Component Identification

Catalyst Pump

The catalyst pump supplies catalyst to the spray gun.

Pump arm (U): controls catalyst flow.

Ratio adjustment knob (V1): use to lock/unlock pump position and adjust the resin to catalyst ratio. It is easiest to adjust the ratio when the pump is at the bottom of the stroke.

Pivot point (V2): when pump is moved to adjust ratio, this point stays stationary.

High pressure relief valve (W): directs catalyst to gun or back to tank to relieve pressure. It also automatically relieves pressure if it exceeds normal working pressure.

Fluid pressure gauge (X): indicates catalyst fluid pres- sure.

Fluid inlet (Y): fluid inlet from the catalyst reservoir.

Fluid Inlet Ball Valve (Y2): controls flow of catalyst to the catalyst pump.

V1

U

W

Z2

Z

X

Z3

 

Y

V2

Y2

U

ti21340a

Weep line (Z): In the event of a throat seal failure, the fluid will flow into the weep line and back to the catalyst reservoir.

Fluid outlet (Z1): fluid out to the gun.

Fluid recirculation/high pressure relief (Z2): fluid out- let to the catalyst reservoir.

Low pressure relief valve (Z3): External mix systems only. Directs catalyst to gun or back to tank to relieve pressure.

Z1

Z2

Z

Z3

ti21342a

FIG. 3: Catalyst Pump Components

14

3A2012J

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Graco ti18526c, ti18524d, ti18496b specifications Catalyst Pump Components