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Graco g250 - page 1
308778L Instr uctions-P ar ts V olumetric Fluid Flo w Meter For precise metering of plural component fl uids and solvents. See page 2 f or model inf ormation, including maximum working pressure . Important Safety Instructions Read all warnings and instructions in this manual. Sav e th ese instr uctions. TI11579a Intrinsi call y Safe for Ha zardous ...
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Graco g250 - page 2
Models 2 308778L Contents Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Low Pressure Meter s . . . . . . . . . . . . . . . . . . . . . 2 High Pressure Meters . . . . . . . . . . . . . . . . . . . . . 2 W arnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Installation . . . . . . . . . . . . ...
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Graco g250 - page 3
Warnings 308778L 3 Wa r n i n g s The f ollowing warnings are f or the setup , use, grounding, mainten a nce, and repair of this equipment. The e xclama- tion point symbol ale r ts you to a ge neral warning and the hazard symbol ref ers to procedu re-specific risk. Ref er back to these wa r nings. Additional, product- specific w ar nings ma y be fo ...
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Graco g250 - page 4
Warnings 4 308778L EQUIPMENT MISUSE HAZARD Misuse can ca use death or serious injury . • Do not oper ate the unit when f atigued or under t he influence of drugs or alcohol. • Do not exceed the maximum w orkin g pressure or temperature rating of the lowest rated system component. See T echnical Data in all equipment man uals. • Use fluids and ...
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Graco g250 - page 5
Installation 308778L 5 Installation Dust and Foreign Matter A void h aving dust or foreign matt er enter the flow mete r by taking the f ollowing precautions: • Thoroughly flush the flui d supply lines bef ore install- ing the flo w meter . • When installing fittings, mak e s ure that no sealing tape overlaps into th e inside of t he pipe. • ...
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Graco g250 - page 6
Installation 6 308778L Gr ounding 1. Ground the fl ow met er b y connectin g a grounded cabl e to the sensor . Hav e a qualified electrician check the electrical groundin g continuity betw een the flow meter sensor and a true ear th ground; r emove t he cabl e connec- tor from the senso r and measure th e resistance from the cable connecto r Pin B ...
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Graco g250 - page 7
Operation 308778L 7 Operation Pressure Relief Pr ocedure 1. Shut off the fluid supp ly to the meter . 2. Shut off all electrical powe r to the fluid system. 3. F ollow the Pressure Relief Procedur e f or your fluid system d ispensing de vice . Flow Meter Function This is a positiv e displacement, gear flow meter . The gear flow meter is highly accu ...
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Graco g250 - page 8
Troubleshooting 8 308778L T r oubleshooting Bef ore ser vicing this equipment alw ays mak e sure to relie ve the pressure . NO TICE The sensor is not a serviceable part. Replace it if it is malfunctioning. Prob lem Cause Solution No flow volume displa yed at m onitor- ing unit. Flow v olume is too low to measur e. Increase flo w volume. Fluid is no ...
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Graco g250 - page 9
Maintenance 308778L 9 Maintenance Residue Build-up on the Meter Gear s Residue b uild-up may cause the meter gears to bind or stop rotating , which decreases the meter accur acy and mak es meter recalibra tion necessary . As more build-up occurs, recalibration is re quired more often. The frequency tha t your meter requires clean ing depends on the ...
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Graco g250 - page 10
Maintenance 10 308778L Cleaning or Servicing the Meter Chamber 1. Follo w the Pressure Re lief Procedure , on page 7. Then close the fluid shut-off valv e on each side of the meter . 2. Disconnect the cab le from the electronic sensor de vice. 3. Disconnect both flui d line fittings and remo ve the meter from t he fluid line. 4. Loosen the tw o scr ...
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Graco g250 - page 11
Parts 308778L 11 Pa r t s Flow Meter Kits, f or ProMix 2KS W all Fluid P anel 15V804 G3000 Meter Kit 15V827 G3000HR Meter Kit Ref. No. P ar t No. Description Qty 101 289813 METER, gear , G3000; used on 15V804; see p age 12 1 289814 METER, gear , G3000HR; used on 15V827; see page 12 1 104 501867 V AL VE, check 1 105 234628 HARNESS, cab le, wit h con ...
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Graco g250 - page 12
Parts 12 308778L Bare Meter Assemblies 289813 G3000 Meter , with 90° sensor connector 289814 G3000HR Meter , wi th 90° sensor connector * Not a replacement part. Order item 3, gear meter assembly . 1 T orque to 27-57 in-lb (3.1-6.4 N •m). T orque to 140-170 in-lb (15.8-19.2 N•m). 1 2 TI11580a 1 2 4 5 7 8 9 10 11 Item 3, Ge ar Meter Assembly i ...
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Graco g250 - page 13
Parts 308778L 13 239716 G3000 Meter 244292 G3000HR Meter * Not a replacement part. Order item 3, gear meter assembly . T orque to 27-5 7 in-lb (3.1-6.4 N•m). T orque to 140-170 in-lb (15.8-19.2 N•m). 1 2 TI7381a Item 3, Ge ar Meter Assemb ly includes items 4-11 2 2 4 5 7 8 9 10 11 1 1 Ref. No. P ar t No. Descr iption Qty . 1 114100 SCREW , sock ...
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Graco g250 - page 14
Parts 14 308778L 249426 G250 Meter 249427 G250HR Meter * Not a replacement pa r t. Order item 22, gear mete r assembly . 1 T orque to 27-5 7 in-lb (3.1-6.4 N•m). T orque to 140-170 in-lb (15.8-19.2 N•m). 1 2 TI11580a 1 2 4 5 7 8 6 11 Item 22, Gear Meter Assemb ly includes items 1-11 2 21 20 Ref. No. P ar t No. Descr iption Qty . 1 111308 SCREW ...
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Graco g250 - page 15
Dimensions 308778L 15 Dimensions G3000 and G3000HR Mounting Holes (bottom vie w) P ar t Nos. 289813 and 289814 P ar t Nos. 239716 and 244292 G250 and G250HR Mounting Hole s (bottom vie w) P ar t Nos. 249426 and 24942 7 1.73 in. (43.94 mm) M6 M6 1.73 in. (43.94 mm) 1/4-18 npt(f) inlet/outlet 1/4-18 n pt(f) inlet/outlet 1/4-18 npt(f) inlet/outlet 2.4 ...
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Graco g250 - page 16
Technica l Data 16 308778L T e c hnical Data * F or most commonly used coatings, the flow meter reading will be accur ate to within +/- 0.5%. Accuracy will dimin- ish at low viscosities and low flow r ates. Maximum Fluid W orking Pressure G3000 an d G3000HR . . . . . . . . . . . . . . . . . . . . . . . G250 and G250HR . . . . . . . . . . . . . . . ...
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Graco g250 - page 17
Pressure Drop Curve 308778L 17 Pressure Dr op Cur ve G3000/G250 PSI 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0 .8 0 .9 1.0 1.1 G3000HR/G250HR GAL/MIN GAL/MIN 0.0 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 500 cps 400 cps 300 cps 200 cps 100 cps 50 cps 800 cps 3000 cps 2000 cps 1500 cps 1000 cps ...
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Graco g250 - page 18
All written and visual data contained in this document reflects the latest product information available at the time of publica tion. Graco reserves the right to make changes a t any time without notice. This manual contains English. MM 308778 Graco Headquarters: Minneapolis International Offices: Belgium, China, Japan, Korea GRACO INC. P.O. BOX 14 ...
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