1
Item
Description
1
Diaphragm engaged with the bonnet recess
Figure 22: Diaphragm Slot Alignment
9.
Rotate the bonnet clockwise until reaching a hard stop.
1
2
Figure 23: Mount and Turn Positions
10. Release the lock pin so that it is free to travel when cover is rotated. Audible "clicking" will be heard
as the pin engages the bonnet ratchet mechanism.
1
Figure 24: Lock Pin Positions
2
Item
Description
1
Lock-pin in (released)
2
Lock-pin extended (can be locked in this position with
90 degree rotation of pin)
11. Rotate the cover clockwise until the studs are snugly engaged with the bonnet. If the cover will not
turn, then:
a) Lift the cover while applying generous clockwise force. This will overcome the internal lock fea-
ture that engages when excessive counter clockwise force is applied to the cover.
12. Inspect the orientation of the bonnet, body, backing cushion and diaphragm to ensure they are
aligned. If required, loosen the cover (after securing the lock pin in an outboard position) and reor-
ient components before tightening.
13. Ensure that the lock pin is in the released position (audible clicking when cover is turned).
14. Tighten the cover. See table below for specific instructions.
4.3 Assemble the EnviZion Valve
EnviZion and BioviZion Valves Installation, Operation, and Maintenance Manual
17