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InDICaTOR COVER
(KEY 21)
BODY SIZE, nPS / Dn
1 or 1-1/4 x 1 / 25 or 32 x 25
2 x 1 or 2 / 50 x 25 or 50
3 / 80
4, 6 x 4 or 8 x 4 /
100, 150 x 100 or 200 x 100
6, 8 x 6 or 12 x 6 /
150, 200 x 150 or 300 x 150
8 / 200
• O-ring (key 14)
• O-ring (key 70)
• Diaphragm (key 9)
• O-ring (key10)
• Bottom Plug (key 11)
• Flanged Locknut (key 13)
9. R eassemble in the reverse order. Tighten flange
locknut (key 13) to proper torque (see Table 13).
Travel Indicator assembly Maintenance
Travel indicator assembly key numbers are referenced
in Figures 10, 14 and 18. The indicator assembly
can be removed and installed without removing the
bonnet (key 2) from the body (key 1). Travel indicator
maintenance is performed for two reasons:
a. When damaged or worn parts need replacing.
b. When travel indicator is removed and replaced
with a travel indicator plug assembly.
!
avoid personal injury or damage
to property from sudden release
of pressure or uncontrolled gas or
InDICaTOR FITTIng
(KEY 19)
HEx nUTS
(KEY 4)
InDICaTOR
O-RIng (KEY 6)
InDICaTOR
WaSHER (KEY 20)
Figure 10. Travel Indicator Parts
Table 13. Torque Values
Cap Screw
75 to 95 / 102 to 129
55 to 70 / 75 to 95
100 to 130 / 136 to 176
160 to 210 / 217 to 285
275 to 300 / 373 to 407
400 to 450 / 542 to 610
WaRnIng
UPPER SPRIng
SEaT (KEY 17)
O-RIng
(KEY 18)
BaCK-UP
RIngS
(KEY 16)
TORQUE, FT-LBS / N•m
Flange Locknut
4 to 6 / 5.4 to 8.1
90 to 160 / 122 to 217
6 to 8 / 8.1 to 11
90 to 160 / 122 to 217
19 to 25 / 26 to 34
200 to 300 / 271 to 407
19 to 25 / 26 to 34
200 to 300 / 271 to 407
50 to 100 / 68 to 136
300 to 425 / 407 to 577
90 to 110 / 122 to 149
300 to 425 / 407 to 577
other process fluid. Before starting
to disassemble, carefully release all
pressures according to the shutdown
procedure. Use gauges to monitor inlet,
loading and outlet pressures while
releasing these pressures.
1. R emove the indicator protector (key 22, Figure 14)
and indicator cover (key 21).
2. R emove the first hex nut (key 4) and the indicator
washer (key 20).
3. U nscrew the second hex nut (key 4) on the top of
the indicator stem (key 15). Do not remove.
4. Use a wrench to remove indicator fitting (key 19).
5. L ift out travel indicator assembly. If replacing travel
indicator with travel indicator plug, skip to step 9.
6. C ompress the main spring (key 12). Remove the
second hex nut (key 4). Parts will separate easily
when the hex nut is removed.
7. S lide the indicator stem (key 15) out of the
indicator fitting (key 19). The main spring (key 12)
and upper spring seat (key 17) will be free.
8. I f necessary, use the indicator stem (key 15) to pry
the back-up rings (key 16) and O-ring (key 18) out
of the indicator fitting (key 19).
Type EZR
MaIn SPRIng
(KEY 12)
InDICaTOR STEM
(KEY 15)
WaSHER (KEY 79)
(nPS 6 / Dn 150 SIZE OnLY)
Indicator Fitting
Indicator Plug
90 to 160 / 122 to 217
90 to 160 / 122 to 217
200 to 300 / 271 to 407
200 to 300 / 271 to 407
300 to 425 / 407 to 577
300 to 425 / 407 to 577
19
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