Emerson EZH and EZHSO Series Pressure Reducing Regulators Manual de instrucciones descargar pdf (Pagina 22)

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Types EZH and EZHSO

13. Screw the smart screws (key 68) — already on the

sleeve — to x the diaphragm/plates system on

the sleeve system. See Torque Specication table

for proper torque. Tighten screws (key 68) using a

"star" criss-cross pattern until proper specied torque

is achieved.

14. Lubricate lower casing (key 5) on the diaphragm

contact area.

15. Carefully insert the trim system into the sleeve guide

(key 61).

16. Lubricate the diaphragm (key 20) on the upper casing

contact area.

17. Lubricate and mount the O-ring (key 69) on the cap

(key 70). Lubricate and mount O-rings (key 9) and anti-

friction rings (key 8) inside the cap (key 70). Carefully

place the cap on the actuator upper casing (key 11).

Align the travel indicator hole on the cap (key 70) to the

upper casing travel indicator hole. Screw 8 screws

(key 77) to tighten cap (key 70) to the upper casing

(key 5). Carefully place the top actuator casing on the

top of the lower actuator casing/trim system using a stud

to guide.

Note

Rotate the upper casing such that the outer

holes for sensing lines are perpendicular to

gas ow.

18. Lubricate threads on bolts (key 21).

19. Bolt together the upper and lower actuator casings using

bolts (key 21), washers (key 22), and nuts (key 23).

See Torque Specication table for proper torque. Tighten

screws (key 16) using a "star" criss-cross pattern for

ve times until proper specied torque is achieved.

20. Assemble one nut (key 151) to the stem (key 147) until

achieve specied torque, and then assemble another nut

(key 151) to lock position of stem. Screw on the closing

cap (key 146). Mount O-ring (key 75) on the cap (key 70).

21. If present, set the stem (key 139) through the casing

hole and tap it into the groove in the diaphragm plate

(key 18). Slide the travel indicator tting (key 141) over

the stem and tighten to the cap (key 70).

Type EZH OS2 Regulator with Slam-shut

Maintenance (Figure 20)

1. Unscrew the BMS (safety manometric box) impulse

line connector.

2. Remove cover (key 57) from the mechanism box (BM).

3. Unscrew fastening screw (key 51).

4. Remove holding pin.

5. Remove mechanism box.

6. Unscrew screws (key 50) from the connecting part

(key 48).

7. Remove connecting part (key 48), O-rings (keys 56 and

49) and if necessary the two guide rings (rep. 54).

8. Remove spring (key 55) and valve plug (key 46).

9. Unscrew bypass (key 53) and remove valve O-ring.

10. Removing the seat (key 52) (not recommended) from

the body (key 47) requires a special extraction tool.

Type PRX Pilot Maintenance (Figure 23)

CAUTION

Always remove spring (key 7) tension before

performing maintenance on this unit.

To remove spring tension loosen locknut

(key 2) and backout adjusting screw

(key 1) until compression is removed from

the spring.

Lower Case Maintenance

1. Disconnect pilot and remove it from the line.

2. Remove screws (key 10) from lower cover (key 21) and

the separate lower cover from the body (key 16).

3. Use a wrench to hold the stem (key 23) and break

loose the stem nut (key 20). Remove the stem nut and

washer (key 11).

4. Remove the diaphragm plate (key 13), diaphragm

(key 14), pad holder (key 22) and O-ring (key 18).

Inspect parts for damage or wear, replace if necessary.

5. Remove orice (key 19) and O-ring (key 17). Inspect

the parts for damage or wear, and replace if necessary.

Lightly lubricate the O-ring and place in the body

(key 16). Install the orice.

6. Set the pad holder (key 22) in the body (key 16).

7. Lightly lubricate the rims of the diaphragm (key 14)

and place it on top of the pad holder (key 22). Set the

diaphragm plate (key 13) on the diaphragm (key 14).

8. Lightly lubricate the O-ring (key 18) and place it in the

lower case (key 21).

9. Place the washer (key 11) and stem nut (key 20) on the

stem (key 23) and tighten.

If also performing upper case maintenance, skip to

step 2 of "Upper Case Maintenance" section.

10. Insert screws (key 10) in the lower cover (key 21) and

tighten uniformly to ensure proper seal.

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Emerson EZH and EZHSO Series Pressure Reducing Regulators Manual de instrucciones Pagina 22

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