Emerson 92W Manual de Instruções descarregar pdf (Página 6)

Type 92W

1. Unscrew the plug guide (key 2). Remove the screen

(key 77), plug (key 4), plug spring (key 3), and stem

(key 7). Unscrew the seat ring (key 5). Examine the

seat ring and plug seating surfaces for damage.

2. Clean and replace parts as necessary. Apply Led-Plate

Number 250

(1)

sealant or equivalent to the seat ring

threads. Thread the seat ring into place and tighten it

to between 19 and 25 foot-pounds (26 and 34 N•m)

of torque.

3. Handle the parts carefully, and place the plug spring

(key 3) in the plug guide (key 2). Slide the plug (key 4)

over the spring and into the plug guide. Place the

screen (key 77) onto the plug guide. Place the stem

(key 7) in the center hole of the plug guide. Apply

Led-Plate Number 250 sealant or equivalent to the plug

guide threads, and screw the guide plus attached parts

into the body (key 1).

4. Remove the pipe plug and bleed restriction (keys 74 and

76). Clean or replace the restriction as necessary.

5. Sparingly apply Led-Plate Number 250 sealant or

equivalent to the threads of the restriction, and thread

the restriction into place.

6. Apply Led-Plate Number 250 sealant or equivalent to the

threads of the pipe plug. Thread the pipe plug into place

and tighten it to between 5 and 15 foot-pounds (7,0 and

20 N•m) of torque.

7. Remove the cap screws (key 17), spring case (key 14),

control spring (key 12), and upper spring seat (key 13)

from the body.

8. Remove the lower spring seat (key 11, Type 6492H

pilot only) or diaphragm assembly (key 24, Type 6492L

pilot only), diaphragms (key 10), and diaphragm gasket

(key 18) from the body. Inspect and clean the

diaphragm gasket, and replace it if necessary.

9. Unscrew the bellows retainer (key 8) and remove the

bellows (key 9). Replace worn parts as necessary, and

install the bellows and bellows retainer. Tighten the

bellows retainer to between 19 and 25 foot-pounds (26

and 34 N•m).

10. Install the diaphragm gasket. Install both diaphragms

with their raised preformed centers facing toward the

spring case.

11. Lubricate the upper spring seat and the exposed

threads of the adjusting screw with Never-Seez

(2)

lubricant or equivalent. Install the lower spring seat

(key 11, Type 6492H pilot only) or diaphragm assembly

(key 24, Type 6492L pilot only), control spring

(key 12), upper spring seat (key 13), and spring case

(key 14). Insert and tighten the cap screws (key 17)

to between 12 and 18 foot-pounds (16,0 and

24,00 N•m) of torque, using a crisscross bolting pattern.

12. When pilot maintenance is complete, refer to the

startup and adjustment procedure to put the regulator

back in operation and adjust the pressure setting.

Type 92W Main Valve

Perform these procedures if replacing the piston(s),

cylinder(s), stem(s), seals, valve plug, or seat ring. All

key numbers are referenced in Figure 5 except where

otherwise indicated. Instructions are given for complete

disassembly and assembly. Disassemble the main

valve only as far as necessary to complete the required

maintenance. Then, begin the assembly procedure at the

appropriate step. .

Note

The regulator may remain in the pipeline

during maintenance procedures unless the

main valve body is replaced or removed

for repairs. .

Whenever a gasket seal is disturbed by

removing or shifting gasketed parts, a

new gasket should be installed upon

reassembly. This is necessary to ensure a

good gasket seal. .

Disassembly

1. Disconnect all tubing and remove the pilot from the

main valve. .

2. Remove the cap screws (key 3, not shown) from a cast

iron body, or stud nuts (key 4) from a steel body, and lift

off the body ange.

3. For the NPS 1, 1-1/2, and 2 sizes (DN 25, 40, and 50),

remove the top cylinder (key 17), and pull out the top

piston with attached stem and other parts. Remove

the hex nut (key 41), lock washer (key 40), top ring

retainer (key 26), and top piston ring (key 25) from the

top piston (key 24).

4. For the NPS 1, 1-1/2, and 2 sizes (DN 25, 40, and 50),

lift off the cylinder spacer (key 21), and remove the

stem seal retainer (key 23) and stem seal (key 22) from

the spacer.

5. Remove the cylinder (key 17), piston (key 24) with

attached parts, and spiral wound gasket (key 8).

6. Remove the cotter pin (key 16, NPS 1, 1-1/2, and 2

sizes only) (DN 25, 40, and 50), stem nut (key 15),

bottom stem (key 9) with hex head, valve plug (key 6),

piston ring retainer (key 26), piston ring (key 25), bottom

piston ring retainer (key 26, NPS 1, 1-1/2, and 2

sizes only) (DN 25, 40, and 50), piston (key 24), spring

(key 12), piston spacer (key 11), cage (key 5), and seat

ring (key 7).

1. Trademark of Armite Laboratories.

2. Trademark of Never-Seez Corp.

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

Type 92W Liquid Regulator 1
Type 92W 10

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Emerson 92W Manual de Instruções Página 6

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