Samson EB 20b, Монтаж и эксплуатация

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3-9
EB 20b_EN
February 2022 edition
Subject to technical changes
Design and principle of operation
3.5.4.2 Final assembly of the ball valve
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Place the second body half onto the previously described
body half, so that it centres itself on the ball stem and the
V-ring packing as well as the seal ring.
Make sure that the V-ring packing is not squashed at the side by
the body halves.
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Fasten the body halves together with screws (10), washers
(12) and nuts (11) so they are hand-tight.
− Depending on the nominal size, stud bolts with nuts or screws
can be used.
− The fi nal screw connection of the body halves is performed dur-
ing a subsequent assembly step.
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Clamp the ball valve in a vice for further assembly with the
base body
fl ange (1).
Damage to the fl ange due to improper handling!
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Do not damage the housing fl ange, especially the sealing
surfaces.
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Place the spring washer(s) (16) on the bushing (15). The lo-
cation and quantity of the spring washer(s) can be found on
the drawing, see Figure 3-3.
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Place the centring ring (18) on the spring washer(s) (16).
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Insert the set of spring washers (8) in the centring ring until
reaching the bottom ring of the V-ring packing. The arrange-
ment and quantity of the spring washers can be found on the
drawing, see Figure 3-3.
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Insert the bearing bushing (7) into the stuf fi ng box fl ange (6).
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Place the pre-assembled stuf fi ng box fl ange on the body and
adjust with screws (9).
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Tighten the screws evenly in a criss-cross pattern until a gap
between 1 - 2 mm has formed between the stuf
fi ng box
fl ange and the body.
The fi nal screw connection of the stuf fi ng box is performed dur-
ing a subsequent assembly step
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NOTE
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Tighten the screws (10) and nuts (11) on the body halves (1
and 2).
For the tightening sequence and tightening torques of the respec-
tive nominal sizes, see Figure 15.1 and Table 15.1 in Chapter
“15.1.1 Tightening torques”.
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To complete the assembly, tighten the screws (9) on the stuff-
ing box (6) evenly and in a criss-cross pattern.
Prior to the leak test, actuate the valve a few times so that the ball
can centre on the seal rings and provide an optimal seal.
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