Befrag OPTIMA 650 I S, Service Manual, Page: 1 / 4

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SERVICE MANUAL OPTIMA 650i S
1. Usage as directed
Compressed air operated Paint Spray apparatus for normal pressure usage of 2,0 - 2,5 bar ( 28 - 35 PSI ) for the application of fluid,
spayable materials with regard to all manufacturer instructions. The user operates the Paint Spray apparatus by hand for coating of
the work piece.
2. Connection data
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Max. permissible pressure 6,0 bar ( 85 PSI ). Recommended working pressure 2,0 - 2,5 bar ( 28 - 35 PSI ).
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Max. permissible material temperature in operation without gloves 40 ° Celsius.
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Max. permissible material temperature in operation with gloves 60 ° Celsius.
3. Material flow rate data:
The measurements are based on the following data:
Working pressure: 2,5 bar ( 35 PSI )
Size of nozzles: 1,4 mm
Material viscosity: 18 s DIN 4mm/20 ° Celsius
Indicated data:
Material flow rate: 295 g / min
4. Air consumption
Air consumption for example in case of a Paint Spray apparatus with a nozzle size of 1,4 mm.
Round jet: Flat jet:
2,0 bar ( 28 PSI ) = 5,7 cbm / h = 96,0 l / min 2,0 bar ( 28 PSI ) = 11,5 cbm / h = 193,0 l / min
2,5 bar ( 35 PSI ) = 6,7 cbm / h = 113,0 l / min 2,5 bar ( 35 PSI ) = 13,6 cbm / h = 228,0 l / min
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5. SERVICE MANUAL
5.1. Putting into operation
Air connection: On the swivelling coupler 3648
Paint pot connection: Suction pot is to be turned on pot connection.
Before first operation: Operate Spray Gun with thinner to remove any oil from manufacturing.
5.2. Material flow adjustment
The quantity of material flow rate is regulated by turning the material adjustment screw no. 1393-9
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Clockwise rotation - turn adjustment screw to the right - decrease material flow.
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Counter clockwise rotation - turn adjustment screw to the left - increase material flow.
5.3. Regulation of spray jet width
The width of spray jet is infinitely variable from flat jet to round jet by turning fan adjustment screw no. 1393-18.
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Right-hand rotation ( clockwise ) _ round jet
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Left- hand rotation ( counter clockwise ) _ flat jet.
6. EXCHANGE OF COMPLETE NOZZLE SET
6.1. Dismantling of paint needle
a) Release lock nut material adjustment no. 1393-8
b) Unscrew material adjustment screw no. 1393-9
c) Take out needle tension spring no. 1143-9
c) Pull back trigger complete no. 1393-U6
e) Pull out paint needle complete no. 1393-U2 backwards.
6.2. Dismantling of fluid nozzle - air cap
a) Unscrew air cap no. 1393-U3
b) Release and unscrew fluid nozzle no. 1393-3 with a hexagonal wrench SW 14 mm.
6.3. Assembly
a) Screw in and tighten fluid nozzle no.1393-3
b) Mount air cap no. 1393-U3 and tighten it.
c) Insert paint needle no. 1393-U2
d) Mount needle tension spring no. 1143-9
e) Screw in material adjustment screw no 1393-9
f ) The quantity of material flow rate is regulated by turning the material adjustment screw no. 1393-9.
g) Tighten lock nut material adjustment no. 1393-8
7. Needle seal no. 151-43
a) Dismantle trigger complete no. 1393-U6 by removing all locking washers at trigger pin no. 1393-12 and driving axis no. 1393-13
b) Remove needle as stated under point
6.1.
c) Unscrew the needle tension screw no. 111-35
d) Exchange the needle seals no. 151-43, screw in needle tension screw no. 111-35, fit needle again, tighten needle tension screw
slightly, needle must be movable by hand.