ALFA LAVAL UNIQUE SSV Y-BODY VALVE INSTRUCTION MANUAL—REV 3/19
5 Maintenance
Study the instructions carefully. The items refer to the parts list and service kits section. Handle scrap correctly.
NC = Normally closed.
NO = Normally open.
A/A = Air/air activated.
5.2 Dismantling of valve
S
Stteepp 11
1. Supply compressed air to the actuator (only NC).
2. Loosen and remove upper clamp.
3. Release compressed air (only NC).
4. Lift away the actuator.
5. Remove body gasket.
6. Unscrew and remove valve plug.
7. Loosen and remove upper clamp.
8. Remove O-ring, lip seal and bushing in bonnet.
(Use bushing tool and rubber mallet. See drawing).
P
Paayy ssppeecciiaall aatttteennttiioonn ttoo tthhee w
waarrnniinnggss!!
TD 461-771
N
Noottee!! For plug seal replacement please see section 5.3.
TD 461-772
N
Noottee!!
Be careful not to damage the
bushing.
5.3 Plug Seal replacement
TTR
R22 sseeaall rriinngg rreeppllaacceem
meenntt
1. Place the plug element on a firm support.
2. Using a utility knife, partially AND CAREFULLY cut through
the upper ring portion of the TR2 plug avoiding contact
with stainless steel stem.
3. Force apart both cut ends of the plug for removal from
stem.
4. TR2 plugs are installed by applying uniform pressure on
all sides.
(Pressure can be applied by using the seat assembly tool).
5. Using a piece of metal an a rubber mallet, place a precise
tab to make the TR2 plug snap on to the stem. Reverse
the tool and tab again to secure proper fit.
6. Examine seat assembly to be sure the TR2 plug is properly
mounted, holding the seat assembly in one hand - rotate
the TR2 plug.
(For proper CIP cleaning the TR2 plug should turn freely
on the stem.)
For more explicit instructions, please refer to the maintenance
video.
20
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