Emerson LR128 Manual de Instruções descarregar pdf (Página 16)

Type LR128

Diaphragm and Plug

Assembly Maintenance

The diaphragm and plug assembly can be replaced

as a single unit (a diaphragm cartridge) or individual

components within the assembly can be replaced.

When replacing individual components, inspect each

component for damage and wear and replace parts as

needed. See Figure 17 and Table 10 for the Diaphragm

Markings and Diaphragm Imprint Codes. Key numbers

for the following assembly and disassembly procedure

are referenced in Figures 9 and 12.

1. Place a screwdriver or similar tool through the hole

in the top plug (key 5).

2. Remove the anged nut (key 13) from the bottom

plug (key 11). This loosens the entire assembly.

Note

On 1 in. / DN 25 body remove the socket

head screw (key 129) and lock washer

(key 130) from the bottom plug.

3. Remove the bottom plug (key 11) and the bottom

plug O-ring (key 10).

4. Remove the diaphragm (key 9).

5. Remove the top plug O-rings (keys 14 and 70).

6. Check all components for damage or wear and

replace as necessary.

7. When reassembling, be sure to lubricate all

O-rings before installing and add a thread locking

compound to the threads of the top plug.

8. Reassemble in the reverse order. Hold the top

plug (key 5). Place the parts on the top plug in the

following order:

• O-ring (key 14)

• O-ring (key 70)

• Diaphragm (key 9)

• O-ring (key 10)

• Bottom Plug (key 11)

• Flanged Nut (key 13) [On 1 in. / DN 25 body,

lock washer (key 130) then socket head screw

(key 129)]

9. Tighten anged nut (key 13) to proper torque

(see Table 9).

10. Completely reassemble the unit according to the

assembly procedures provided on page 12.

Travel Indicator Assembly Maintenance

Travel indicator assembly key numbers are referenced

in Figures 7, 11 and 13. 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.

Figure 12. Diaphragm and Plug Assembly Components

FLANGED NUT

(KEY 13)

BOTTOM PLUG

(KEY 11)

DIAPHRAGM

(KEY 9)

TOP PLUG O-RING

(KEY 14)

TOP PLUG

(KEY 5)

O-RING

(KEY 70)

O-RING

(KEY 10)

W7394

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 27 28

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Emerson LR128 Manual de Instruções Página 16

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