This short video demonstrates step by step how to disassemble, clean, and reassemble an EV220B normally closed (NC) solenoid valve:
1. Disconnect the power by dismounting the plug.
2. Remove the coil from the valve body.
3. Mark the valve before disassembly.
4. Disassemble the armature system and lift it off, while holding the armature.
5. Inspect the armature plate for dirt and clean if necessary, using a clean cloth.
6. Check inside the armature for dirt.
7. Remove and clean the O-ring.
8. Unscrew the equalizing orifice, check the orifice hole, and clean if necessary.
9. Disassemble the valve top cover.
10. Check the pilot orifice.
11. Dismount the diaphragm and spring, and clean the diaphragm and valve body.
12. Check the two O-rings are in place and mount the diaphragm (metal disc up) and spring (widest part on diaphragm).
13. Reassemble the valve top cover.
14. Insert the O-ring and spring, with the tight windings at the top.
15. Reassemble the armature system and equalizing orifice.
16. Check the O-ring, and check the armature functionality with a permanent magnet.
17. Mount the coil and plug.
Remember: never remove a coil or disassemble a plug with voltage applied.
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