installation and maintenance manual series vxz 2 port solenoid valve this manual should be read in conjunction with the current valve catalogue for future reference, please keep this manual in a safe place safety instructions these safety instructions are intended to prevent a hazardous situa- tion and/or equipment damage.these instructions indicate the level of potential hazard by label of caution, warning or danger. to ensure safety, be sure to observe iso4414 (note1) , jis b 8370 (note2) and other safety practices. note 1: iso 4414: pneumatic fluid power C recommendations for the application of equipment to transmission and control systems. note 2: jis b 8370: pneumatic system axiom. caution : operator error could result in injury or equipment damage. warning: operator error could result in serious injury or loss of life. danger : in extreme conditions, there is a possible result of serious injury or loss of life. warning 1. the compatibility of pneumatic equipment is the respon- sibility of the person who designs the pneumatic system or decides its specifications. since the products specified here are used in various operating conditions, their compatibility for the specific pneumatic system must be based on specifications or after analysis and/or tests to meet your specific requirements. 2. only trained personnel should operate pneumatically operated machinery and equipment. compressed air can be dangerous if an operator is unfamiliar with it. assembly, handling or repair of pneumatic systems should be performed by trained and experienced operators. 3. do not service machinery/equipment or attempt to remove component until safety is confirmed. 1) inspection and maintenance of machinery/equipment should only be performed after confirmation of safe locked-out control positions. 2) when equipment is to be removed, confirm the safety process as mentioned above. switch off air and electrical supplies and exhaust all residual compressed air in the system. 3) before machinery/equipment is re-started, ensure all safety measures to prevent sudden movement of cylinders etc. (bleed air into the system gradually to create back-pressure, i.e. incorporate a soft-start valve). 4. contact smc if the product is to be used in any of the following conditions: 1) conditions and environments beyond the given specifica- tions, or if product is used outdoors. 2) installations in conjunction with atomic energy, railway, air navigation, vehicles, medical equipment, food and beverage, recreation equipment, emergency stop circuits, press applications, or safety equipment. 3) an application which has the possibility of having negative effects on people, property, or animals, requiring special safety analysis. caution ensure that the air supply system is filtered to 5 micron. o n.c p normally closed type (fig 1) specifications model/valve specifications flow rate coefficient min max. operating pressure difference mpa (kgf/cm 2 ) max. orifice effective operating water air oil system weight port size dia cv orifice model pressure pressure g (note) mm ? (mm 2 ) difference ac dc ac dc ac dc mpa mpa {kg/cm 2 } {kgf/cm 2 } 1/4 10 1.9 34 VXZ2230-02 1.0 0.7 1.0 0.7 0.7 0.7 550 (10.2) (7.1) (10.2) (7.1) (7.1) (7.1) 3/8 10 2.4 43 VXZ2230-03 1.0 0.7 1.0 0.7 0.7 0.7 550 (10.2 (7.1) (10.2) (7.1) (7.1) (7.1) 1/2 15 5.3 95 VXZ2240-04 0 1.0 0.7 1.0 0.7 0.7 0.7 1.5 760 (10.2) (7.1) (10.2) (7.1) (7.1) (7.1) (15.3) 3/4 20 9.2 165 VXZ2350-06 1.0 1.0 1.0 1.0 0.7 0.7 1,300 (10.2) (10.2) (10.2) (10.2) (7.1) (7.1) 1 25 12 215 VXZ2360-10 1.0 1.0 1.0 1.0 0.7 0.7 1,480 (10.2) (10.2) ( 10.2) (10.2) (7.1) (7.1) note: values for the grommet type. add 10g for the conduit type, 30g for the din connector type, and 60g for the terminal type. solenoid specifications model power frequency apparent power va power consumption temp. rise c supply hz inrush holding w (holding) (rated voltage) VXZ22 ac 50 60 (53) 18 7.5 60 60 51 (44) 12 6 50 dc - - - 8 60 VXZ23 ac 50 80 21 11 65 60 67 17 9.5 60 dc - - - 11.5 65 note: the return voltage is 20% or more of the rated voltage for ac and 2% or more for dc. the allowable voltage fluctuation rate is 10% of the rated