Samson EB 14b, Монтаж и эксплуатация

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3-6
EB 14b_EN
January 2022 edition
Subject to technical changes
Design and principle of operation
3.5.2.2 Assembling butter fl y valves up to
DN | 300 (NPS10)
Ö
Insert the seal ring (4) into the body.
It is essential to pay attention to cleanliness during assembly.
Ö
Insert the o-ring (24) into the fastening ring (5).
Ö
Place the preassembled fastening ring (5) on the seal ring (4)
and press it in with a press.
Ö
Loosen the bonnet (7).
Ö
Push the tension spring (19) into the slot.
Ö
Fasten the bonnet as previously described.
3.5.2.3 Assembling butter fl y valves from
DN | 400 (NPS16)
Ö
Insert the seal ring (4) into the body.
It is essential to pay attention to cleanliness during assembly.
Ö
Place the fastening ring (5) on the seal ring (4) and adjust
with the screws (26).
Ö
Tighten the screws evenly in a criss-cross pattern.
3.5.3 Assembly of butter fl y valves BR | 14c
(BR | 74b) with spring washer preloaded
V-ring packing (type WTD and MTD)
3.5.3.1 Preassembly of the butter fl y valves
Ö
Place the valve body (1) on a clean surface at working height
so that the bearing area of the shaft is easy to reach.
Ö
Push the bearing bushing (12a) as far as it will go into the
bearing bore in the valve body.
Ö
Insert the spacer (22) into the bearing bore.
Fit butter fl y valves with a nominal size of DN 300 or NPS12
without a spacer (22).
Ö
Insert the valve disc (3) into the body such that the bearing
bores in the disc align with the bearing bore in the body.
Ö
Insert the switching shaft (2) through the bearing bores of the
body and the disc.
Ö
Push the bearing bushing (12b) over the shaft as far as it will
go into the bearing bore in the body.
Ö
Insert the spacer (21).
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Ö
Drill dowel holes for connecting the switching shaft (2) and
the valve disc (3).
Ö
Pin the disc and shaft with close-tolerance grooved pins (14).
Fit butter fl y valves with a nominal size of DN 100 or NPS4 with-
out a spacer (21).
Ö
Screw the stud bolts (16) into the body.
Ö
Insert the mating washer (18) into the provided recess in the
bonnet (7).
Ö
The bonnet sealing (23) is also pushed onto the bonnet in the
same way as the body sealing (13).
Fit butter fl y valves with a nominal size of DN 300 or NPS12
without body sealing (23).
Ö
Insert the preassembled bonnet into the bearing bore in the
valve body (1) and adjust with the stud bolts.
Ö
Tighten the bonnet (7) with the nuts (17) evenly and in a
criss-cross pattern.
Ö
Push the thrust washer (8) over the free shaft end into position
in the valve body.
Ö
Push the PTFE V-ring packing (9) over the shaft into the body
bore and press in with an assembly sleeve. Refer to the sec-
tional drawing Figure 3-4 for the arrangement of the V-ring
packing.
Ö
Place the intermediate fl ange (25) on the body and adjust
with screws (30).
Ö
Tighten the screws (30) evenly in a criss-cross pattern.
Ö
Push the thrust piece (15) over the switching valve and press
it into position in the body.
Ö
Insert the set of spring washers (10). Refer to the sectional
drawing Figure 3-4 for the arrangement of the spring wash-
ers.
Ö
Press the bearing bushing (11) into the stuf fi ng box (6).
Ö
Fit the preassembled stuf fi ng box smoothly over the interme-
diate fl ange and adjust with screws (20).
Ö
Tighten the screws (20) evenly in a criss-cross pattern.
Ö
Adjust the dihedron of the switching shaft (2) parallel to the
valve disc and secure it against further twisting.
Press the switching shaft up against the mating washer (18).
Ö
Drill dowel holes for connecting the switching shaft (2) and
the valve disc.
Ö
Pin the disc and shaft with pastel pins (14).
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