Gasket 1 8 x 2 foam per foot 1 foot min trim to fit 0 eee 13089 11 Hose blast 1 2 ID x 25 ft coupled includes item 12 and coupling 01268 12 Nozzle holder CHE 1 2 00 0 ceeececeeee eee 00577 13 Hose vacuum 1 1 2 x 20 ft eee 12450 14 Clamp zra cred don es chet EAN 12750 15 Flat Surface Brush ccccceseeeseseeeeeeeeees 11569 16 Inside Corner Brush ccccccceeeeeeneeeeees 11570 17 Outside Corner BruSh cccccceeeeeeeeees 11571 Figure 3 SUPER COMET PRESSURE BLAST and RECOVERY MACHINE 8 2 Item ODNAARWN gt Blast Machine Figure 4 Description Stock No Ball valve with handle 1 ceeeeeees 02396 Handle 1 ball valve 20 0 cece cccccceaeeneeeeees 22531 Pop up vale zinea a ata 01242 Seat POP UP ccccececeeeeeeseeeeceeceeeeeeeeeees 01245 Check valve 1 SWING ccceeeeeeeeeeee 12187 Metering valve Sentinel fine mesh 21439 Inspection door assembly 3 x 4 oo 01267 Gasket 3 x 4 inspection door 01249 Regulator 1 4 pil
11. bility of the knowledgeable experienced users of the products mentioned in this material to familiarize themselves with the appropriate laws regulations and safe practices that apply to these products equipment that is connected to these products and materials that may be used with these products It is the responsibility of the user to insure that proper training of operators has been performed and a safe work environment is provided Our company is proud to provide a variety of products to the abrasive blasting industry and we have confidence that the professionals in our industry will utilize their Knowledge and expertise in the safe efficient use of these products SUPER COMET PRESSURE BLAST and RECOVERY MACHINE 1 0 INTRODUCTION 1 1 Scope of manual 1 1 1 These instructions cover the set up operation maintenance troubleshooting and replacement parts for the Super Comet blast and recovery machine 1 1 2 These instructions also contain important information required for safe operation All blast operator s must be trained in the safe operation of the blast machine system and all blasting accessories The operators and all personnel associated with the abrasive blasting process must know about the hazards associated with abrasive blasting Before using the machine all personnel associated with the blast machine operation must read this entire manual including the orange cover and all accessory manuals 1 2 Safety Al
12. e ground prong on 115 volt plugs Doing so can cause electric shock and equipment damage SUPER COMET PRESSURE BLAST and RECOVERY MACHINE 3 0 OPERATION 3 1 Inspection 3 1 1 Make sure the coupling gaskets are in place and in good condition before connecting the blast hose to the quick coupling on the blast machine Use safety lock pins or safety wire to lock the couplings together to prevent accidental separation during blasting 3 1 2 Make sure that all compressed air supply hose connections are secured with safety lock pins and safety cables to prevent accidental separation or disconnection Lock pins and safety cables are listed in Section 8 5 A WARNING Hose disconnection while under pressure could cause serious injury or death Use safety lock pins and safety cables on all coupling connections to help prevent hose couplings from accidental disconnection 3 1 3 Make sure that all air fittings are secure Leaks will cause the system to malfunction 3 1 4 Check that the choke valve is open handle in line with the piping 3 1 5 Close the abrasive metering valve The closed position for the Sentinel valve is fully right 3 2 Loading the Machine with Abrasive 3 2 1 Capacity Abrasive capacity is approximately 5 cu ft 1 2 cubic foot The machine is full when abrasive reaches the level of the pop up valve Overfilling will result in abrasive carryover to the dust collector and possible blockage in the conveyin
