TECHNICAL NOTE
Earlier version of valve assemblies P-043, P-543 & P-643 could be disassembled.
An opening at the top of the actuator allowed to use the Allen key to detach the actuator cap.
Improvements were made to some components.
The new version of valve assemblies can no longer be disassembled
in order to make the new design fully compatible with all tools.
Attempt to disassemble the new valve assembly will damage the components.