172-65188M-08 (
M-COS 3,16,21
Pressure Reducing Valve) 24 Jun 2015
31
Reassembly
Assemble the unit using the same procedure as used for disassebling it; but in
reverse order. Observe the following precautions:
1. The PTFE gaskets may be re-used if free from fault, crushing or deformation.
2. Apply anti-seize to the threaded portion of screws and bolts, the spring retainer,
ball and adjustment screw. Apply a small amount of anti-seize to the threads of
the main valve seat, pilot valve seat and pilot screen holder. Apply anti-seize
carefully to ensure it does not come into contact with other parts.
3. Fasten the bolts one at a time in an alternating diagonal pattern to provide uniform
seating.
4. After assembly, make sure that the piston and the pilot guide operate smoothly
without binding.
Tension Ring
Assembling the Piston Ring
Ring Gaps
Piston Ring
1) Fit the piston ring to the outside of the tension ring.
2) The ring gaps should be opposite each other.
5. Standard fastening torque and the width across flats for the to tools be used are
as follows:
Part
M-COS
Connection
Size (mm)
Distance Across
Flats (mm)
Tightening Torque
(N
⋅
m)
Bolt for Mounting Plate/
Spring Housing
All
13
20
Bolts for
Spring Housing / Pilot Body
All
17
40
Pilot Valve Seat
All
19
70
Pilot Screen Holder
All
24
40
Bolt for
Pilot Body / Main Body
Size 15 – 40
17
60
50 – 80
19
70
100
24
150
Bolt for
Main Body/Trap Body
Trap Body/Trap Cover
15 – 40
17
60
50 – 80
19
70
100
24
150
Main Valve Seat
(Bolt for 65 – 100 mm)
15, 20
36
100
25
41
125
32, 40
60
250
50
70
300
65, 80
13
30
100
17
40
Bolt for Float Cover
15, 20
8
7
25 – 40
10
10
50 – 100
13
20
Trap Valve Seat
15, 20
11
10
25 – 40
13
15
50 – 80
17
40
100
19
55
(1 N
⋅
m
≈
10 kg
⋅
cm)
NOTE: -If a torque greater than that recommended is applied, the body or components may
be damaged.
-Coat all threaded portions with anti-seize.
-If drawings or other special documentation were supplied for the product, any torque
given there takes precedence over values shown here.
