6
VIII. DISASSEMBLY AND REASSEMBLY
A.
A 5/32” hex wrench fits the recessed seal screw
located at one end of the meter.
Turn the hex wrench counterclockwise until the seal screw is flush with the
inside surface of the end fitting. NOTE: If the meter does not have a tube
enclosure then the tube must be held to prevent it from falling from the meter
frame.
B.
Remove the Tube Cube from the frame by sliding it forward.
C.
Remove the tube from the cube.
1.
Remove the center seals form the Tube Cube and inspect for damage.
The flowmeter tube can be easily removed from the Tube Cube. NOTE:
NO FURTHER DISASSEMBLY SHOULD BE NECESSARY FOR
MAINTENANCE.
2.
Clean tube assembly (see CLEANING PROCEDURE).
D.
If complete disassembly is necessary, then continue as follows.
1.
Remove the retaining ring from the compression plug jack screw. (Do
not over stretch the ring)
2.
Push the jack screw and compression plug through the end fitting.
3.
Complete the disassembly of the o- rings and parts.
4.
Remove piping connectors/adapters.
5.
Clean all parts (see CLEANING PROCEDURE).
6.
Lubricate left hand thread on the jack screw and reassemble.
7.
Examine the o-rings for damage, lubricate and reassemble.
8.
Replace connector into seal fitting.
9.
Replace compression plug assembly so that the milled flat is toward the
piping connector.
10.
Replace retaining ring. NOTE: It is occasionally necessary to turn the
jack screw clockwise to lift the retaining ring groove sufficiently to insert
the retaining ring. Spread the retaining ring only enough to fit over the
jack screw.
11.
Replace the Tube Cube into the frame until the rear of the Tube Cube is
flush with the rear surface of the end fittings and tab stops.
12.
Tighten the compression plug. CAUTION: DO NOT OVER
TIGHTEN. See torque specifications listed below.
13.
Check meter for leaks.
Torque Specifications for compression plug:
Seal
Torque
Min
Max
Viton
18 in-lb
16 in-lb
20 in-lb
EPR
10 in-lb
8 in-lb
12 in-lb
Buna
16 in-lb
14 in-lb
18 in-lb
Teflon
24 in-lb
22 in-lb
26 in-lb
