Operating manual for extrusion valve MMDV LV/KV
Contents
1. Operating manual for extrusion valve MMDV LV KV Ns a Read this manual carefully before installing operating or servicing this equipment Keep always handy for further use 1 Introducion The extrusion valves of series MMDV LV KV are very fast acting valves for continuous or intermitted use They are suitable for the application of glues adhesives oils and sealing compounds With the long nozzles LV the valves can be sloped to each other such to achieve narrow nozzle distances Depending on nozzle dimension and material pressure fluids of different viscosities can be applied Extrusion valves are precision tools Always keep clean and observe minimum instructions to maintain a long useful 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 Definitive use The extrusion valve MMDV LV KV is a pneumatically controlled needle valve It is suitable for application of fluids especially glues and adhesives continuously or intermittent use They are not suitable for spraying aggressive fluids like acids alkaline solutions cleaning agents chemicals When you are not sure if your fluid is suitable for spraying please contact the manufacturer 2 3 Warning against danger This op2. Do not Turn the regulating knob 9 12 in anticlockwise turn any further IMPORTANT ua To avoid damages to nozzle and needle adjust decrease of fluid flow turning regulating knob 7 9 12 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 extent that both parts could be damaged It is harmless to leave fluid within the valve no connection to outside air if system stays under pressure 5 Repair and Maintenance Before starting maintenance or repair work ensure that all air operated tools are disconnected from the air supply WARNING AN Danger caused by combustible and noxious spraying material Safety instructions on fluid can and material data of fluid manufacturer must definitly be observed WARNING Before opening the spray valve it has to be disconnected from the air and fluid supply Otherwise ejected elements can cause danger The extrusion valves of series MMDV LV KV 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 applicatio
3. 21 00 for closing the needle 2 Hose for control air to screwed joint pivoting M5 21 10 for opening the needle 3 Hose for material to 1 4 connection 21 20 4 2 Operating instructions CAUTION Never point the spray jet 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 pot and material data of fluid manufacturer must definitly be observed The extrusion valve MMDV LV KV is working with a control air pressure of 6 bar and material pressures up to 30 bar If high material pressures are required please observe in any case the safety regulations of the employee s compensation departments The valve can apply the fluid in contact as well as in non contact to the surface Intermittend use as well as continuous use is possible The travel of needle is giving way to fluid as adjusted by the regulating knob 9 12 Turning this knob in anticlockwise turn more fluid clockwise turn less fluid One revolution of regulating knob 9 12 gives 0 5 mm more or less stroke Maximum stroke is 6 mm Do not over tight the regulating knob In this case the o ring 9 32 can t seal the lock 9 22 IMPORTANT The maximum fluid outlet is already reached when no further ratchets are noticeable
4. 10 Take out needle spring 8 10 and pull out needle 7 10 on back side of needle piston by using a flat tong Then using a screwdriver loosen retainer 6 00 till end of thread As retainer can not go through the thread of valve body 4 10 by itself because of o ring 5 30 it has to be carefully pushed through be means of a thin metal sheet of 0 5 1 0 mm placed between gun body recess and retainer After passing thread retainer is accessible for taking out of housing 5 5 Replacing new gaskets 1 IMPORTANT e Do not use metallical aid to remove and insert gaskets and gasket seats Gaskets and gaskets seats can be damaged In case a new retainer 6 00 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 20 is to be placed first into ground of the rear retainer bore O ring 5 30 then into the outer groove Insert the gasket 5 50 into the front retainer bore The gasket 5 50 is not symetrical The somewhat wider opening must be positioned to point to the front of spray valve i e after assemling retainer in direction nozzle Completed retainer 6 00 slightly greased then is put back into valve body 4 10 and without turning movement by means of a screw driver is to be carefully pushed through valve body thread observing outer o ring 5 30 Lastly screw retainer into housing thread tight
