Romac Industries 511 Installation Manual

INSTALLATION INSTRUCTIONS

ROMAC
INDUSTRIES,
INC.

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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 range marked on the coupling to ensure you have the proper size.

Style 511 Coupling

Step 1 • Check the coupling parts to insure that no damage

has occurred during transit and that no parts are missing.

Step 2 • Clean pipe ends for a distance of 2" greater than

length of the coupling when centered over the joint.

Step 3 • Check area where gaskets will seat to make sure

there are no dents, projections, gouges, etc., that will interfere
with the gasket seal. Welds must be ground ush.

Step 4 • Place a reference mark on pipe an equal dis-

tance from each pipe end for centering coupling over the
pipe ends.

Step 5 • Place one end ring on each pipe end.

Step 8 • Slide center ring

onto one of the
pipes.

Step 9 • Bring

the other pipe end
into position. Main­tain recommended
gap between pipe ends (
4" long center rings,

1

/4" - 1/2" for ve inch long center ring and

1

/2" - 3/4" for 7" long center rings).

1

/4" for

Step 10 • The center ring should be centered such that

the space between the OD of the pipe and the ID of the center
ring is even all around the pipe. Slide gaskets into position
with the beveled edge engaging the ared end of the center
ring.

Step 11 • Slide the end rings into position against

the gaskets. Check
coupling for proper
positioning over
pipe ends using ref­erence marks. (See
Step 4)

Step 6 • Lubricate the gaskets and pipe surface with a

suitable gasket lubricant.

Step 7 • Place one gasket next to each end ring with

beveled edge toward the pipe end.

Document #20-9-511-0006 05/05/03

Note: Flexible Couplings do not provide protection against
possible pullout of pipe ends in unrestrained conditions.

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

Step 12 • Insert

bolts into end rings and
tighten. Bolt tightening should be done evenly, alternating
to diametrically opposite positions at approximately 20 ft-lbs
increments to bring bolts to recommended tightness.

Nom. Pipe Diameter Torque

1

/2" - 8" 35-45 ft-lbs.

10" and 12" 50-60 ft-lbs.

Note:

45 ft-lbs. torque = 12" wrench w/45 lbs. force
60 ft-lbs. torque = 12" wrench w/60 lbs. force

Step 13 • After pipe is pressurized, check for leakage

and tighten as necessary.

ROMAC
INDUSTRIES,
INC.

INSTALLATION INSTRUCTIONS

Style 511 Coupling

PRECAUTIONS

1. Check diameter of pipe to make sure you are using the correct size coupling; also check gasket to
make sure it is the size you think it is.

2. Clean pipe to remove dirt and corrosion from pipe surface. Lubrication and additional cleaning
should be provided by brushing both the gasket and plain pipe end with soapy water or approved
pipe lubricant per ANSI/AWWA C111/A21.11.

3. Make sure no foreign materials lodge between gasket and pipe.

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

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

6. 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.

7. Pressure test for leaks before backlling.

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

9. 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 pipe and gasket.

3. Dirt on threads of bolts or nuts.

4. Pipe not inserted into the coupling far enough.

5. Center ring not centered evenly around pipe.

6. Too much pipe deection.

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