Flowserve CV10 - Manual (Page 5)

2. The nuts B
may be unscrewed in any
sequence you like.
5
Maintenance
Danger
When loosening the socket-head cap screw V
hold lever extension Q tight so that it cannot
be knocked downwards by the spring force.
Dismantling of spring and
operating lever
(Fig. 2)
1. Open the valve.
2. Loosen socket-head cap screw V while
holding lever extension Q .
3. Move operating lever anticlockwise until the
lever extension hits the body dog A
1
. If the
lever cannot be operated, loosen it by
delivering slight hammer blows to angle
lever
R .
The tank-container bottom valve does not
require any special maintenance.
Important Note
Check the CV 10 when inspecting the tank
container, at least on the occasion of the
“Inspection and Examination” that takes place
every 2½ years. If necessary, service or
replace components.
1. Check torque applied to nuts and bolts and,
if required, re-tighten.
Torque [Nm]
Fixing nut B 36 + 2
Hexagon-head cap bolt J 7.5 + 0.5
Socket-head cap bolt V 32 ± 1
Socket head cap bolt T 32 + 2
2. Check fixing of the operating lever and, if
necessary, replace pin W .
3. Check spring U and its support for damage
and smooth operation.
When the interior of the TC is examined
check the following:
1. Check support of valve disc H . The latter
must have sufficient play. If required clean
support and replace locking clip
X .
2. Check gasket Y for damage and
deformation. Replace gasket at least every
2½ years.
4. Remove spring first from reel S on the
operating lever and then from reel on the
body.
5. Completely unscrew socket-head cap screw
V and pull lever out of the stem cone.
Do not exchange the operating lever R when
installing several valves type CV 10.
Fitting of spring and operating lever
(Fig. 2)
1. Close CV 10 valve via valve disc H or
hexagon and keep it closed.
2. Insert operating lever into stem cone and fix
it with socket-head cap screw V so that it
can still be turned in the cone (loose fit).
Make sure that the cone and lever are free
of oil and grease.
3. Move operating lever anticlockwise until the
lever extension Q hits the body dog A
1
.
4. Engage spring U first in reel S of
operating lever then in reel S located at the
body dog A
1
.
5. Move operating lever clockwise upwards
until the markings on stem and angle lever
coincide (see Fig. 4).
6. Tighten socket-head cap screw V with a
torque of 32 ± 2Nm.
Note
Danger
First dismantle spring U , as otherwise due to
the spring tension there is the risk of damage
and personal injury.
Replacement of spring supports
(reels)
(Fig. 2)
1. Dismantle the spring U .
2. Unscrew the socket-head cap screws T .
3. Apply a light smear of lubricant to shaft and
threads of the new socket-head cap screws.
4. Push new reels S onto the screws T .
5. Introduce screws into angle lever R and
body dog A
1
and tighten with a torque of
32 + 2 Nm.
6. Re-install spring U .