Romac Industries DJ400 Installation Manual

INSTALLATION INSTRUCTIONS

ROMAC
INDUSTRIES,
INC.

Read installation instructions rst before installing. Check parts to ensure that no damage has occurred during transit and that no parts

are missing. Also check the diameter of the pipe and the size marked on the Dismantling Joint to ensure you have the proper size.

Style DJ400 3"-12" Dismantling Joints

Step 1 Check the DJ400 parts to ensure no damage oc-

curred during transit and that no parts are missing.

Step 2 Check the mating anges to insure that it matches

the drilling of the DJ400. They must be parallel and aligned
axially.

Step 3 Remove the tie-rods from the DJ400 and loosen

the end ring bolts to allow the spool piece to move freely within
the Flange Coupling body.

Step 4 Move the DJ400 into position between the mat-

ing anges. Sizes 3" - 12" have an o-ring gasket on the
anged coupling body end. Using ange bolts, fasten the
anged coupling end of the dismantling joint to one of the
mating anges. Depending on the situation, the tie-rods
might need to be inserted concurrently with the ange bolts.

4

SPOOL

NOTE: Sizes 4", 6", 8" and 12" use through-bolts, which act
as end-ring bolts on one end, and ange bolts on the other
end.

3" sizes combine through bolts and tie-rods.

10" sizes use a cross bolt.

FLANGE

BOLTS

END RING

FLANGE

COUPLING BODY

Step 6 The pipe spool piece should be concentric with

the anged coupling after bolting the anges. If the anged
coupling was completely disassembled, make sure the beveled
edge of the gasket matches the beveled end of the anged
coupling. Slide end ring into position and hand tighten the
end ring bolts.

6

Step 7 Insert tie-rods. (NOTE: Without the tie-rods in

place, the tting is NOT RESTRAINED.) Each tie-rod will have
a total of 4 nuts when assembled. While inserting the tie-rod,
thread the nuts into position. The tie-rod must pass through
the anges on each end of the dismantling joint. Make sure
the tie-rod lengths are equal. Tighten the nuts that secure the
anges BEFORE torquing the nuts on the end ring to complete
the installation.

Step 5 Attach the anged spool to the opposite mating

ange in your system. Insert the ange gasket between the
ange faces (not provided). Fasten together with ange
bolts. Make sure the spool piece is inserted at least 2
inches inside of the Flange Coupling body.

5

Document #30-9-0012 4/27/2014

21919 20th Avenue SE • Suite 100 • Bothell, WA 98021 • Phone [phone] • 1-800-426-9341 • Fax [phone]

7

ROMAC
INDUSTRIES,
INC.

INSTALLATION INSTRUCTIONS

RECOMMENDED TORQUE

Style DJ400 3"-12" Dismantling Joints (continued from front)

Step 8 Evenly tighten the bolts around the end ring by

diametrically alternating opposite positions at appproximately
25 ft-lb increments until the recommended torque is achieved.
Wait ten minutes and then retorque.

DJ400 SIZE END RING BOLTS FLANGE BOLTS

3 60 - 70 FT-LBS 75 - 85 FT-LBS

4 60 - 70 FT-LBS 75 - 85 FT-LBS

6 75 - 85 FT-LBS 90 - 100 FT-LBS

8 75 - 85 FT-LBS 90 - 100 FT-LBS

10 60 - 70 FT-LBS 150 - 160 FT-LBS

12 85 - 95 FT-LBS 150 - 160 FT-LBS

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PRECAUTIONS

1. Check anges to make sure you are using the correct size DJ400; also check the length of DJ400
to make sure it will t in the space allocated.

2. Make sure no foreign materials lodge between gasket and spool.

3. Avoid loose tting wrenches, or wrenches too short to achieve proper torque.

4. Keep threads free of foreign material to allow proper tightening.

5. Take extra care to follow proper bolt tightening procedures and torque recommendations. Bolts
are often not tightened enough when a torque wrench is not used.

6. Pressure test for leaks before backlling.

7. Backll and compact carefully around pipe and ttings.

8. When reinstalling parts with stainless steel hardware, there may be a loss in pressure holding
ability due to worn or damaged threads during the original installation.

COMMON INSTALLATION PROBLEMS

1. Bolts are not tightened to the proper torque.

2. Rocks or debris between spool and gasket.

3. Dirt on threads of bolts or nuts.

4. Not enough pipe insertion.

5. Incorrect mating ange.

21919 20th Avenue SE • Suite 100 • Bothell, WA 98021 • Phone [phone] • 1-800-426-9341 • Fax [phone]