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