13. een will allow large particles to pass and block the nozzle Replace or re install as necessary 7 5 Abrasive Bridging 7 5 1 Frequent bridging or blockage in the metering valve can be caused by damp abrasive Abrasive becomes damp by blasting parts that are slightly oily from moisture in the compressed air line or from absorption 7 5 2 To avoid contaminating abrasive from the workpiece all parts should be clean and dry If parts are oily or greasy degrease and dry them prior to blasting 7 5 3 Moist compressed air may be due to a faulty compressor that overheats or pumps oil or moisture into the air line too long an air line permitting moisture to condense on the inside high humidity Drain the filter regularly If the problem persists change abrasive more often or install an aftercooler or air dryer 7 5 4 Absorption Some abrasive tends to absorb moisture from the air especially fine mesh abrasive in high humidity areas Empty the blast machine after use 7 5 5 A vibrator mounted either on the blast machine leg or on a bolt on the abrasive metering valve may help prevent bridging of fine mesh abrasive 7 6 Neither Abrasive Nor Air Comes Out The Nozzle When The Finger Control Switch Is Pressed 7 6 1 Depressurize the blast machine and check the nozzle to see if it is plugged See Section 7 4 7 6 2 Check that the blast machine pressurizes when the switch is pressed If it does not see Section 7 11 7 6 3 Check that
14. erts 1 2 1 Clemco uses safety alert signal words based on ANSI Z535 4 1998 to alert the user of a potentially hazardous situation that may be encountered while operating this equipment ANSI s definitions of the signal words are as follows A to alert the user of this equipment of potential personal injury hazards Obey all safety messages that follow this symbol to avoid possible injury or death This is the safety alert symbol It is used CAUTION Caution used without the safety alert symbol indicates a potentially hazardous situation which if not avoided may result in property damage A CAUTION Caution indicates a potentially hazardous situation which if not avoided may result in minor or moderate injury A WARNING Warning indicates a potentially hazardous situation which if not avoided could result in death or serious injury Page 1 A DANGER Danger indicates an imminently hazardous situation which if not avoided will result in death or serious injury 1 3 Components and Theory of Operation 1 3 1 Components Figure 1 1 3 1 1 The primary components of the Super Comet are 1 Blast machine with controls and blast hose 2 Blast head assembly with brushes for inside corner outside corner and flat surfaces 3 Reclaimer and recovery hose 4 Dust collector and exhauster 5 Cart 1 3 2 Blast Machine 1 3 2 1 The blast machine pressure vessel is manufactured to American Society of Mechanical
15. g hose 3 2 2 Abrasive Loading With the exhauster off pour clean dry abrasive into the reclaimer hopper through the reclaimer door 3 3 Emptying the Machine of Abrasive 3 3 1 When working in environments subject to extreme temperature changes or very humid conditions condensation may develop inside the machine Condensation wets abrasive and causes flow problems To prevent this empty the machine of all abrasive when shutting down for the day This will eliminate trouble from moist abrasive when starting a new day s blasting 3 3 2 With the blast machine off turn the blast pressure down to approximately 40 psi close the choke valve and set the abrasive metering valve at full open Page 4 3 3 3 Point the nozzle into a drum or suitable container or in the direction the abrasive is to be disposed 3 3 4 Hold the hose securely and pressurize the machine by activating the control switch Be prepared for surging or recoil of the hose which can be severe 3 3 5 When the machine is empty release the control switch open the choke valve and reset the abrasive metering valve 3 4 Select Brush 3 4 1 Three containment brushes are supplied One for flat surfaces one for inside corners and one for outside corners 3 4 2 Using the elastic brush retainer attach the appropriate brush to the blast head 3 5 Blasting Operation CAUTION All parts to be blasted must be free of oil water and other contaminants If no
16. g valve located at the bottom of the blast machine The valve is closed when the handle is fully right To adjust close the valve and slowly move the handle to the left to increase abrasive flow Allow time for the flow to stabilize before further adjusting The valve is fully open when the handle is at the full left position The correct flow rate will depend on the type and size of abrasive and blasting pressure and can best be determined by experience Use as little abrasive as possible to do the job while maintaining the best cleaning rate 5 0 PREVENTIVE MAINTENANCE A WARNING Failure to wear approved respirators and eye protection when servicing dust laden areas of the dust collector and when emptying the dust drawer could result in serious eye irritation and lung disease or death Toxicity and health risk vary with type of abrasive and dust generated by blasting The respirator must be approved for the type of dust generated Identify all material being removed by blasting and obtain a material safety data sheet for the blast abrasive 5 1 Inspection 5 1 1 To avoid unscheduled downtime establish a weekly inspection schedule Inspect all parts subjected to abrasive contact 5 1 2 Inspect the blast head assembly nozzle and brushes for wear 5 1 3 Inspect the blast hose and recovery hose for wear by squeezing and feeling for soft spots 5 1 4 Inspect dust collector bag compartment for dust Check the dust bags for
