Samson 3241-7 - Page 2

Contents Page
1 Design and principle of operation. . . . . . . . . . . . . . . . . . . . 4
2 Assembling valve and actuator . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Assembly and adjustment . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Pretensioning springs in actuator version “Actuator stem extends”. . . . . 7
2.3 Valve and actuator with different rated travels . . . . . . . . . . . . . . 8
3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 Mounting position. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Signal pressure line . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.3 Strainer, bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.4 Test connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 Maintenance – Replacing parts . . . . . . . . . . . . . . . . . . . . . 10
5.1 Standard valve version. . . . . . . . . . . . . . . . . . . . . . . . . 11
5.1.1 Stuffing box packing. . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.1.2 Seat and/or plug . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.2 Valve with extension bonnet or metal bellows seal . . . . . . . . . . . 13
5.2.1 Stuffing box packing. . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.2.2 Plug. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.2.3 Seat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2.4 Metal bellows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2.5 Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.3 Replacing the collar or seal . . . . . . . . . . . . . . . . . . . . . . 16
6 Material identification . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.1 Identification marks . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.2 Seat code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7 Description of nameplates . . . . . . . . . . . . . . . . . . . . . . . 20
8 Customer inquiries . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2 EB 8015 EN
Contents
Note! Non-electrical control valves which do not have a valve body lined with an insulating
material coating do not have their own potential ignition source according to the risk assess-
ment in the rare incident of an operating fault, corresponding to EN 13463-1: 2001 para-
graph 5.2, and therefore do not fall within the scope of the European Directive 94/9/EC.
Refer to paragraph 6.3 of EN 60079-14:1977 VDE 0165 Part 1 concerning connection to
equipotential bonding system.
These Mounting and Operating Instructions apply also to Type 3246 Globe Valve
(Class 150 and 300) in conjunction with Data Sheet T 8046-1 EN.