Emerson EZH and EZHSO Series Pressure Reducing Regulators Manuál s instrukcemi stáhnout pdf (Strana 23)

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Types EZH and EZHSO

Upper Case Maintenance

1. Disconnect pilot and remove it from the line.

2. Loosen locknut (key 2) and backout adjusting screw

(key 1) until compression is removed from the spring.

Remove cap (key 3).

3. Lift the spring carrier (key 6) the spring (key 7) and

O-ring (key 4) out of the upper cover (key 8). Inspect

the O-ring and replace if necessary.

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

separate lower cover from the body (key 16), unless

removed during lower diaphragm maintenance. Use a

wrench to hold stem (key 19) securely while removing

the stem nut (key 26).

5. Remove remaining loose components: washer, upper

diaphragm plate, diaphragm, lower diaphragm plate

and O-rings (keys 11, 13, 14, 15, 18, and 25). Inspect

diaphragm and O-rings for damage or wear, and replace

if necessary.

6. Lightly lubricate the O-ring (key 25). Place the O-ring

over the stem (key 19) and press it down into the body

(key 16).

7. Set the lower diaphragm plate (key 15) into the body

(key 16).

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

and place it in the body (key 16) on top of the lower

diaphragm plate (key 15).

9. Set the upper diaphragm plate (key 13) on top of the

diaphragm (key 14).

10. Place washer (key 11) and stem nut (key 26) on the stem

(key 23) and tighten using a wrench to hold the stem.

11. Set the spring carrier (key 6).

Damper and Restrictor Maintenance

1. Remove the screw (key 31) and plate (key 29).

2. Remove bolts (key 30).

3. Remove the damper adjusting screw (key 27). Remove

and inspect O-ring (key 28) for damage or wear, and

replace if necessary. Lightly lubricate O-ring before

placing on the adjusting screw. Insert damper adjusting

screw into the body (key 16) and tighten. Insert ring nut

(key 30) and tighten. Back out damper adjusting screw

until it stops.

4. Remove restrictor adjusting screw with hole (key 32).

Remove and inspect O-ring (key 28) for damage

or wear, and replace if necessary. Lightly lubricate

O-ring before placing on the adjusting screw. Insert

restrictor adjusting screw into the body (key 16)

and completely tighten. Insert ring nut (key 30) and

completely tighten. Back out restrictor adjusting screw

1/2 turn.

Note

When using a Type PRX/120 pilot with

a Type PRX/125 pilot as monitor, follow

these steps:

• Restrictor: completely tighten and then

back out three full turns,

• Damper: back out until it stops.

5. Install plate (key 29) and screw (key 31).

Type SA/2 Pilot Supply Filter Regulator

Maintenance (Figure 24)

1. Disconnect pilot supply lter regulator and remove it

from the line.

2. Remove bolts, washers, and nuts (keys 2, 9, and 10)

from the body (key 7), then separate upper and lower

covers (keys 19 and 11) from the body (key 7). When

separating the covers from the body, be aware of loose

components: (keys 1, 3, 4, 8, 12, 18, 20, and 21).

3. Remove and inspect O-ring (key 13) for damage or

wear, and replace if necessary. Lightly lubricate the

O-ring before placing it back in the lter cover (key 11).

4. Clean nets (key 8). Replace lter pad (key 12).

5. Inspect diaphragm (key 18) for damage or wear, and

replace if necessary. Check the seating surface of the

screw unit (key 17) for erosion, scratches, spurs, or

other damage, and replace if necessary.

6. Unscrew and remove the regulator seat (key 5). Inspect

the O-ring (key 6) for damage or wear, and replace if

necessary. Lightly lubricate the O-ring and place it on

the regulator seat.

7. Pull pad holder unit (key 15) out of the body (key 7).

Inspect the seat for damage, replace if necessary.

8. Set the lter net (key 8) on the spring (key 14) and insert

the regulator seat (key 5). Tighten the regulator seat

until it stops.

9. Lightly lubricate the outer and inner rims of the

diaphragm (key 18). Place the diaphragm assembly

on top of the regulator seat (key 5). The screw unit

(key 17) will slide into the regulator seat (key 5). Take

care to avoid damage to parts when reassembling.

10. Set the spring (key 1, version Type EZH spring

diameter 3, on top of the nut (key 21).

11. Align the regulator cover (key 19) over the body (key 7),

with the sense port (V) opposite the pilot supply port (R).

12. Place the lter pad (key 12) and nets (key 8), one on

each side of the lter pad, on the lter cover (key 11).

13. Pick up the body (key 7) and place it on the lter cover

(key 11), with the inlet port (M) aligned vertically with the

sense port (V).

14. Insert bolts (key 2). Place washers (key 9) and nuts

(key 10) on the end of the bolts. Tighten the nuts.

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 35 36

Types EZH and EZHSO 1
LABELLING 5

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