Leslie Controls D Series - Manual (Page 8)

CFTIIP-015
Rev.0
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reproduced in one form or another.
Page 8 of 15
6.4 Reassembling the Body
To reassemble the valve body, refer to Figure
2 then proceed as follows:
1. Install new bonnet (2) and seat gaskets (5)
with the bevelled edge up
NOTE: All gaskets should be replaced
whenever the valve is disassembled.
2. Relocate the seat ring (17). Carefully
install the cage (18), taking care to ensure
they installed with the correct ends up.
3. Replace the plug seals (16) on the plug,
referring to Figure 3 and observing the
following directions:
WARNING: Gloves should be worn to
protect the hands from being burned.
PTFE Seals: Heat the seal to 300°F (150°C)
and slip it over the plug into the seal groove.
Thermal expansion causes the ring to stretch,
thereby making it relatively easy to slide
over the plug head. Care must be taken to
prevent the seal from rolling, rather than
sliding over the plug.
Figure 3: Installation of Carbon filled
Teflon energised seal ring
FTC
FTO
By hand, evenly exert a sufficient thrust to
constrain seal ring to slide until its groove.
Take care not to damage seal ring during this
step. Ensure seal ring is completely and
correctly inserted before perform next
assembly step.
NOTE: To easy introducing plug with its
seal ring into the cage, it is recommended to
apply a small amount of grease such as
Bardhal® (or equivalent) around the seal ring
(17).
Figure 4: Installation of Grafoil seal
ring