value for both ac and dc. when the ambient temperature is 20c 5c and rated voltage is applied. coil change from ac to dc or dc to ac is impossible because the iron core shapes are different. the apparent power in the parentheses is for VXZ2230. din connector wiring (fig 6) the electrical connections for the din connector are shown in fig 6. note: minimum wire diameter is 0.5mm 2. to prevent damage due to surge voltage fit a voltage suppresser in parallel with the solenoid valve. leakage voltage should be kept to within 20% or less of the rated voltage for ac, 2% or less of the rated voltage for dc. 044a/eng installation warning ensure all air and power supplies are isolated before commencing installation. do not install these valves in explosive atmospheres. if a valve is exposed to oil and/or water droplets ensure that it is pro- tected. if it is intended to energise a valve for an extended period of time please consult smc. this valve is not intended to be used as a 'dump' valve. fig 1 fig 3 fig 4 fig 5 fig 6 symbol out in p n.o o normally open type (fig 2) detail drawing n.c/n.o. (fig 5) model/valve specifications flow rate coefficient min max. operating pressure difference mpa (kgf/cm 2 ) max. orifice effective operating water air oil system weight port size dia cv orifice model pressure pressure g (note) mm ? (mm 2 ) difference ac dc ac dc ac dc mpa mpa {kg/cm 2 } {kgf/cm 2 } 1/4 10 1.9 34 VXZ2232-02 0.7 0.6 0.7 0.6 0.7 0.6 600 (7.1) (6.1) (7.1) (6.1) (7.1) (6.1) 3/8 10 2.4 43 VXZ2232-03 0.7 0.6 0.7 0.6 0.7 0.6 600 (7.1) (6.1) (7.1) (6.1) (7.1) (6.1) 1/2 15 5.3 95 VXZ2242-04 0 0.7 0.6 0.7 0.6 0.7 0.6 1.5 850 (7.1) (6.1) (7.1) (6.1) (7.1) (6.1) (15.3) 3/4 20 9.2 165 VXZ2352-06 0.7 0.6 0.7 0.6 0.7 0.6 1,370 (7.1) (6.1) (7.1) (6.1) (7.1) (6.1) 1 25 12 215 VXZ2362-10 0.7 0.6 0.7 0.6 0.7 0.6 1,550 (7.1) (6.1) (7.1) (6.1) (7.1) (6.1) note: values for the grommet type. add 10g for the conduit type, 30g for the din connector type, and 60g for the terminal type. solenoid specifications model power frequency apparent power va power consumption temp. rise c supply hz inrush holding w (holding) (rated voltage) VXZ22 ac 50 66 (60) 20 8 55 60 57 (51) 15 6.5 45 dc - - - 8 50 VXZ23 ac 50 93 25 11 60 60 79 20 9.5 50 dc - - - 11.5 55 note: the return voltage is 20% or more of the rated voltage for ac and 5% or more for dc. the allowable voltage fluctuation rate is 10% of the rated value for both ac and dc. when the ambient temperature is 20c 5c and rated voltage is applied. coil change from ac to dc or dc to ac is impossible because the iron core shapes are different. the apparent power in the parentheses is for VXZ2232. symbol out in fig 2 construction o n.c p normally closed type (fig 3) 9 5 8 6 3 2 4 1 in out parts list no. description material standard option 1 body brass/bc6 sus 2 bonnet brass sus 3 o ring nbr fpm/epr 4 diaphragm assembly susnbr susfpm/susepr 5 core assembly suscopper sussilver 6 armature assembly susnbr susfpm/susepr 7 holder assembly pomnbr susfpm/susepr 8 return spring sus - 9 coil assembly b-mold h-mold j collar sus - construction p n.o o normally open type (fig 4) in out parts list no. description material standard option 1 body brass/bc6 sus 2 bonnet brass sus 3 o ring nbr fpm/epr 4 diaphragm assembly susnbr susfpm/susepr 5 core assembly suscopper sussilver 6 armature assembly susnbr susfpm/susepr 7 holder assembly pomnbr susfpm/susepr 8 return spring sus - 9 coil assembly b-mold h-mold j collar sus - 1 4 2 3 8 7 5 9 j o n.c p normally closed type p n.o o normally open type common parts core assembly rod for spring return spring armature assembly bolt bonnet diaphragm assembly body retainer collar (n.o only) name plate coil assembly wave washer o-ring core assembly shaft holder assembly return spring with din connector ground terminal no. 1 2 din connector + - din connector: d o n.c p normally closed type p n.o o normally open type fig 7 g (pf) 1 / 2 g (pf) 1 / 2 in in cable: ?6~9 cable: ?6~9 width across flats: 22 width across flats: 22 http:///