17. l drain air filter Drain the filter at least once a day and more often if an abundance of moisture accumulates Moist air inhibits the flow of abrasive If moisture continues to be present a dryer or aftercooler may be required in the air supply line 5 5 Changing Abrasive Type 5 5 1 When changing the type of abrasive make sure the blast machine blast hose recovery hose and reclaimer are carefully cleaned to remove any remaining abrasive material If not carefully done the new abrasive will be contaminated Page 6 6 0 SERVICE MAINTENANCE A WARNING Failure to wear approved respirators and eye protection when servicing dust laden areas of the dust collector and when emptying the dust collector could result in serious eye irritation and lung disease or death Toxicity and health risk vary with type of media and dust generated by blasting Identify all material being removed by blasting and obtain a material safety data sheet for the blast media 6 1 Nozzle 6 1 1 Replace the nozzle when its diameter has increased by 1 16 or sooner if pressure diminishes noticeably or if abrasive escapes from the brush Make sure the nozzle gasket is in place before screwing the nozzle into the nozzle holder 6 2 Filter Tube Replacement A CAUTION e Do not bend spring ends tight enough to cause ends to kink e Do not use a sharp instrument to force spring rings into the opening This could damage the filter and seriously i
18. last surface 6 4 Reclaimer Wear Plate Replacement 6 4 1 Remove the two screws holding the wear plate in place and remove the wear plate 6 4 2 Place the new wear plate into position and secure with self drilling screws 6 4 3 Caulk between the wear plate and reclaimer housing to prevent rapid wear in those areas 6 5 Pop up Valve Replacement 6 5 1 Empty the machine of media as described in Section 3 3 6 5 2 Depressurize the blast machine and lock out and tag out the compressed air supply A WARNING Failure to observe the following procedure before performing any maintenance could cause serious injury or death from the sudden release of compressed air e Depressurize the blast machine e Lock out and tag out the compressed air supply e Bleed the air supply line to the blast machine Page 7 6 5 3 To gain access to the pop up valve remove the inspection door assembly 6 5 4 Using a small pipe wrench unscrew the pop up valve guide by turning it counterclockwise Remove the pop up valve and guide from the machine Place the new pop up valve in the guide and screw the valve guide with the pop up valve in it back into position inside the machine Tighten the guide as tight as possible without using a wrench 6 5 5 Put anew gasket on the inspection door and bolt the door back onto the machine 6 6 Pop up Valve Seat Replacement 6 6 1 The easiest method to replace the rubber pop up seat is through
19. mpair the function of the dust collector e Install one filter at a time Check the seating of the top and bottom spring rings and that tube is not twisted before proceeding to the next 6 2 1 Replace damaged filters immediately Remove the old filters by pulling the spring rings off the bottom and top tube plates Working from the back to the front install one filter at a time To install new filters form the end of the spring ringed tubular filter into a shallow c shape push the filter far enough into the hole of the top plate to allow one spring ring to snap into place above the tube plate and the other to snap into place below it See the illustration in Figure 2 6 2 2 The tubular filters are held firmly by a spring ring above and below the perimeter of the hole in the plate The other end of the filter is similarly installed in the lower plate The filters fit tight to prevent dust leakage To ensure a tight seal some force may be required by the installer Check for proper seating at both ends and remove any twist before proceeding to the next filter SUPER COMET PRESSURE BLAST and RECOVERY MACHINE One ring above tube plate Top Tube Plate a One ring below tube plate Spring Ring DNI Bottom Tube Plate Pa Spring Ring Figure 2 6 3 Brushes 6 3 1 To avoid unscheduled down time keep spare brushes on hand Replace brushes at the first sign of deterioration Worn brush will cause abrasive escaping at the b
