6
SEMPELL HIGH PRESSURE FORGED GLOBE VALVES
INSTALLATION AND MAINTENANCE INSTRUCTIONS
Disassembly
1. For a correct disassembly it is necessary to
follow in reverse the assembly instructions.
2. Follow this special remark to disassemble
the seat ring: in the upper part of the body,
in the area of the segment ring, there are
some holes to drive out two parts of the
segment ring by using a pin and a hammer.
1. Wired pure graphite.
2. 3 to 4 pure graphite rings with a density
of 1.8 g/cm
3
.
3. Wired pure graphite.
4. Ground ring.
FIGURE 2
FIGURE 3
Cautions
First, drive out the two parts of the segment
ring as indicated in Figure 3, then the
remaining two parts.
Recommended spare parts
Please refer to Figure 4
• Gasket (7)
• Yoke nut (21)
• Ground ring (13)
• Bearings (22)
• Packing (14)
• Stem (20)
• Globe plug (28) with the plug nut (30)
7. The bonnet must be brought into position
with the necessary bolts and nuts. For the
necessary torque, see Table 2.
8. Install the ground ring (13), the packing of
pure graphite and two rings to the stuffing
room (see Figure 2). The operator MUST
wear gloves.
9. The packing shall be compressed by the
gland (15) and the gland flange (16) with the
cut ring (19) inside. Screw the nuts to the
bolts with the torque indicated in Table 1.
10. Install the indicator (25) on the stem.
11. Assemble the yokenut (21), the two bearings
(22) and the two O-rings (32) to the yoke
with the lubrication nipple, then the gear/
actuator connection flange with the bolts.
12. Assemble the handwheel, the gear or the
actuator to the valve.
IMPORTANT
The segment ring has to be fixed by the safety
ring. Ensure that the segment ring is in the
correct position.
Segment
ring
Segment
ring
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