Operating Manual for sprayvalve MKDD-IS
Contents
1. Operating Manual for sprayvalve MKDD IS Read this manual carefully before installing operating or servicing this equipment Keep always handy for further use ALFRED SCHUTZE Apparatebau GmbH Spritztechnik Spraytechnology Hannoversche Stra e 69 71 28309 Bremen Germany Postfach 44 86 48 28286 Bremen Germany Tel 0049 0 421 43510 0 Fax 0049 0 421 43510 43 Internet http www schuetze gmbh de E Mail info schuetze gmbh de 1 Introduction The spray valves of series MKDD IS are spezial designed for the application of glues and adhesives A spezial of this valve is the integrated atomizing air valve which allows an independent regulation of purging air time for cleaning the nozzle and needle point Depending on air cap this spray valve sprays in flat or roundspray Depending on viscosity of fluid the application can be adjusted individually via nozzle dimension atomizing air pressure and material pressure The supply of atomizing air control air and material should be done via three hoses Spray valves are precision tools Always keep clean and observe minimum instructions to maintain a long usefull life of the valve 2 Safety 2 1 Duties of the user The user must read this service manual carefully before performing any operations Application and service operations should not be carried out if the user is not absolutely sure of the purpose and consequence of the operations 2 2 Defini2. Also atomizing air should be clean Control air should be slightly oiled 5 1 Cleaning To clean valve spray solvent until pure solvent leaves nozzle Do not submerge entire valve in solvent At longer working interruptions it is advisable to clean air cap and nozzle by putting these parts only into solvent If necessary use a soft brush Moving parts and threads should alway be greased slightly The spray valve should be cleaned using an appropiate thinner To clean small drill holes use our special nozzle cleaning needles 5 2 Possible case of failure Needle sticks Check if current on solenoid valve slight click noise Check if sufficient control operating air is supplied 5 6 bar Check if o ring 6 2 0 o ring 7 4 0 or o ring 7 5 0 are in propper order Check if needle 7 0 0 is dirted by f i glue residues or sticks within nozzle Check if minimum of travel of needle is set 5 3 Replacing air valve 11 0 0 Screw out lock screw 11 1 0 Take out spring 11 3 0 and remove piston 11 2 0 If necessary change o rings 11 1 1 11 2 1 Re assemble new parts in reverse order slightly greased 5 4 Replacing non return valve complete 10 0 0 Screw out adjusting screw 10 4 0 Screw out pin 10 6 0 Instead of the adjusting screw 10 4 0 a screw M 3 thread is to be used to pull out the base housing 10 1 0 If necessary replace non return gasket 10 5 0 as well as o rings 10 2 0 and 10 3 0 Re assemble new pa
3. de first place o ring 5 2 0 into the front retainer bore After that insert gasket 5 1 0 into the center of o ring The shaped gasket 5 1 0 is not symetrical The somewhat wider opening must be positioned to point to the front of spray valve i e after assembling retainer in direction fluid nozzle When inserting o rings and gaskets do not use any sharp or pointed metallic implements Mainly the gasket as a very precise and sensitive component is not able to stand impacts Completed retainer 6 0 0 slightly greased then is put back into housing an without turning movement by means of a screwdriver is to be carefully pushed through housing thread observing outer o ring 5 3 0 Lastly screw retainer into housing thread tighten only slightly O rings employed are of first class viton quality and by no means should be substituted by minor qualities ww 08 2 uu zz imme lt T ve f
4. lve 24V DC 1 8W with plug solenoid valve 24V DC 1 8W with LED plug solenoid valve 110V 50Hz 1 8W with plug solenoid valve 220V 50Hz 1 5W with plug 7 Technical data Measurements with air cap flatspray 130mm x 22mm x 80mm with air cap roundspray 127mm x 22mm x 80mm Weight approx 525g Air consumption approx 150 l min at 3 bar nozzle 1 0mm and flatspray air cap Control air pressure 5 6 bar Atomizing air pressure as required but less then control air pressure Material Pressure max 35 bar Special designs on request Technical alterations reserved June 2001 8 Manufacturer declaration The spray valves MKDD IS were constructed and produced by ALFRED SCHUTZE Apparatebau GmbH Hannoversche StraBe 69 71 28309 Bremen Germany in accordance with the guidelines and standards of DIN EN 292 This spray valve can be combined with other modules or machines which comply to DIN EN 292 without limiting the conformity Place Date Signature of manufacturer Bremen 29 06 2001
