172-65613A-03 (DR8-3P/DR8-3EP/DR8-6P/DR8-6EP) 11 Jun 2020
18
Reassembly
Reassemble the unit using the same procedure as used for disassembly; but in
reverse order. In addition, observe the following precautions:
1. The diaphragm and the protective sheet also perform the role of gaskets and
may be re-used if free from cracks, deterioration or deformation. If any
abnormalities are found, these parts need to be replaced. The protective
sheet must fit to the groove of the body. Make sure that the convex portion
of the diaphragm faces up.
Protective Sheet
Diaphragm
2. Make sure there are no scratches or erosion on the surface of the valve seat
section of the body and seating surface of the valve, as this will lead to leakage.
If no abnormalities are found, these parts can be reused. When there are
scratches or erosion on these parts, the body and/or valve need to be replaced.
Viewing the valve seat section
of the body from the inlet side
Valve
Seating
surface
3. The retainer gasket may be re-used if it has no cracks or deterioration. If any
abnormalities are found, it needs to be replaced.
4. Applying anti-seize to all non-wetted threaded parts is recommended.
Threaded portion of
the valve
Adjustment Screw
Threaded portion of
the spring retainer
5. Standard torques for fastening the respective screws and the width across
flats of the tools to be used are as follows:
Part
Torque
Distance Across Flats
N
m
(lbf
ft)
mm
(in)
High Nut
3
(2.2)
14
(
9
/
16
)
Body Clamp Nut,
Inlet Clamp Nut
3
(2.2)
17
(
21
/
32
)
(1 N
m
10 kg
cm)
NOTE: If drawings or other special documentation were supplied for the product, any
torque given there takes precedence over values shown here.
