AD5622VT Diaphragm Valve User Guide

8.3 To Change or Lubricate Piston O-ring 1. Remove the fluid housing (2). 2. Remove the diaphragm (3).

3. Remove the stroke control knob (8) and spring (9). 4. Remove the retainer ring (5) and anti-rotating washer (6). 5. Remove the piston assembly (11). 6. Replace O-ring (4) if damaged; otherwise lubricate O-ring with O-ring grease. 7. Reinstall piston, retainer ring and anti-rotating washer.

8. Reinstall spring and stroke control knob. 9. Reinstall diaphragm and fluid housing.

Figure 6.0

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