Troubleshooting - Emerson FISHER EZH Series Instruction Manual

Pressure reducing regulators

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Instruction manual (20 pages)

Table of Contents

Types EZH and EZHSO

Type SA/2 Pilot Supply Filter Regulator

Maintenance (Figure 26)

1. Disconnect pilot supply filter 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 filter cover (key 11).

4. Clean nets (key 8). Replace filter 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 filter 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 filter pad (key 12) and nets (key 8), one on

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

13. Pick up the body (key 7) and place it on the filter 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.