INSTALLATION INSTRUCTIONS FOR MODEL HRW
REFRACTORY WELL AND TYPE HNP NOZZLE INSULATION

For 2" S80 (49 mm) Up through 4" S160 (87 mm) Nozzle Size

Download the Model HFS Detailed Application Note 
Note: You will need the Acrobat Reader to view the data sheet. 

CUTAWAY SHOWING HRW WELL AND HNP INSULATION INSTALLED WITH HTP T/C IN PLACE

PROCEDURE FOR SMALL SIZE NOZZLE: (PERFORM STEPS IN ORDER SHOWN BELOW)

1. Put the HRW refractory well in place. The bottom of its collar must rest against the bottom of the recessed hole in the top face of the refractory. The top of the collar must be just below the inside of the reactor shell. It MUST NOT be higher than the inside of the shell. For example, excess mortar or refractory in the nozzle or a too shallow recess could raise the well higher and keep it from being in the correct position. If, the final position is too high, then the HTP element protective well will hit the inside bottom of the refractory well as the HTP is being installed. This will probably break one, or both, wells. Breakage of either will cause the HTP thermocouple to fail when the reactor begins operating. Drill the recess deeper; chip out or otherwise remove refractory or other obstructions before installing the refractory well. Take a tape measure or scale (no more than 0.5”(13mm) wide); measure from the inside bottom of the HRW to the top face of the mounting flange. This distance should be 0.5” to 1.0”(13 to 25mm) more than the HTP thermocouple insertion distance. “Insertion distance” is the distance from the face of the HTP mounting flange to the tip of the element protective wall. If it is not within these parameters; do not proceed; determine what the problem is and correct it:
   

   THE HRW REFRACTORY WELL MUST BE IN THE CORRECT POSITION!

2. Stack all of the woven “D” discs on top of the collar. There should be 5 or more pieces of this type disc.
3. Stack the pressed “C” discs on top of the woven “D” discs. The top of these discs should be 0.50” to 1.25” (13 to 32mm) above the face of the nozzle flange (the actual distance is equal to 0.15”(4mm) X the number of woven discs. A spare “d” disc is provided, install if needed, otherwise discard.
4. Place a flat plate, such as a piece of flat board lumber on top of the discs. The plate must be wider than the I.D. of the nozzle. Press down evenly on the plate. A force of 15-35 pounds (6-11 Kg) should compress the insulation enough so that the flat surface is against the face of the nozzle flange.
5. IF IT DOES NOT FIT
   • Verify that the installed insulation kit is for the nozzle that you are putting it in. The last number in the Model Number (on the outside of the plastic bag) indicates the intended nozzle height, in inches. E.g. M/N HPN-49mm-90mm indicates that it is for a 65mm, 250kg/cm 2 flanged nozzle (I.D. =49mm (1.93”)) which is 90mm (3.54”) high.
   • If your nozzle is not the height indicated by the model number, secure the correct kit. The HTP insertion dimension may also be wrong; please verify.
   • If your nozzle size and height is the same as marked on the kit; then repeat steps (1) through (5).
   • If it still does not fit, consult Delta Technical Document #TS-HNP which covers the HNP kit.
   • If no solution is found, and it still does not fit, contact Delta's Shreveport Engineering Department for assistance.
6. WHEN IT DOES FIT: You are ready to install the HTP Thermocouple assembly. Refer to the HTP instruction manual for guidance. It is still possible to break the ceramic well(s), which will cause the thermocouple to fail soon after startup of the reactor! PLEASE BE CAREFUL!

Please read the HTP instructions and follow them! You can and will get good results! Please do not “GUESS” as to how it is supposed to be done! The HTP can be broken and/or have its life shortened!

Go to Model HTP Thermocouple Page

Go to Delta Controls Home Page

Go to Delta Controls Literature Page

Go to Delta Controls Technical Website

<00-hrw06>