9
IOM-A-Deringer 40G/40GX/50G/50GX_6-8
2005
EDP#2916009
© 2020 Watts
Maintenance of Relief Valve (continued)
B
D
1. Check the rubber seal on the relief valve piston assembly (A) for
fouling or damage by making sure the indentation of the seat in
the rubber seal is present all the way around. (Confirm the relief
valve piston assembly (A) sets flush on relief valve seat (B).
2. Check relief valve seat (B) for fouling or damage before
reinstalling the relief valve piston assembly (A).
3. Once the relief valve is ready to be reassembled, the first step is
to reform and reattach the diaphragm to the piston.
4. Move the diagram (C) to the fully open position making sure the
embossed center is facing up.
5. While holding the diaphragm (C) with both hands, use your
thumbs to gently push down on embossed center (D) so the
diaphragm collapses into itself and forms a circle so that the
bottom of the piston assembly can be inserted into the
diaphragm and the embossed center can be pushed into
the piston assembly groove.
C
A
1. Place the piston assembly (A) into the diaphragm (B), making sure the
diaphragm lays flush on the bottom of the piston assembly with no
wrinkles or tears in the diaphragm.
2. Place the relief valve spring (C) back onto the relief valve assembly (A)
and slide the valve assembly back into the relief valve body (D). Make
sure the piston assembly lines up to penetrate hole (E) in top side of
relief valve.
B
A
E
D
C
