Norgren R38 Datasheet
See Section ALE-24 for Accessories
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ALE-7-4
Littleton, CO USA Phone 303-794-2611 www.norgren.com
R38
● Compact instrument units with high performance
● Stable regulation with temperature compensation
● Excellent flow and regulation characteristics
● Panel Mounting facility
Instrument Regulator
Aluminum Model 1/4" Port Size
ISO Symbol
Port Size Substitute
1/4” PTF 2
Material Substitute
Aluminum, nitrile elastomers 0
Aluminum, Viton elastomers 1
Mounting Option Substitute
Without 0
With bracket and nut 1
With panel nut only 2
With handwheel and nut 3
With handwheel, bracket and nut 4
With handwheel only 5
Threads Substitute
PTF A
ISO Rc taper B
ISO G parallel D
API.LP.INT K
Outlet Pressure Adjustment Ranges* Substitute
0.6 to 30 psig (0.04 to 2 bar) C
1 to 60 psig (0.07 to 4 bar) F
3.6 to 100 psig (0.25 to 7 bar) K
Gauges Substitute
Without N
8
3R
★ ★ ★ ★ ★ ★
★
Diaphragm Substitute
Relieving R
Non relieving N
Ordering Information. Models listed are relieving type with 0.6 to 30 psig (0.04 to 2 bar) outlet pressure adjustment range *,
and PTF threads.A gauge is not included.
Port Size Model Number Flow†scfm (dm3/s) Weight lbs (kg)
1/4" PTF R38-200-RNCA 17 (8) 1.06 (0.48)
† Typical flow with 100 psig (7 bar) inlet pressure, 15 psig (1 bar) set pressure and 1 psig (0.05 bar) droop from set.
* Outlet pressure can be adjusted to pressures in excess of, and less than, those specified.Do not use these units to control pressures outside of
the specified ranges.
ALE-7-5
All Dimensions in Inches (mm)
R38 Aluminum Instrument Regulator
Littleton, CO USA Phone 303-794-2611 www.norgren.com
Technical Data
Fluid: Compressed air
Maximum pressure: 290 psig (20 bar)
Operating temperature: -40° to 175°F (-40° to 80°C) *
* Air supply must be dry enough to avoid ice formation at temperatures below 35°F (2°C).
Typical flow at 100 psig (7 bar) inlet pressure, 15 psig (1 bar) set pressure and a
droop of 1 psig (0.07 bar) from set: 17 scfm (8 dm3/s)
Typical relief differential at 30 psig (2 bar) outlet pressure:
2.3 psig (0.16 bar)
Maximum bleed flow at 30 psig (2 bar) outlet pressure (relieving types only):
0.003 scfm (1.5 cm
3
/s)†
† Maximum bleed rate occurs under dead-end (noflow) conditions.
Gauge ports:
1/4 NPT
Materials
Body: Aluminum
Bonnet: Aluminum
Adjusting screw: Steel
Elastomeric materials: Nitrile
Typical Performance Characteristics
Panel mounting hole diameter: 1.65" (42 mm)
Panel thickness:0" to 0.24" (0 to 6 mm)
0.51 (13)
2.52 (64)
2.52 (64)
2.95 (75)
1.26 (32)
5.71 (145)
2.09 (53)
1.18 (30)
∅1.65 (42)
Service Kits
Item Type Part number
30 psig (2 bar) Range
Relieving R38-100-R
Non relieving R38-100-NR
60, 105 psig (4 bar, 7 bar) Range
Relieving R38-101-R
Non relieving R38-101-NR
Service kit includes diaphragm assembly, o-ring, valve,
valve spring and 8 pan head screws.
bar g
psig
4
50
3
40
30
2
OUTLET PRESSURE
20
1
10
0
0
psig
bar g
60
4
50
3
40
30
2
OUTLET PRESSURE
20
1
10
FLOW CHARACTERISTICS -
0 4 8 12 16 20 24 scfm
0 2 4 6 8 10 dm3/s
REGULATION CHARACTERISTICS - PORT SIZE: 1/4"
MAXIMUM RECOMMENDED
FLOW THROUGH 1/4
10%
100%
200%
"
PIPE
PORT SIZE: 1/4"
INLET PRESSURE - 100 psig (7 bar g)
AIR FLOW
100% FLOW
scfm dm3/s
7.9 3.7
5 2.4
3.6 1.7
2.5 1.2
0
0
0 20 40 60 80 100 psig
0 2 4 6 8 bar g
INLET PRESSURE
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