Samson 3251-E, Mounting And Operating Instructions

Page: 74 / 102

9-16 EB 8052-E EN
Servicing and conversion
13. Insert the plug/piston (5) together with
the plug/piston stem (5.1) vertically into
the valve body (1) and position it in the
seat (4) in the closed position.
Version with V-port plug: align the plug
(5), making sure that the largest
V-shaped port of the V-port plug faces
toward the valve outlet. See information
under 'Mounting the actuator onto the
valve' in the 'Installation' section.
14. Insert a new spiral gasket (17) onto the
valve body (1).
15. Place the valve bonnet (2) over the plug
or piston stem (5.1) onto the body (1).
16. Firmly press the plug or piston (5) into
the seat (4), while fastening down the
valve bonnet (2) with the body nuts (14).
Tighten the body nuts (14) gradually in a
crisscross pattern. Observe tightening
torques.
17. Carefully slide the packing parts over the
plug or piston stem (5.1) into the packing
chamber using a suitable tool. Make sure
to observe the proper order (see
Fig. 9-6).
18. Insert packing follower (8).
19. Place yoke (60) on the valve bonnet (2)
and fasten using the castellated nut (92).
20. Place packing gland (162) over the studs
(164) on the valve body (2) onto the
packing follower (8).
21. Screw the two spring loading assemblies
(163) onto the studs (164) and guide
them through the holes on the packing
gland.
22. Adjust the packing (see information un-
der 'Adjusting the packing' in the 'Instal-
lation' section > 'Testing the installed
valve' > 'Leak test').
23. Loosely thread lock nut (10) and stem
connector nut (9) onto the plug or piston
stem (5.1).
Valve version with anti-rotation fixture
1. Undo the body nuts (14) gradually in a
crisscross pattern.
2. Ensure that the clamps (301) are still fas-
tened tight to the plug or piston stem
(5.1).
3. Lift the valve bonnet (2) including yoke
(60), plug/piston (5) and plug/piston
stem (5.1) upwards off the body (1) and
set it aside.
4. Undo the screws (303) and remove the
clamps (301) of the anti-rotation fixture.
Set aside clamps (301), screws (303),
washers (304) and stem (9).
5. Continue as described in steps 5 to 22 of
the previously described procedure
‘Valve version without anti-rotation fix-
ture’ under b) on page 9-15.
6. Apply a thin film of lubricant (114) to the
screws (303).
Impaired functioning due to incorrectly
applied lubricant.
Î
Do not apply any lubricant to the threads
of the clamps (301), stem (9) or plug/
piston stem.
NOTICE
!