Dwyer Instruments SERIES DR4 Catalog Page
SERIES DR4
1-1/2
VALVE OPEN
VALVE CLOSED
HIGH FLOW GLASS FLOWMETERS
FLOW
Direct Reading, 127 mm Scale, ±10% Full-Scale Accuracy
Series DR4 High Flow Glass Flowmeters offer a simplied solution to the problem
of uid ow indication at higher capacity levels. Flowmeters have a direct reading
scale for air or water and are designed to withstand even the harshest industrial
applications. Permanently fused ceramic scale has integral oat guides for optimum
oat performance. Reective plastic background and 1.5 X magnication lens reduces
eye fatigue and allows for more accurate readings. Units include a safety blow-out
back panel for additional protection.
MODEL CHART (127 MM SCALE)
Without Valve With Valve Flow Rate (Air) Flow Rate (H2O)
Brass SS Brass SS scfm (SLPM) GPM (LPM)
Flowmeters, Variable Area
DR4101
DR4103
DR4104
DR4106
DR4108
DR4109
DR4201
DR4203
DR4204
DR4206
DR4208
DR4209
DR4141
DR4143
DR4144
DR4146
DR4148
DR4149
DR4241
DR4243
DR4244
DR4246
DR4248
DR4249
0.2-4 (5-120)
0.5-11 (20-320)
1-16 (20-500)
–
–
–
–
–
–
0.1-2 (0.5-8)
0.2-4 (1-16)
0.5-5 (1-22)
[38.1]
127 MM
SCALE
LENGTH
1-1/2
[38.1]
SPECIFICATIONS
Service: Compatible gases or liquids.
Wetted Materials: Flowtube: Borosilicate glass; Float: 316 SS; Float stops:
PTFE; End ttings: Brass or 316 SS; O-rings: Buna-N on brass models and
uoroelastomer on SS models.
Temperature Limits: 250°F (121°C).
Pressure Limits: 200 psig (13.8 bar).
Accuracy: ±10% FS @ 70°F (21.1°C) and 14.7 psia (1 atm absolute).
Repeatability: ±0.25% of scale reading.
Scale: Direct reading 127 mm scales for air or water.
Turn-down Ratio: 10:1.
Connection: 3/8˝ female NPT.
Mounting: Vertical.
Valve: 6-turn needle (standard on models with valve).
Add sufx “M” for metric scale.
1/4 HEX NUT
10-3/8
[264]
[229]
11/16
[17.5]
9
FEMALE
3/4
[19]
3/8
NPT
7/8
HEX
1-3/8
[35]
22/32
[17.46]
1-1/2 [38.1]
5/8 [15.88]
USA: California Proposition 65
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
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