Graco BULLDOG HYDRA-CAT 208958, Instructions-Parts List Manual

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Operation
Proportioning Pump Chart
Displacement pump combinations for mix ratio, pres-
sure ratio and volume per cycle for each model.
CAUTION
With three displacement pump models, the outer two
displacement pumps must be identical models to
balance forces and avoid damaging the pumps.
Mix Part A Part B Part A Pressure
Ratio
(fluid to air) Volume per
Cycle
Gallon (liter) Fluid Pressure Developed
psi (MPa, bar)
at incoming air pressure of
psi (MPa, bar)
1:1 222012 222012 None 34:1* 0.046 (0.17) 2500 (17, 170)
74 (0.5, 5.2)
1-1/4:1 222019 222015 222019 38:1* 0.034 (0.13) 2500 (17, 170)
66 (0.4, 4.5)
1-1/2:1 222019 222017 222019 41:1* 0.038 (0.14) 2500 (17, 170)
61 (0.4, 4.2)
2:1 222012 222012 222012 23:1 0.068 (0.26) 2300 (16, 161)
100 (0.7, 7)
2-1/2:1 222012 222015 222012 24:1 0.064 (0.24) 2400 (16.8, 168)
100 (0.7, 7)
3:1 222012 222017 222012 25:1 0.061 (0.23) 2500 (17, 170)
100 (0.7, 7)
4:1 222012 222019 222012 27:1 0.057 (0.22) 2500 (17, 170)
93 (0.6, 6.4)
* Exceeds the pressure ratiing of the pumps.
Relief Valve Selection Table
To select the appropriate relief valve:
1. Determine the Maximum Pump Fluid Pressure of
your system.
2. Verify that all system components meet or exceed
the pressure ratings of the pressure relief valve
that you have selected.
3. Select the lowest pressure relief valve with a maxi-
mum working pressure that exceeds the Maximum
Pump Fluid Pressure.
Part
Number Working Pressure
Range psi (MPa, bar) Cracking Pressure
Range psi (MPa, bar)
Minimum Maximum Minimum Maximum
237060 475
(3.3, 33) 575
(4, 40) 710
(4.9, 49) 860
(5.9, 59)
237061 950
(6.6, 66) 1150
(7.9, 79) 1425
(9.8, 98) 1725
(11.9,
119)
237112 1400
(9.7, 97) 1800
(12.4,
124) 2140
(14.8,
148) 2590
(17.9,
179)
237062 1800
(12.4,
124) 2300
(15.9,
159) 2850
(19.7,
197) 3450
(23.8,
238)