Emerson T205B Bedienerhandbuch PDF herunterladen (Seite 8)

Type T205B

8

2. Turn the adjusting screw (key 35) counterclockwise

to remove all the compression from the control

spring (key 6).

3. If the only maintenance procedure to be performed

is the changing of the control spring (key 6):

For internal  at circular adjusting screw

a. Remove the adjusting screw (key 35).

b. Take out the control spring and replace with

the desired spring.

c. Reinstall the adjusting screw.

d. Adjust the outlet pressure to the desired

control pressure setting, refer to steps 2 and

3 of Adjustment section.

e. Change the stamped spring range on

the nameplate. Skip to step 16.

For external square head adjusting screw

a. Remove the adjusting screw (key 35) and

locknut (key 20).

b. Remove the closing cap (key 22), closing

cap gasket (key 25) and upper spring seat

(key 19).

c. Take out the control spring and replace with

the desired spring.

d. Reinstall the upper spring seat, closing cap

gasket, closing cap, locknut and

adjusting screw.

e. Adjust the outlet pressure to the desired

control pressure setting, refer to steps 2 and

3 of Adjustment section.

f. Change the stamped spring range on

the nameplate. Skip to step 16.

4. If the further maintenance to the internal

diaphragm casing (key 4) parts is required,

remove the hex nuts (key 23) and spring case cap

screws (key 24). Remove the diaphragm (key 10)

plus attached parts by tilting them 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 head cap

screw (key 38) from the pusher post. If the only

maintenance procedure to be performed is the

replacement of the diaphragm components, skip to

step 11.

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

the machine screws (key 17). If the only future

maintenance procedure to be performed is the

replacement of the lever assembly, skip to step 10.

6. Remove the guide insert (key 18) and stem

(key 14) assembly carefully from the lower

casing (key 4). Remove the cotter pin (key 15),

bias spring seat (key 40) and bias spring

(key 39) then pull the stem out of the guide

insert. Apply a moderate coating of lubricant to

the stem, install the stem seal O-ring (key 30)

and the two back-up rings (key 37) onto the

valve stem.

7. Remove the cotter pin (key 15) to replace the

disk assembly (key 13).

8. Install the disk assembly (key 13) to stem

(key 14) and secure with cotter pin (key 15).

Insert the stem into guide insert (key 18), put

on bias spring (key 39) and bias spring seat

(key 40), secure with another cotter pin. Use

plier or equivalent tool to bend the cotter pin

ends after insertion (see Figure 5).

9. Install the stem (key 14) and guide insert

(key 18) assembly into the lower casing (key 4)

and perform Body Area Maintenance procedure

steps 4 through 5 as necessary.

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

(key 14) and secure the lever assembly with the

machine screws (key 17) using 14 to

19 inch-pounds / 1.6 to 2.1 N•m of torque.

11. Always use a new diaphragm head gasket

(key 45). Install the parts on the pusher post

(key 8) in the following order:

• Diaphragm head gasket

• Diaphragm head (key 7)

• Diaphragm (key 10)

• Diaphragm head

• Lower spring seat (key 50)

• Washer (key 36)

Secure the parts with diaphragm head cap

screw (key 38) using 60 to 72 inch-pounds /

6.8 to 8.1 N•m of torque.

Figure 5. Proper Bending of Cotter Pin

COTTER PIN (KEY 15)

COTTER PIN (KEY 15)

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

Type T205B 1

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