Jordan Valve Mark ED & ET Series Globe Style Control Valve (1-6) User Manual

Page 3

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Reassembly Continued,

8a.

For valve bodies using a carbon-filled TFE

piston ring, locate the split and slightly spread

the ring. Install the ring over the stem

and onto the piston ring groove on the

valve plug. Graphite piston rings

are supplied as a complete ring

and must be broken into

two sections. The piston ring can be

broken in half by scoring, and then breaking

over a hard surface such as the edge of a

table. Ensure the broken ends

are re-matched when the piston

ring is installed in the piston ring groove.

8b.

Apply a lubricant to both back-up ring and seal

rings. Install the back-up ring over the stem and

into the piston ring groove. Place the

seal ring over the top edge of the valve plug, so

that it slips into the groove on

one side of the valve plug.

Cautiously

stretch the seal ring to work it over the top

edge of the valve plug. Avoid jerking sharply on the seal,

as the TFE in the seal ring needs time to cold flow during

the stretching procedure. This stretching may make the

seal ring seem loose in the groove; however it will con-

tract to its original size after installation of the cage.

9.

When placing the valve plug into the cage, en-

sure that the seal ring is evenly set in the

entrance bevel at the top of the cage to avoid

ring damage.

10.

Mount bonnet to the body.

11.

Tighten the bonnet to body bolts. Refer to Table

2 for recommended torques.

Always adhere to accepted bolting practices and lubri-

cate bolts. Correct tightening of the bonnet bolts accom-

plishes the following:

a)

The spiral wound gasket will compress

enough to load and seal the seat ring

gasket.

b)

The outer portion of the top gasket will

compress so that the bonnet to

body connection forms a seal.

Note: Bolt up characteristics for spiral wound gas-
kets are such that the tightening of one bolt may
loosen another. This will occur with the tightening of
all the bolts until the bonnet to body seal is made.
Several trials on each bolt are required until, at the
given torque, the nut does not turn.

12.

Mount the actuator to the bonnet and make up

the stem connection. Refer to “Making up Stem

Connection” instructions in this manual.

Valve Stem

Connection (VSC)

Torque

Min/Max Values

Groove Pin

Drill Size

Inches

Mm

Lbf-Ft

N-m

Inches

3/8

9.5

40-47

25-35

3/32

1/2

12.7

81-115

60-85

1/8

3/4

19.1

237-339 175-250

3/16

1

25.4

420-481 310-355

1/4

1-1/4

31.8

827-908 610-670

1/4

Table 1: Stem Torque and Groove Pin Drill Sizes

Valve Size Inches

Bolt Torques

SA 193-B7

Lbf-Ft

N-m

1-1/4 or less

95

133

1-1/2, 1-1/2x1m, 2, 2x1

71

100

2-1/2, 2-1/2x1-1/2

95

133

3, 3x2, 3x2-1/2

125

175

4, 4x2-1/2, 4x3

200

280

6

405

567

Table 2: Body to Bonnet Bolt Torques

M

ark

ED

anD

ET S

EriES

1-6

inch

G

lobE

S

TylE

c

onTrol

V

alVES

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