Graco 312781E Maintenance, Mix Manifold Valve Settings, Weekly, Daily

Maintenance

Mix Manifold Valve Settings

To open dispense or purge valves, turn hex nut (E) counterclockwise. To close, turn clockwise. FIG. 4.

E

TI11581a

FIG. 4. Dispense Valve Adjustment

Table 2: Mix Manifold Valve Settings

Valve	Setting	Function
Dose	Hex nut	Limits maximum fluid flow rate
	(E) 1-1/4	into integrator and minimizes
Purge
	turns out	valve response time.
	from fully
	closed
Shut-	Fully open	Closes component ports to
off	during	integrator during ratio check
	Run/Mix	or meter calibration. Open
	operation	ports during Run/Mix opera-
		tion.
Sam-	Fully	Open to dispense compo-
pling	closed	nents while calibrating
	during	meters. Do not open sampling
	Run/Mix	valves unless fluid shutoff
	operation	valves are closed.

Maintenance

To reduce the risk of injury, including fluid injection, fol- low the Pressure Relief Procedure in your proportion- ing equipment manual before cleaning, checking, or repairing equipment.

Weekly

•Clean and inspect the integrator mixer assembly. Follow Remove the Integrator Mixer, page 10. Ensure that the mixer (46) holes are not clogged. The cleaning frequency required depends on the fluid being mixed.

•Clean and inspect fluid and air filters.

Daily

•Purge the mixing system at the end of production.

•Check and refill fluid supplies for all components and solvent.

•Inspect the manifold and fluid line components for leaks.

•Make sure meter cables and air pilot lines are securely connected.

•Check that there is no fluid in the air purge line.

Preventive Maintenance

Schedule

At least once a year, take apart the mix manifold and dose/purge valves and sampling valves. Clean and inspect them. Replace o-rings and seals. Repair kits are available from Graco. See Repair, page 10.

8 312781E