5. rts in reverse order slightly greased 5 5 Replacing needle 7 0 0 and nozzle 2 1 0 Screw out ratchet assembly complete 9 0 3 Take off collar ring 3 1 0 and air cap 1 1 0 Screw out nozzle 2 1 0 Carefully push out needle 7 0 0 from the nozzle side to the rear Re assemble new parts in reverse order sightly greased It is not recommended to use old needles because even slightly damaged needle shafts would immediatly cause leakage in shaped gasket 5 1 0 5 6 Replacing retainer set 6 0 0 complete with packing set 5 0 0 Unscrew needle lock 9 2 3 take out spring 9 6 3 and pull out needle 7 0 0 by using flat nose plier be carefull needle in most cases is made of brittle tungsten carbide Then usingn a screwdriver loosen retainer 6 1 0 till end of thread As retainer can not go through the thread by itself because of o ring 5 3 0 it has to be carefully pushed through be means of a thin metal sheet of 0 5 1 0mm placed between gun body recess and retainer After passing thread retainer is accessible for taking out or housing 5 7 Mounting gaskets and o rings In case a new retainer set is not available to be replaced as a complete unit the used retainer has to be cleaned thoroughly especially the o ring groove and seats These should also be greased slightly O ring 6 2 0 is to be placed first into ground of the rear retainer bore O ring 5 3 0 then into the outer groove Mounting the gasket on the fluid si
6. s to nozzle and needle adjust decrease of fluid flow turning regulating knob 10 1 1 clockwise only when fluid is emitted from the nozzle This is the only way to observe the steady reduction of fluid flow until an absolute stop of fluid Going on to turn the regulating knob clockwise would at once push the needle into the nozzle to such an extant that both parts could be damages This applies expecially to valves where needle regulation is execute by hexagon key special design not shown in sectional drawing It is harmless to leave fluid within the valve no connection to outside air if system stays under pressure 5 Repair and Maintance Before starting maintenance or repair work ensure that all air operated tools are disconnected from the air supply WARNING Danger caused by combustible and noxious spraying material Safety instructions on fluid can and material data of fluid manufacturer must definitly be observed WARNING gt gt Before opening the spray valve it has to be disconnected from the air and fluid supply Otherwise ejected elements can cause danger These spray valves are high precision tools Always keep clean and observe minimum instructions to maintain a long and useful life of valve We recommend lubricating moveable parts regularly and greasing threads especially the nozzle threads when replacing or cleaning the nozzle It is recommended to use clean and filtered application fluid only
7. should be limited as far as possible 4 1 Hose connection The three hoses have to be assambled as under 1 atomizing air blue to 1 8 screw 21 1 0 2 control air black to M5 screw 21 0 0 3 material transparent to 1 8 screw 21 2 0 4 2 Operating instructions CAUTION Never point the sprayjet against persons Wearing eye protection is strongly recommended Spraying procedures cause noises depending on the used pressure If necessary wearing of ear protection is recommend WARNING Danger caused by combustible and noxious spraying material Safety instructions on fluid can and material data of fluid manufacturer must definitely be observed The spray valves MKDD IS are working with a control air pressure of 5 6 bar The atomizing air pressure must be less than the material pressure This avoids flow back of material If high material pressure are required please observe in any case the safety regulations of the employee s compensation departments The travel of needle is giving way to fluid as adjusted by regulating knob 9 1 3 Turning this knob in anticlockwise turn more fluid clockwise turn less fluid One revolution of regulating knob 9 1 3 gives 0 5mm more stroke IMPORTANT e The maximum fluid outlet is already reached when no further ratchets are noticeable Do not turn the regulating knob 9 1 3 in anti clockwise turn any further IMPORTANT To avoid damage
