Nova-Tech Pulsafeeder OMNI DC7 - Manual (Page 16)

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7.1 Diaphragm Removal & Reinstallation
1. Adjust the stroke setting to 0% and disconnect the power source to the drive motor.
2. Relieve all pressure from the piping system.
3. Close the inlet and outlet shutoff valves.
4. Place a pan underneath the pump head adaptor to catch any liquid leakage.
5. Note the orientation of the existing check valve components. Loosen the union nuts holding the
check valves and piping to the reagent head. Remove the check valve assemblies, drain and rinse
them, and set them aside in a safe place. Unscrew the union nuts completely from the regent head.
Figure 9, wet end components
Take all precautions described under the WARNINGS on page 14, Section 7 to prevent
environmental damage and exposure of personnel to hazardous materials.