20. ot with gauge 12050 Gauge pressure 1 8 COM e 01908 Solenoid 4 Way ccccceceeeceeeeeeeeeeeees 12197 Muffler 1 4 bronze cecseeceeeeeeeeeeeeeeeee 03988 Valve 1 2 diaphragm outlet 02512 Page 10 Adaptor 1 male NPT x 1 male flare 11720 Pusher line assembly 22508 Muffler exhaust cccccceecesseeeeeeeeeseeneees 05068 Regulator 1 pilot operated with gauge 12052 Air filter auto drain cee eeeeeeceeeeeeeee es 22425 Gasket 5 16 x 1 adhesive backed 4 ft required csi tecictisreecgndieiceeihtnescniees 00187 Fitting elbow 1 4 NPT x 3 8 tube 11685 Fitting straight 1 4 NPT x 3 8 tube 11736 Tubing 3 8 OD poly specify ft required 12478 CFP P Coupling w nipple 1 1 4 NPT 10806 Gasket CQGP 3 pack of 10 08 08853 Coupling 1 2 ID hose CQA 1 2 00599 Gasket CQG pkg of 10 2 00 00850 Nozzle holder CHE 1 2 ccccceeeeeeeeee 00577 Blast hose 1 2 ID x 25 ft coupled includes items 25 amp 27 ccceeecccceeeee eens 01268 Figure 4 8 3 Item GN Nook SUPER COMET PRESSURE BLAST and RECOVERY MACHINE Dust Collector Figure 5 Description Stock No Spring Latch aeaee 11876 Gasket COOP ie aian iapa 13481 Gasket 5 16 x 1 adhesive backed aft TEQUIFE narices a 00187 Dust Bag 20 Long 12 required 11506
21. st Door ae A Dust Drawer fs Exhaust Muffler 1 3 2 4 OSHA does not require pressure relief valves on blast machines when air compressors supplying air to the blast machines are built to ASME specifications and comply with OSHA regulations ASME Manual section VIII Division 1 UG 125 paragraph A90 g states that pressure relief valves or protective devices need not be installed directly on a pressure vessel when the source of pressure is external to the vessel and is under such positive control that the pressure in the vessel cannot exceed the maximum allowable working pressure at the operating temperature OSHA regulation 1910 169 refers to the above ASME code when describing the necessity of pressure relief valves on compressed air equipment DO NOT operate blast machines with air compressors that are not equipped with properly functioning pressure relief valves Page 2 Exhauster i 115 Volt Plug Air Filter L Compressed Air Inlet Choke Valve Debris Screen Finger blast Switch 7 Blast Head Assembly POs Vacuum Recovery Hose Sa Blast Hose Figure 1 American Society of Mechanical Engineers Boiler and Pressure Vessel Code 1989 Occupational Safety and Health Administration 29 CFR 1910 Subpart M Compressed Gas and Compressed Air Equipment 1 3 3 Theory of Operation 1 3 3 1 When the air supply is on and electrical power is connected the blast machine is ready for actua
22. t clean the abrasive may contaminate the blast surface and may clog abrasive resulting in equipment malfunction 3 5 1 Operators must wear operator safety equipment A NIOSH approved supplied air respirator protects against inhalation of dust Heavy gloves and clothing will help prevent serious injury from the abrasive blast if the closed brushes are accidentally lifted off the surface 3 5 2 The machine is ready for operation when compressed air and electrical power are supplied to the machine and the machine contains abrasive 3 5 3 Adjust the pressure regulator located on the blast machine piping to the required blasting pressure per Section 4 1 3 5 4 Start the exhauster by flipping the toggle switch located on the electrical panel 3 5 5 Hold the blast head brushes against the surface to be blasted depress the finger switch blasting air only at this time will begin within a couple of seconds Adjust the abrasive flow per Section 4 2 SUPER COMET PRESSURE BLAST and RECOVERY MACHINE 3 5 6 To stop blasting release the pressure on the finger switch Leave the brush against the surface for several seconds after blasting stops to ensure that all abrasive is recovered from the surface 3 6 Operating Technique 3 6 1 To achieve full abrasive and dust recovery the brush must be in contact with the surface at all times 3 6 2 Keep the brush flat against the surface Keep the blasting head perpendicular to the surface
