Samson 3321, Mounting And Operating Instructions

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38 EB 8111/8112 EN
Servicing
7.1 Replacing the gasket
7.1.1 For mounting using
crossbeam and central
nut (Form B)
1. Undo the body nuts (14) gradually in a
criss-cross pattern.
2. Lift the flange (97), flange bonnet (96),
and plug with plug stem (5) off the body
(1).
3. Remove the flat gasket (17). Carefully
clean the sealing faces in the valve body
(1) and on the flange bonnet (96).
4. Insert a new gasket (17) into the body.
5. Place the flange bonnet (96) and the
flange (97) over the studs (13) onto the
body.
6. Press the plug (5) firmly into the seat (4),
while fastening down the flange bonnet
(96) with the body nuts (14). Tighten the
nuts gradually in a criss-cross pattern.
Observe tightening torques.
7. Mount actuator. See associated actuator
documentation.
1 Body
4
Seat
5 Plug (with plug stem)
8
Threaded bushing
(packing nut)
13 Stud bolt
14 Body nut
15 Packing
17 Body gasket
96 Flange bonnet
97 Flange
98 Central nut
A11 Rod
A17 Bracket
A25
Nut
A11
8
4
1
15
14
17
5
98
97
96
13
A17
A25
Fig. 9: Type 3321 Valve, DN 15 to 50/NPS ½ to 2; Form B attachment (mounting using a central
nut)