WEKA_IOM_C-0068_TgxV_DN250_PN6_EN / 17.04.2020
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Replacing the guide rings and o-ring / back-up ring in the upper part
Change upper guide ring and/or lower guide ring
Loosen all screws using an allen wrench, 8mm. Guide ring can be removed.
Clean surfaces of the upper part. There may be small abrasions. Grease the surface of the new guide rings
with Gleitmo 599. WEKA AG recommends changing also the o-ring and back-up rings.
New guide rings can be mounted. Grease all screws with Gleitmo 599.
Tighten all screws again with an allen wrench, 8mm. Torque 32 Nm.
Change O-Ring and Back-up ring
The instructions must be followed until the upper guide ring can be removed.
After that, the o-ring and back-up ring can be replaced.
Back-up rings are blue marked
Replacing the seal of the orifice hole
For the required tools, please see chapter 6.6.2 Disassembly of a TgxV DN250/PN6 valve.
First, the orifice hole must be opened, then the plug seal must be removed. Finally, some
new PTFE band muss be added around the plug. Mount plug again.
Replacing the Gasket on the guard connection
To replace the gasket on the guard connection, the Swagelok fitting must be
removed with an open-end spanner SW14.
Remove the gasket. Using a plastic tool (avoiding damage at the seat surface)
the new gasket can be replaced.
Lower guide ring
Upper guide ring
O-Ring and
Back-up ring
To replace the desired parts,
first, the actuator needs to be
disassembled, then, the
instructions in chapter 6.6.2
Disassembly of a TgxV
DN250/PN6 valve must be
followed until the upper part
can be removed.
