Emerson Fisher D & DA Manual de instrucciones descargar pdf (Pagina 7)

Instruction Manual

D100386X012

DandDAValves

June 2014

Figure 3. Packing Arrangements

C0755-1

9.5 mm

(3/8 INCH)

STEM

12.7 mm

(1/2 INCH)

STEM

19.1 mm

(3/4 INCH)

STEM

9.5mm(3/8INCH)STEM

12.7 mm (1/2 INCH) STEM

8. Install a new bonnet gasket (key 7), making sure the gasket seating surfaces are clean and smooth. Carefully install

the valve plug/stem assembly into the valve body. Then slide the bonnet over the stem and thread it tightly into the

valve body, per t he torque values in table 4.

9. Install new packing and the metal packing box parts according to the correct arrangement in figure 3. Place a

smooth-edged pipe over the valve stem, and gently tap each soft packing part into the packing box.

Table 4. Torque for Body-to-Bonnet Joint

VALVE SIZE

RECOMMENDED TORQUE

NSm

LbfSft

NPS 1 1060 780

NPS 2 - Up to 6000 psi valve rating 2030 1500

NPS 2 - 9000

(1)

and 10,000 psi valve rating 2710 2000

1. 9000 psi valve rating is available for DA only.

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

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Emerson Fisher D & DA Manual de instrucciones Pagina 7