solenoid coil r eplacement (fig 13) replacement is the reverse of the above . w arning it is no t possible to change a coil from a c to dc or from dc to a c due to the differences in the iron core design. t he allow able voltage fluctuation is +/- 10% of the r ated v alue for both a c and dc . ca ution do no t 'ground' the pipe runs as this will cause electrolytic corrosion. do no t subject the coil to excessive force . when connecting piping apply a spanner to the outside of the pipe mounting area. t he solenoid v alve may be mounted in any orientation, but exercise caution when mounting in the inverted position as fluid will adhere to the iron core . avoid this mounting position if possible . should you require additional information please contact your local smc office , see details below . as the fluid is discharged through the pilot orifice , the pressure in the pressure action chamber decreases . t he force pushing the v alve down weak ens , allowing the upw ards pressure to overcome the said force , opening the main v alve . when the in port pressure is zero , or pressure is very low , the action force of the lift spring opens the main v alve . solenoid coil r emoval (fig 13) remove spring clip 1 and retain. lift off identification plate 2 and retain. lift off solenoid coil 3 . oper ation (figs 10, 11, 12) with the solenoid coil de-energised fluid enters the v alve via the in port and fills the pressure action chamber . t he main v alve remains closed via the action of the force pushing the v alve down, and the reaction of the return spring. when the coil is energised the armature is attr acted and the pilot orifice starts to open. t he fluid in the pressure action chamber flows through the pilot orifice to the out port. flow r ate char acteristics (air) (fig 8) air secondary pressure (p 2 ) kgf/cm 2 supply pressure p 1 9.9 kgf/cm 2 (p 1 +1.033) = (1~1.89) (p 2 +1.033) subsonic critical pressure sonic 1,000 2,000 3,000 ?10 s=34mm 2 1,000 2,000 3,000 4,000 ?10 s=43mm 2 2,000 4,000 6,000 8,000 10,000 ?15 s=95mm 2 5,000 10,000 15,000 20,000 ?20 s=165mm 2 5,000 10,000 15,000 20,000 ?25 s=215mm 2 VXZ223 -02 VXZ223 -03 VXZ224 -04 VXZ235 -06 VXZ236 -10 2 0 2 0 2 0 2 0 2 0 flow r ate q l /min how to r ead chart t he pressure in the sonic region for a flow r ate of 6,000 @@l /min (anr) is p 1 q 4.7 kgf/cm 2 for the orifice of 15 dia. (VXZ224 -04) and p 1 q 2.3 kgf/cm 2 for the orifice of 20 dia. (VXZ235 -06). 2 0 2 0 1 in subsonic region: ? f ormula with cv factor ? f ormula with effective orifice 2 in sonic region: ? f ormula with cv factor ? f ormula with effective orifice how to calculate flow r ate/air (p 1 +1.033) 3 1.89 (p 2 +1.033) fig 8 fig 10 fig 11 fig 12 fig 13 flow r ate char acteristics (w a ter) (fig 9) w ater fig 9 flow r ate q l /min pressure difference i p(p 1 -p 2 )kgf/cm 2 how to r ead chart t he pressure difference for a flow r ate of 25 l /min is i p q 0.5 kgf/cm 2 for the orifice of ?10 dia. (VXZ223 -03). how to calculate flow r ate/w ater 2 0 q : flow r ate (air l /min), (w ater l /min) i p : pressure difference (p 1 -p 2 ) p 1 : supply pressure (kgf/cm 2 ) p 2 : secondary pressure (kgf/cm 2 ) q : air temper ature ( c) s : effective orifice (mm 2 ) cv : cv factor ( / ) q : flow r ate (air l /min), (w ater l /min) i p : pressure difference (p 1 -p 2 ) p 1 : supply pressure (kgf/cm 2 ) p 2 : secondary pressure (kgf/cm 2 ) q : air temper ature ( c) s : effective orifice (mm 2 ) cv : cv factor ( / ) ? f ormula with cv factor ? f ormula with effective orifice (smm 2 ) pressure action chamber return spring supply orifice in out pressure action chamber pressure action chamber armature pilot orifice lift spring out out in in 1 2 3 when you enquire about the product, please contact the following smc corpor ation : england phone 01908-563888 turkey phone 212-2211512 it al y phone 02-92711 germany phone 6103-402-0 holland phone 020-5318888 france phone 01-64-76-10-00 switzerland phone 052-34-0022 sweden phone 08-603 07 00 sp ain phone 945-184100 a ustria phone 02262-62-280 phone 902-255255 ireland phone 01-4501822 greece phone 01-3426076 denmark phone 8738-0800 finland phone 09-68 10 21 norw a y phone 67-12 90 20 belgium phone 03-3551464 poland phone 48-22-6131847 http:///
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