Ratio Checking, Install Disposable Static Mixer

Ratio Checking

NOTE: Use ratio check nozzle 255247 with retaining nut 512292. Purchase separately.

The output mix ratio of your proportioner can be checked by dispensing the two fluids separately out of the nosepiece into tared cups. The cups can then be weighed and the weights divided to get the mix ratio by weight.

Ratio checks provide information about the ratio of an overall sample. Transient problems (soft spots) caused by starting and stopping the flow (lead-lag) may not show up in this kind of ratio check. Physical tests of the mixed fluid are the best check of correct ratio and mix quality.

Install Disposable Static Mixer

1.Perform Pressure Relief Procedure, page 10.

2.Use lever (H) to close the dispense valve inlet ball valves (J).

3.Coat threads of outlet manifold (F) with grease to prevent material curing on threads.

4.Install static mixer and secure with nut (G).

Dispense

1.If it is possible that air may be in the fluid lines, per- form Prime procedure on page 8.

2.If the gun has not yet been pressure balanced, per- form Pressure Balance the Gun procedure on page 8.

3.If the fluid in the static mixer is cured or there is no static mixer installed, Install Disposable Static Mixer, page 9.

4.Start proportioner and adjust to desired pressure. See proportioner manual for instructions.

Operation

NOTE: Use the lowest proportioner pressure setting that produces the desired flow.

NOTICE

If the proportioner pressure setting is too high, any dif- ferences in viscosity will cause a pressure differential that will result in improper mixing.

5.Use lever (H) to open and close dispense valve inlet ball valves (J) as desired to dispense materials.

NOTICE

Always open and close lever (H) fully and quickly. Opening the valve partially or slowly will cause soft spots in the material and may shut down the propor- tioner because of a pressure imbalance.

6.If stopping dispensing for longer than the cure time of the materials:

a.Use lever (H) to close dispense valve inlet ball valves (J) as desired to dispense materials.

b.Keep static mixer installed.

c.When ready to dispense again, Install Dispos- able Static Mixer, page 9.

7.When done using the dispense valve for the day, perform Daily Shutdown on page 10.

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