Robar Industries 7400 Series, 7500 Series, 7800 Series, 7900 Series Installation Instructions Manual

Robar 7400/7500/7800/7900
series Dismantling Joint
Installation Instructions

Dismantling Joint installation guide

Before beginning assembly of your Robar Dismantling Joint
be sure to confirm that you have received the correct size
required and all parts have not been damaged during
transport.

1. Inspect all mating flange surfaces for any damage or irregularities
that may interfere with the flanges ability to form a long term seal.

2. Measure the pipe flange for parallelness. As well confirm that the
drill pattern on the Robar dismantling joint matches the mating
flanges.

3. Measure the gap to determine the distance required and confirm
the dismantling joints capability (max 2”).

4. Make sure that the inserted spool piece is inserted at least 2
inches inside of the flanged coupling body.

5. Loosen the coupling bolts on the end ring to “relax” the gasket

seal and to allow for easy movement of the flanged spigot. Total
disassembly of the dismantling joint is not required for installation
(ties rods must be removed for installation).

6. Move the dismantling joint into position between the mating

flanges.

7. Using flange bolts, fasten the flanged coupling end of the

dismantling joint to one of the mating flanges (flange gasket not
required for 7400 or 7500 series dismantling joint). Depending on
the situation it maybe necessary to insert the tie rods concurrently
with the flange bolts.

8. The Robar 7400/7500 series dismantling joints uses through

bolts which act as a flange bolt and as well as a end ring bolt.

9. Attach the flanged spigot to the opposite mating flange. Fasten

together with flange bolts (not supplied by Robar). Be sure to place
the flange gasket in between the mating flanges prior to inserting
flange bolts (not supplied by Robar).

10. The pipe spool piece should ha ve the same center line as th e

flanged coupling body. If not check to ensure both flanges on the
dismantling joint are flush with t he mating flange ends. At the same
time ensure that the coupling gasket is seated properly into the
flange coupling body; if not properly seat the gasket.

11. Slide follower ring into position and hand tighten the follower

bolts and nuts.

12. Insert supplied tie rods (for restrained applications). Each tie

should have a total of 4 nuts when fully assembled. When inserting
the tie-rod, thread the nuts into position. The tie-rod must pass
through the flanges on each end of the dismantling joint. Make sure
the tie-rod lengths are equal for all rods supplied. Tighten the nuts
that secure the flanges. (**DO NOT TIGHTEN THE FOLLOWER
RING BOLT AND NUTS BEFORE PROPER TORQUE HAS BEEN
APPLIED TO THE FLANGE BOLTING**)

Bolt Size Follower Ring Bolts Flange Bolts

5/8” 70-80 ft-lbs. 70-80 ft-lbs.
3/4” 80-90 ft-lbs. 90-100 ft-lbs.
7/8” 90-100 ft-lbs. 150-160 ft-lbs.

Robar Recommended Torque