5. en only slightly When inserting o rings and gaskets do not use any sharp or pointed matallic implements Mainly the gasket as a very precise and sensitive component is not able to stand impacts Technical alterations reserved February 2003 F B C 124 AN 142 MMDV LV 89 MMDV KV 15mm 107 t 22 GL te 40 a t 15mm l fo Ov ed E 0 6 Sparepartslist 2 10 6 00 810014 1 retainer complete 11x2imm_ ratchet assembly 15 x 45mm com
6. erating 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 danger 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 Functional description The extrusion valve MMDV LV KV is a pneumatically controlled valve for application of fluids as f i glues adhesives fats colours oils etc The needlepiston receives alternately air pressure When control air is swiched off a spring close the needle into the nozzle The supply of fluid is to be obtained via pressure tank or pump The MMDV MV LV KV has an extrusion jet without atomizing air 4 Installation and opening operations The MMDV LV KV valve can be installed in any position Vibrations of the valve caused by fast intermitting cycles require solid and massive installation For solid attachment the valve body 4 10 is equipped with two drill holes M 5 thread Vibration of the equipped machine to the valve should be limited as far as possible 4 1 Hose connection Connect the three hoses not included as follows 1 Hose for control air to connection M5 draw no
7. n fluids only Control air should be slightly oiled 5 1 Cleaning To clean valve spray solvent until pure solvent leaves the nozzle Do not submerge entire valve in solvent At longer working interruptions it is advisable to clean needle 7 10 retainer 6 10 and nozzle 2 10 by putting these parts only into solvent If necessary use soft brush Moving parts and threads should always be greased slightly The 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 sufficient control air pressure is supplied 5 6 bar Check if o ring 6 20 or o ring 7 40 are defect Check if needle 7 10 is sticked together within retainer 6 10 Check if minimum of travel of needle is set Pee 5 3 Changing needle 7 10 and nozzle 2 10 Unscrew ratchet assembly 9 02 Unscrew nozzle 2 10 Take out needle spring 8 10 and pull out needle 7 10 on back side of needle piston by using a flat tong Re assemble new parts in reverse order slightly greased It is not recommended to use old needles and nozzles because even slightly damaged needle shafts would immediately cause leakage in gasket 5 50 5 4 Changing retainer 6 00 IMPORTANT Do not use metallical aid to remove and insert gaskets and gasket seats Gaskets and gaskets seats can be damaged Unscrew ratchet assembly 9 02 Unscrew nozzle 2
8. plete ratchet assembly 15 x 45mm 9 22 ock screw wrench size 13 x 26mm 2 o ring 4 47 x 1 78mm Viton straight pin DIN 6325 1 5 x 8 spring 0 8 x 8 5mm screw DIN 913 M3 x 3 stop unit core 6 6 x 4 x 5mm ipe fitting straight wrench size 8 x 19mm 220151 crewed joint pivoting M5 stainless steel ouble nipple stainless steel 1 4 AG 1 8 AG Qa 220114 Please find part numbers on next pages When ordering needles and nozzles please specify dimension Available dimensions 0 2 0 3 0 4 0 5 0 6 0 7 0 8 1 0 1 2 1 5 2 0 mm 6 1 part numbers for nozzles and needles nozzle LV stainless steel raw no part no __ description oS O 2 10 2 10 2 10 2 10 2 10 nozzle KV stainless steel needle LV tungsten carbide 110221 needle LV 0 2 0 3mm complete 710 110222 needle LV 0 4mm complete 710 110223 needle LV 0 5mm complete 110224 needle LV 0 6 0 7mm complete 710 110225 needle LV 0 8 1 0mm complete 710 110227 needle LV 1 2mm complete 7 10 110228 needle LV 1 5mm complete 7 10 110229 needle LV 2 0mm complete needle KV tungsten carbide 110230 needle KV 0 2 0 3mm complete 110231 needle KV 0 4mm complete 7 technical data measurements LV version approx 142mm x 15mm x 46mm KV version approx 124mm x 15mm x 46mm weight 265g control air pressure min 6 bar material pressure max 30 bar gaskets Viton Special design on request Technical al
9. terations reserved February 2003
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