Emerson Y690A Bedienerhandbuch PDF herunterladen (Seite 7)

Y690A Series

stem (key 14) or access the stem seal O-ring

(key 30, Types Y690AM and Y690AHM only),

perform Body Area Maintenance procedure

steps 1 and 4. Then pull the stem out of the

lower diaphragm casing (key 4).

7. Install the stem (key 14) into the diaphragm

casing (key 4) and perform Body Area Maintenance

procedure steps 6 through 9 as necessary.

8. Install the lever assembly (key 16) into the stem

(key 14) and secure the lever assembly with the

machine screws (key 17).

9. Install the parts on the pusher post in the order

listed below:

• Pusher Post (key 8)

• Pusher Post Connector (key 40)

• Connector Seal O-Ring (key 49)

• Diaphragm Head (key 7)

• Diaphragm (key 10), pattern side up

• Diaphragm Head (key 7)

• Hex Nut (key 21) — Torque the hex nut 9 to

11 foot-pounds (12 to 15 N•m) to secure

parts to the pusher post connector (key 40)

• Overpressure Spring (key 39)

• Spring Holder (key 37)

• Machine Screw (key 38)

10. Insert and tighten the machine screw (key 38)

with a torque of 1 to 3 foot-pounds (1 to 4 N•m)

to secure the diaphragm parts to the pusher post

(key 8).

11. Install the assembled parts in the diaphragm

casing (key 4). Make sure that the lever

(key 16) ts in the pusher post (key 8) and that

the holes in the diaphragm (key 10) align with the

holes in the diaphragm casing.

12. Install the spring case assembly (key 3) on the

diaphragm casing (key 4) so that the vent

assembly (key 26) is correctly oriented, and

secure with the cap screws (key 24, Figure 7)

and hex nuts (key 23, not shown) ngertight only.

13. Insert the control spring (key 6) into the spring

case (key 3), followed by the adjusting screw

(key 35).

14. Turn the adjusting screw (key 35) clockwise

until there is enough spring (key 6) force to

provide proper slack to the diaphragm (key 10).

Using a crisscross pattern, nish tightening the

cap screws (key 24) and hex nuts (key 23) from 14

to 17 foot-pounds (19 to 23 N•m) of torque. To

adjust the outlet pressure, refer to the Startup and

Adjustment section.

15. Install a replacement closing cap gasket (key 25)

if necessary, and then install the closing cap

(key 22).

To Convert Constructions

The Type Y690A to the Type Y690AM:

New parts required: keys 30, 31, and 33

1. Remove pipe plug (key 27, Figure 5) from the

diaphragm casing (key 4).

2. Refer to steps 1 and 5 in the Body Area

Maintenance section to remove the four pitot tube

screws (key 33) and pitot tube (key 32, Figure 5).

3. Insert the throat seal O-ring (key 31, Figure 6) and

one machine screw (key 33).

4. Insert the stem seal O-ring (key 30, Figure 6) by

following steps 1 through 6 of “To Disassemble

and Reassemble Diaphragm Parts” in the

Diaphragm and Spring Case Area

Maintenance Section.

The Type Y690AM to the Type Y690A:

New parts required: keys 27, 32, and 33

1. Insert pipe plug (key 27, Figure 5) in the diaphragm

casing (key 4).

2. Follow steps 1 through 6 of “To Disassemble and

Reassemble Diaphragm Parts” in the Diaphragm

and Spring Case Area Maintenance Section to

remove one machine screw (key 33, Figure 6),

the stem seal O-ring (key 30, Figure 6), and the

throat seal O-ring (key 31, Figure 6) blocking the

registration port.

3. Insert pitot tube (key 32) and four pitot tube

screws (key 33) as outlined in step 5 of the Body

Area Maintenance section.

Parts Ordering

When corresponding with tyour local Sales Ofce

about this regulator, include the type number and all

other pertinent information stamped on the nameplate.

Specify the eleven-character part number when

ordering new parts from the following parts list.

1 2 3 4 5 6 7 8 9 10 11 12

Y690A Series 1

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