
Tri Lok
®
Cryogenic Valve
Installation, Operation and Maintenance Manual
TRI LOK
®
CRYOGENIC TRIPLE OFFSET VALVE
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7 Install the new seat gasket (B2), place this seat/gasket
sub-assembly into the valve body paying attention that
the groove of the seat is aligned with the body groove
and insert the seat alignment button (B8)
8 Replace set screws if necessary
9 Adjust the seat retaining ring lower dowels (B6) until
they are flush with the bottom of the seat retaining ring
(B4) Install the seat retaining ring (B4) in its groove in
the body
10 Using a cross bolting technique, tighten the seat retainer
lower set screws (B5) to 50% of torque specified in
Table 5 (Pg 16) Once all set screws are tightened to the
same torque, proceed to fully tighten them to 100% of
the listed torque value
11 Assemble the seat retaining ring upper dowels (B7) and
using a cross bolting technique, tighten them according
to the torque specified in Table 5 (Pg 16)
12 Rotate the disc (C1) to its previous position to facilitate
installation of the seal ring (C2) Place a new disc seal
gasket (C3) into the groove on the disc face (C1) Be
sure that the new seal ring (C2) is assembled with the
seal ring collar (C8) and kept together with the seal ring
collar pin (C9) Place the seal ring and collar onto the
disc making sure the collar groove is aligned with the
seal ring alignment pin (C7) Place the seal ring retainer
(C4) over the seal ring Apply PTFE Thread Lubricant to
the seal ring retainer cap screws (C5) All of the cap
screws (C5) need to be fully threaded into the disc (C1),
but remain only finger-tight at this time
10.4.2 Seal ring replacement with the seat
removed from the valve
This procedure follows the instructions for replacement
of the seat (B1) described above If the old seat (B1) is to
be reused, exercise extra care when extracting it from the
retaining cavity in the valve body (A1) When using jacking
bolts to extract the seat, avoid forcing the jack screws
unevenly which could result in permanent deformation
of the seat (B1) If the old seat (B1) is to be reused, make
absolutely certain that the seat (B1) slides out of the
retaining cavity easily; in a balanced and level manner
10.5 Bottom Plate Gasket Replacement
Refer to parts diagram (Pg 7, 9)
1 If the valve is installed, remove line pressure
2 Completely remove the bottom plate screws (G3)
Remove the bottom plate (G1) and the bottom plate
gasket (G2)
3 Clean the bearing area of residual gasket and foreign
materials
4 Place the new gasket (G2) on the bottom plate (G1)
and install it onto the body
5 Reinstall the bottom plate screws (G3) and using a
cross bolting technique, tighten them according to the
torque specified in Table 3 (Pg 15)