Emerson SR8 Manual de Instruções descarregar pdf (Página 7)

Type SR8

Figure 5. Type SR8 Sanitary Backpressure Regulator Assembly with Pressure Loaded Spring Case

1/2 through 1-1/2-Inch Sizes (DN 15 through 40)

VIEW B

METAL DIAPHRAGM OPTION

(key 7), and plug O-ring (key 3) can now be removed

from the plug (key 2). An optional lower diaphragm

plate (key 10) and O-ring (key 4) are included for the

constructions offering protection against

vacuum conditions.

5. Replace any damaged parts. Refer to the

section titled Soft Seat Maintenance when the seat

needs to be replaced.

6. Reassemble in the reverse order of the above

procedure. The order is listed below or refer to Figure 3.

a.) Plug (key 2)

b.) Plug O-ring (key 3)

c.) Diaphragm plate (key 10) (vacuum protection

construction only)

d.) Diaphragm plate O-ring (key 4) (vacuum

protection construction only)

e.) Diaphragm gasket (key 6) (Metal diaphragms only)

f.) Diaphragm (key 7)

g.) Diaphragm gasket (key 6) (Metal diaphragms only)

h.) Guide ring assembly (keys 9 and 5)

i.) Lower spring seat (key 8)

j.) Flat Washer (key 23)

k.) Lock Washer (key 24)

l.) Hex Nut (key 16)

7. Hold wrench ats on plug (key 2), then torque hex

nut (key 16) to 6 to 8 in•lbs (0,7 to 0,9 N•m) for the

1/2 and 3/4-inch (DN 15 and 20), 5 to 7 ft-lbs (7 to 9

N•m) for the 1 and 1-1/2 inch (DN 25 and 40) and 28

to 30 ft-lbs (38 to 41 N•m) for 2 and 3-inch (DN 50 and

80). After tightening the hex nut, apply Loctite 290 or

equivalent to the nut/thread interface.

8. Position diaphragm assembly in body (key 1).

Replace regulator spring (keys 12 and 13, when

applicable) and upper spring seat (key 11). Replace

the spring case (key 14) and sanitary clamp (key 15).

Torque clamp nuts to 20 to 22 ft•lbs (27 to 30 N•m) for

the 1/2 through 1-1/2-inch (DN 15 through 40) and 38

to 40 ft•lbs (52 to 54 N•m) for the 2 and 3-inch (DN 50

and 80).

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

Type SR8 1

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Emerson SR8 Manual de Instruções Página 7

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