2 … 10
M/CD • Karl Dungs Inc.
• FRI Gas Pr
essur
e R
egulator • Edition 2015.02 • P/N 261 400
Specification
Max. Operating Pressure (MOP)
7 PSI (500 mbar) UL & CE
5 PSI (350 mbar) CSA
Max. Body Pressure (MOP)
15 PSI (1bar)
Ambient / Fluid Temperature
• +5 °F to +150 °F for up to 7 PSI for
regulating behavior (≈ -15...65°C)
(+/- 10 % of setpoint)
• -40 °F to +150 °F
• CSA Certified for -40°F to +150 °F
up to 5 PSI: Diaphragms are suit-
able for the low temperature, but
there may be out of range regulat-
ing behavior.
• -15 °C to +70 °C applies to the CE
Marking.
Gases
Dry, natural gas, propane, butane;
other noncorrosive gases. Suitable
for up to 0.1% by volume, dry H
2
S.
A “dry” gas has a dew point lower
than +15 °F and its relative humidity
is less than 60 %.
Materials in contact with Gas
Housing: Aluminum
Sealings on valve seats: NBR-based
rubber
°F
0
-40
+150
FRI/6 Gas pressure regulator (lock-up type) with integrated gas filter in one housing. The FRI/6 series regulator mounts
directly to the DMV 701, 702 and 703 series valves. Suitable as stand-alone when using two flanges.
Gas
Maximum pressure drop and gas
velocity
The maximum pressure drop is lit-
mited by the celocity of the gas. Do not
exceed a gas velocity of 30 meters/s.
Strainer
23 Mesh, installed in the housing
Filter
Mesh <0.05 mm, installed in the
housing
Hysteresis and Droop
Hysteresis/repeatability is less than
10 % for up to 7 PSI inlet. Average
droop at 20:1 turndown is 10 % for
up to 7 PSI
Lock-Up Rating
• The FRI meets the ANSI Z21.80/
CSA 6.22 as Class I, which allows
lockup rating not more than 150 %
or 5 in. W.C., whichever is greater.
• The FRI meets EN 88-1 as SG30,
which allows lock-up as high as +
30 % of the outlet pressure.
• See lock-up Pressure Parameter
on page 2 for more details
Body Size
Size
FRI 705/6 & 707/6
1/2“ - 1“ NPT
FRI 710/6 & 712/6
1“ - 2“ NPT
[PSI]
Vent Limiting Device and Vent Line
Connection
The FRI/6 has an internal, factory
installed vent limiter, which limits
the escape of gas to less than 0.5
CFH @ 5 PSI in case atmospheric
diaphragm ruptures. Vent limiting
device also complies with EN 88-1 &
ISO 2355-1. Venting required unless
otherwise accepted by the authority
having jurisdiction.
