Type MR105
7
Table 5. Wide-Open Flow and IEC Sizing Coefcient
LINEAR CAGE
Body Size
Line Size Equals Body Size
C
1
K
m
F
L
X
T
F
d
NPS DN C
g
C
V
1 25 463 13.7 34.0 0.81 0.90 0.73 0.36
2 50 761 22.5 33.8 0.75 0.87 0.72 0.24
3 80 997 30.5 32.7 0.78 0.88 0.68 0.22
4 100 934 27.5 34.0 0.77 0.88 0.75 0.18
QUICK OPENING CAGE
Body Size
Line Size Equals Body Size
C
1
K
m
F
L
X
T
F
d
NPS DN C
g
C
V
1 25 597 17.5 34.1 0.81 0.90 0.73 0.43
2 50 1740 48.2 36.1 0.81 0.90 0.82 0.34
3 80 3540 103.1 34.4 0.76 0.87 0.75 0.32
4 100 4300 135.9 31.6 0.72 0.85 0.65 0.30
REDUCED PORT QUICK OPENING CAGE
Body Size
Line Size Equals Body Size
C
1
K
m
F
L
X
T
F
d
NPS DN C
g
C
V
2 50 1570 43.8 35.9 0.81 0.90 0.72 0.36
Installation Location
The installed regulator should be adequately
protected from vehicular trafc and damage from
other external sources.
Install the regulator with the vent pointed
If the vent
cannot be installed in a vertically down position,
the regulator must be installed under a separate
protective cover. Installing the regulator with the vent
down allows condensation to drain, minimizes the
entry of water or other debris through the vent and
minimizes vent blockage from freezing precipitation.
Do not install the Type MR105 in a location
where there can be excessive water
accumulation or ice formation, such as directly
beneath a downspout, gutter or roof line of a
building. Even a protective hood may not provide
adequate protection in these instances.
Install the regulator so that any gas discharge
through the vent or vent assembly is over 3 ft / 0.9 m
away from any building opening.
Periodically check all vent openings to be sure that
they are not plugged.
CAUTION
To protect against precipitation, make
certain that the vents are oriented
such that the opening does not allow
precipitation to enter vents.
Regulators Subjected to Heavy
Snow Conditions
Some installations, such as in areas with heavy
snowfall, may require a hood or enclosure to protect the
regulator from snow load and vent freeze over.
Table 4. Maximum Differential Pressure
ACTUATOR TYPE
MAXIMUM DIFFERENTIAL PRESSURE
Gas Service (Linear Cage) Liquid Service (Quick Opening Cage)
NPS DN psid bar d psid bar d
Low Pressure
1 25
400 or maximum
inlet pressure,
whichever is lower
27.6 or maximum
inlet pressure,
whichever is lower
200 13.6
2 50 200 13.6
3 80 225 15.5
4 100 225 15.5
High Pressure
1 25
400 or maximum
inlet pressure,
whichever is lower
27.6 or maximum
inlet pressure,
whichever is lower
250 17.2
2 50 200 13.6
3 80 225 15.5
4 100 250 17.2
(20 Seiten)
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