8. t fl S 7 Y Wei N ZZOOOOO 1 AR Y Uy Pol MT gt S IN NN 41 ee el O NA WKE det A ne ee ae eee an EN Sele eae PR th NN Wa E HU ja N ULU OST 2 gt YT OLE gt BP pr 0 0 i 0712 eras Fe oe gt ETA L 0 S OL O v OL O LOL en a OL p Wus CL y S Gi x Y S 0 uz y 0 L L gt uo r e p 6 Sparepartslist 1 AE 5 0 0 640102 1 Ipackingset_ 1 ie 1 1 1 1 1 5 40 640101 1 plastic protection cover 10x 6mm 760 0 810014 1 retainer complete 11 x2Imm 70 0 640077 part no see the following pages When ordering nozzles needles and air caps please indicate nozzle dimension Available dimensions 0 2 0 3 0 5 0 8 1 0 1 2 1 5 2 0 and 2 5mm Y In standard version all o rings are made from viton Measurements of o rings inner diameter x thickness 6 1 Part no for needles nozzles and air caps needle KLS complete nozzle KLS 2mm 5mm Omm air cap flatspray 60 KLS standard version escription or nozzle 0 2 1 0mm or nozzle 1 2 1 5mm or nozzle 2 0mm air cap roundspray 15 KLS escription or nozzle 0 2 1 0mm or nozzle 1 2 1 5mm or nozzle 2 0mm 5 2 way solenoid valve part no description solenoid va
9. the smaller piston surface closes the needle The spring 9 6 3 during the normal use of valve is not in function Only when the air pressure supply is defective or switched off this spring closes the needle This guarantees that no fluid comes out from the nozzle during working interruptions or when air supply should fail or any other reason To prevent fluid to form drops instead of being atomized the MKDD IS work with pre air and purging air The time of purging air can be regulated individually Turning the adjusting screw 10 4 0 with a screwdriver the time of purging air will be regulated as under turning clockwise longer purging air turning anticlockwise Shorter purging air Set working pressure of atomizing air and fluid pressure according to required droplet sizes The spray jet can be intermittend or continouosly Controlled by the 5 2 way solenoid valve 17 0 0 the control air impulses M5 connection draw no 21 0 0 are led to the piston Set the control air according to the speed of intermittents From 5 intermittents per second on the control air has to be at least 5 bar 4 Installation The spray valve MKDD IS can be installed in any position The distance to the application surface depends on the width of application desired Vibrations of the valves caused by fast intermitting cycles require solid and massive installation Vibrations of the equipped machine to the valves
10. tive Use The automatic spray valves MKDD IS are pneumatically controlled spray valves They are suitable for continuously or intermittent use They are not suitable for spraying aggressive fluids like acid alkaline solutions cleaning agents chemicals etc In case of doubt please contact the manufacturer 2 3 Warning against danger This operating manual warns users of operations which may put their health at risk The warnings are indicated by combinations of text and symbols corresponding to the different danger classes WARNING Signs a possible dangerous situation If you don t avoid death or severe injuries can follow CAUTION Indicates a situation which may be dangerous Failure to heed the caution may result in personal injury This indication is also used where material damage is possible IMPORTANT Indicates tips for usage and other helpful information 3 Function Description The automatic spray valves MKDD IS are pneumatically controlled spray valves for application of fluids as f i glues adhesives fats colours etc The extreme short control air distance reached throw the direct mounted 5 2 way solenoid valve 17 0 0 givesthese valves very fast and exact needle 7 0 0 intermission cycles The needle piston receives to the larger piston surface air pressure from the 5 2 way solenoid valve This opens the needle When the air pressure to the larger piston is switched off the constant air pressure on
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