4 … 10
M/CD • Karl Dungs Inc.
• FRI Gas Pr
essur
e R
egulator • Edition 2015.02 • P/N 261 400
Mounting & Installation
Recommended Procedure to Mount Flanges
1. Make sure the o-rings and the grooves are clean and in
good condition.
2. Install the FRI/6 with the gas flow matching the direction
indicated by the arrows on the casting.
3. Mount the FRI/6 vertical upright to horizontal.
4. Clean the mounting surface of the flanges. Make sure they
are in good condition.
5. Attach the FRI/6 to the flanges using the appropriate M6
or M8 socket cap screws supplied.
• The regulator can be mounted either upstream or down-
stream of the DMV. It can also be mounted as a stand alone
regulator using two flanges and the flange mounting kit.
• The main gas supply must be shut off before starting the
installation.
• Examine the regulator for shipping damage.
• The inside of the regulator and piping must be clean and
free of dirt.
Recommended Procedure to Mount the FRI/6 regulator
to a DMV 701, 702, or 703 series safety shutoff valve.
1. Replace the o-ring in the groove on the side of the DMV
body with the oval o-ring supplied with the mounting kit.
2. Make sure the oval o-ring and the groove are clean and
in good condition.
3. Install the FRI/6 regulator and DMV series valve with the
gas flow matching the direction indicated by the arrows
on the body.
4. Attach the regulator to the DMV series valve body using the
socket cap crews supplied in the FRI/DMV mounting kit.
5. Use a 5mm Allen wrench for the FRI 705/6 & 707/6.
6. Use a 6mm Allen wrench for the FRI 710/6 & 712/6.
7. Tighten the screws in crisscross pattern.
8. Do not overtighten the screws. Follow the maximum torque
values listed below.
9. After installation is complete, perform a leak test to verify
that no leakage occurs.
Recommended Piping Procedure & Applying Pressure
• Use new, properly reamed and threaded pipe free of chips.
• Apply good quality pipe sealant, putting a moderate amount
on the male threads only. If pipe sealant lodges on the
regulator seat, it will prevent proper operation. If using LP
gas, use pipe sealant rated for use with LP gas.
• Do not thread pipe too far. Valve distortion and/or malfunc-
tion may result from excess pipe in the valve body.
• Apply counter pressure using a parallel jaw wrench only
to the flats on the flange when screwing the pipe into the
flanges.
• Do not overtighten the pipe. Follow the maximum torque
values listed below.
• After installation is complete and pressure is applied, per-
form a leak test.
6. Use a 5 mm Allen wrench for the FRI 705/6 & 707/6.
7. For the FRI 710/6 & 712/6, there two options for bolts:
For 1” and 1 1/4” flanges, the M8 x 35 mm bolts must
be used.
For 1 1/2” and 2” flanges, the M8 x 40 mm bolts must
be used.
8. Tighten the screws in a crisscross pattern.
9. Do not overtighten the screws. Follow the maximum torque
values below.
10. After installation is complete, perform a leak test.
If the flow is not in the same direction of the
arrows the regulator will not operate properly.
Recommended Torque for Piping
1/2”
3/4”
1”
11/4” 11/2”
2”
NPT
pipe
375
560
750
875
940
1190 [Ib-in]
Recommended Torque for Mounting Screws
M6
M8
Screw Size
62
134
[Ib-in]
Recommended Torque Screws
M6
M8
Screw Size
62
134
[Ib-in]
When first applying pressure, open the inlet
manual shutoff valve slowly. Quickly opening
the inlet manual shutoff valve can permanently rup-
ture the internal, balancing diaphragm.
