Fisher EUT-2 Instruction Manual page 13

Instruction Manual
August 2010
SEAL RING FOR
EUT-2 AND EWT-2 VALVES
B2425 / IL
For all sizes, tack weld the seat ring to the cage
using minimal heat. Two welds, 6 mm (1/4-inch) long
and 180 degrees apart, are required. Install the seat
ring seal ring (key 6) so that its open side faces the
valve stem for Cavitrol III trim and flow-down
standard cages. Reverse the seal ring for Whisper
PISTON RINGS FOR
EUD AND EWD VALVES
Figure 6. Seal Ring and Piston Ring Details
Trim III, WhisperFlo, and flow-up standard cages.
Lubricate the seal ring with a general-purpose,
lithium-base lubricant, and place it over the bottom
end of the seat ring. Start the ring in the groove on
one side of the seat ring, and gently work it over the
seat ring.
EU and EW Series Valves
2
27
29
28
FLOW UP
21B2120-A
PEEK ANTI-EXTRUSION RINGS
A6137 / IL
SEAL RING FOR
EUT AND EWT VALVES
2
27
29
28
FLOW DOWN
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