Delta Controls HTP Installation, Operation And Maintenance Manual page 10

3.
Place the two soft compressible collar rings from the HNP
Nozzle Insulation Kit, having an I.D. of 2.75" (70 mm),
around the refractory well collar. They should fill the gap
between the outside of the refractory well collar and the
inside of the vessel nozzle.
Collar Rings
5.
Place enough of the rigid pressed 1-1/2" (38 mm) thick rings
into the nozzle so that the top half of the top ring extends
above the flange. If needed, remove or insert additional
lower soft rings to obtain this fit.
Rigid, Pressed
Rings
4
. Place approximately 8 – 10 each of the soft compressible
nozzle rings, with the ¾" (19 mm) center hole, in the bottom of
the nozzle. Insure that the center holes are in alignment.
Compressible
Nozzle Rings
Collar Rings
6
. Place and center the flange gasket on the vessel nozzle flange.
Gasket
Page 10