Emerson Y690VB Manual de Instruções descarregar pdf (Página 4)

Y690VB Series

Warning

To avoid personal injury, property

damage, or equipment damage caused

by sudden release of pressure or

explosion of accumulated gas, do not

attempt any maintenance or disassembly

without rst isolating the regulator from

system pressure and relieving all internal

pressure from the equipment.

Body Area

These procedures are for gaining access to the disk

assembly, orice, and body O-ring. All pressure must

be released from the diaphragm case before the

following steps can be performed.

Key numbers are referenced in Figures 3 and 4.

1. To inspect and replace the disk assembly (key 13)

or orice (key 5), remove the cap screws

(key 2), and separate the diaphragm casing

(key 4) from the body (key 1).

2. Remove and inspect the body seal O-ring (key 11)

and the backup ring (key 50).

3. Inspect and replace the orice (key 5) if

necessary. Lubricate the threads of the

replacement orice with a good grade of light

grease and tighten using 29 to 37 foot-pounds

(39 to 50 N•m) of torque.

4. Remove the cotter pin (key 15) if it is necessary

to replace the disk holder assembly (key 13).

For a Type Y690VBM, also inspect the throat

seal O-ring (key 31) by removing the machine

screw (key 33). Replace if necessary. To install

a throat seal, place the O-ring on the machine

screw and thread into guide insert (key 18) to seal.

Note

The disk holder assembly (key 13) is

comprised of the disk and disk holder.

5. Install the disk holder assembly (key 13) and

secure it to the valve stem (key 14) with the cotter

pin (key 15).

6. Install the backup ring (key 48) and body seal O-ring

(key 11) into the body (key 1).

7. Replace the diaphragm casing (key 4) on the body

(key 1) and secure with the cap screws (key 2).

Diaphragm and Spring Case Area

These procedures are for gaining access to the

control spring, diaphragm assembly, valve stem, and

stem O-ring. All pressure must be released from the

diaphragm case before these steps can be performed.

Type Y690VB

Key numbers are referenced in Figure 3.

1. Remove the closing cap (key 22) and turn the

adjusting nut (key 20) counterclockwise until all

compression is removed from the control spring

(key 6). If the only further maintenance is to change

the control spring (key 6), skip to step 11.

2. Remove the spring case cap screws (key 24) and

hex nuts (key 23, not shown) and lift off the spring

case assembly (key 3).

3. Remove the diaphragm (key 10) and attached

parts by tilting it so that the pusher post (key 8)

slips off the lever assembly (key 16). To separate

the diaphragm from the attached parts, unscrew

the diaphragm hex nut (key 21). If the only further

maintenance is to replace the diaphragm parts, skip

to step 8.

4. To replace the lever assembly (key 16), remove

the machine screws (key 17) .

5. To replace the valve stem (key 14) also perform body

area maintenance procedure steps 1 through 4 and

pull the valve stem (key 14) out of the guide insert

(key 18).

6. Install the valve stem (key 14) into the guide

insert (key 18) and perform body area

maintenance procedure steps 5 through 7.

7. Install the lever assembly (key 16) into the valve

stem (key 14) and secure the lever assembly

(key 16) with the machine screws (key 17).

8. Reassemble the diaphragm assembly in the

following order:

Pusher post (key 8)

Diaphragm head gasket (key 45)

Diaphragm head (key 7)

Diaphragm (key 10)

Diaphragm head (key 7)

Washer (key 36)

Diaphragm nut (key 38)

Secure with 5 to 6 foot-pounds (7 to 8 N•m) of torque.

9. Install the pusher post (key 8) plus attached

diaphragm parts onto the lever assembly (key 16).

1 2 3 4 5 6 7 8

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