Emerson EZH and EZHSO Series Pressure Reducing Regulators Manual de instrucciones descargar pdf (Pagina 20)

EZH and EZHSO Series

Figure 7. EZH Series Travel Indicator Assembly

EZH Series Travel Indicator Maintenance

A new and improved travel indicator has been phased

in during 2013. The new version improves the O-ring

stem seal to minimize leakage and extend service life.

The components of the legacy and new versions are

not interchangeable. If maintenance is performed on

the new travel indicator, it is recommended to replace

the entire travel indicator assembly with the new

version. Part numbers for the assemblies are shown in

the parts list. Figure 7 shows the difference between

the designs. The spare parts kits will support either

design. Take care to use the correct O-ring (key 142A

or 142B) when performing maintenance, see parts list

for the appropriate part number.

1. Remove plastic travel indicator cover (key 138).

2. Loosen travel indicator bushing (key 140) and

remove it by sliding it over the travel indicator stem

(key 139).

3. Remove indicator tting (key 141) and inspect

O-ring (key 143). Remove O-ring (key 142B) and

back-up rings (key 160). Replace and lubricate

O-ring if damaged. Pull up on the travel indicator

stem (key 139) to force the spring collet (key 144)

out of the diaphragm head groove. Examine

these parts and the stem for wear and replace

if necessary.

4. Examine the retaining ring (key 145) for wear and

replace if necessary.

5. Insert the travel indicator stem (key 139) and

spring collet (key 144) back into the diaphragm

head groove. Replace the indicator tting

(key 141) and O-ring (key 143) and tighten with a

referenced torque of 3.7 ft-lbs / 5.0 N•m.

6. Lubricate the O-ring (key 142B) and back-up rings

(key 160, 2 required). Place one back-up ring on

the stem (key 139) followed by the O-ring and then

the other back-up ring. Push into groove of the

indicator tting (key 141).

7. Slide the travel indicator bushing (key 140) over

the travel indicator stem (key 139) and tighten

rmly in place.

8. Replace the travel indicator cover (key 138) and

tighten rmly in place.

APPLY LUBRICANT (L) / SEALANT (S)

(1)

L2 = SILICONE-BASED GREASE

S2 = ANAEROBIC METHACRYLATE SEALANT FOR THREADS

1. Lubricant and sealant must be selected such that they meet the temperature requirements.

P1766

IMPROVED TRAVEL INDICATOR DETAIL

TOP VIEW

138

139

140

141

LEGACY TRAVEL INDICATOR DETAIL

143

140 140

142A

138

139

140

141

143

160

145

144

145

144

TOP VIEW

142B

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 39 40

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Emerson EZH and EZHSO Series Pressure Reducing Regulators Manual de instrucciones Pagina 20

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