Pfeiffer 14c Series, Maintenance Manual

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Pfeiffer Chemie-Armaturenbau GmbH • Telefon: 02152 2005-0 • Telefax: 02152 1580 • E-Mail: vertrieb@pfeiffer-armaturen.com • Internet: www.pfeiffer-armaturen.com
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Fig. 5 - Exploded view of the Butterfl y Valve Series 14b with adjustable stuffi ng box fl ange
Item Description Material
1 Valve body 1.4408
2 Valve shaft 1.4542
3 Valve disc 1.4408
4 Sealing ring PTFE with glass
5 Fastening ring 1.4571
6 Adjustable stuffi ng box fl ange 1.4571
7 Bonnet 1.4571
8 Washer 1.4571
9 Braided packing PTFE
11 Bushing PTFE with carbon
12 Bushing PTFE/glass or metallic
13 Body seal PTFE
14 Grooved pin 1.4542
16 Stud bolt A2-70
17 Nut A2-70
18 Lower disc PTFE
19 Tension spring 1.4310
20 Screw A2-70
21 Bushing 1.4571
22 Spacer bushing 1.4571
23 Bonnet seal PTFE with glass
24 O-ring Viton
26 Screw A2-70
27 Screw A2-70
28 Thrust washer 1.4571
Table 2 - List of parts
4.3.2.1 Assembling Butterfl y Valves in sizes DN 250 ( 10” )
and smaller
Insert the sealing ring ( 4 ) into the body.
Note:
On doing so, make sure that all parts are clean.
Place the O-ring ( 24 ) in the fastening ring ( 5 ).
Place the previously assembled fastening ring onto the sealing ring
and press it in using a hydraulic press.
Loosen the bonnet ( 7 ) again and push the tension spring
( 19 ) into the oblong hole/slot.
Fasten the bonnet as previously described.
4.3.2.2 Assembling butterfl y valves in sizes DN 300 ( 12” )
and
larger
Insert the sealing ring ( 4 ) into the body.
Note:
On doing so, make sure that all parts are clean.
Place the fastening ring onto the sealing ring and position correctly
using the screws ( 27 ).
Tighten the screws evenly in a crisscross pattern.
4.3.3 Notice of attaching actuating elements
Note: Double-eccentric butterfl y control valves must al-
ways close with a clockwise rotation of the valve shaft!