23. the abrasive metering valve and the choke valve are open 7 7 Blast Machine Will Not Depressurize Or Depressurizes Too Slowly 7 7 4 Faulty finger switch or solenoid valve Check voltage and continuity by a qualified electrician 7 7 2 Check the outlet muffler for blockage 7 8 Heavy Abrasive Flow 7 8 1 Make sure the choke valve is open 7 8 2 Abrasive metering valve open too far Adjust per Section 4 2 If adjusting the valve does not regulate abrasive flow empty the machine depressurize the SUPER COMET PRESSURE BLAST and RECOVERY MACHINE machine and inspect the internal parts of the valve for wear Refer to the Sentinel metering valve manual for troubleshooting and maintenance of the valve 7 9 Abrasive Surge A small amount of surge is normal at start up 7 9 1 Heavy abrasive flow Adjust per Section 4 2 7 9 2 Empty and depressurize the blast machine and inspect the internal parts of the metering valve for wear 7 10 Air Only no abrasive Comes Out The Nozzle 7 10 1 Make sure the machine contains abrasive 7 10 2 Check that the abrasive metering valve is open 7 10 3 Check for minor blockage in the abrasive metering valve by fully opening the metering valve and closing the choke valve Activate the finger control switch to blow out obstructions If this procedure fails depressurize the machine open the metering valve inspection plate and check for foreign objects 7 10 4 Check the muffler on the solenoid
24. the reclaimer access door If for some reason replacement can not be made through the reclaimer observe the warning in Section 6 5 empty the machine and bleed the air supply line Remove the inspection door assembly and work through the opening 6 6 2 Remove the old seat by using a finger screwdriver or similar object to work the seat out of the retainer groove 6 6 3 Push the new seat all the way through the port and then fit it into the groove Pull up on the seat and allow it to pop into position 7 0 TROUBLESHOOTING A WARNING To avoid serious injury observe the following when troubleshooting e Turn off the air and lock out and tag out the air supply e If checking the controls requires air always enlist the aid of another person to Hold the nozzle securely Operate the finger switch e Never bypass the finger switch or tie it in the operating position 7 1 Poor Vacuum Recovery abrasive escaping at brushes 7 1 1 Dirty tube filters Clean the tube filters and empty dust drawer regularly 7 1 2 Using friable abrasive that rapidly breaks down or using abrasive that is too fine or worn out SUPER COMET PRESSURE BLAST and RECOVERY MACHINE 7 1 3 Hole worn in recovery hose between blast head and reclaimer inlet Inspect hose for wear 7 1 4 Reclaimer or dust collector door open All doors must be closed during operation 7 1 5 Obstruction in recovery Check for blockage 7 1 6 Brushes worn Inspect
25. tion by the switch mounted on the blast hose hand grip assembly Pressing the finger switch activate the electrical solenoid which pneumatically opens the normally closed main inlet regulator and closes the normally open outlet valve The incoming air pressurizes the blast machine and blasting begins When pressure on the switch is released the blast machine depressurizes and blasting stops SUPER COMET PRESSURE BLAST and RECOVERY MACHINE 1 3 3 2 During operation the abrasive metering valve installed at the bottom of the pressure vessel meters a controlled quantity of abrasive into the air stream The air and abrasive travels through the blast hose to the blast gun Blasting is contained entirely within the hand held gun assembly A brush at the end of the assembly confines the abrasive and draws in atmospheric air sweeping the blast area clean 1 3 3 3 Spent abrasive and by products are conveyed from the blast surface to the reclaimer At the reclaimer the reusable abrasive material drops out of suspension due to the cyclonic action passes through a screen and collects in a hopper located above the blast machine 1 3 3 4 Air dust and fine by products leave the reclaimer and are drawn through the dust collector Dust collects in the cloth filter and the cleaned air passes through the exhaust fan and is discharged into the atmosphere Dust particles trapped by the filter bags are removed by a mechanical bag shaking mechanism
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