Learn about Positive Displacement Measuring Principles.
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Positive Displacement Capabilities
| Technology |
Model/
Series |
Gas Flow |
Liquid Flow |
Steam Flow |
Line Size |
Temperature |
Pressure |
Viscosity |
Accuracy |
Considerations |
Positive
Displacement |
ALPD |
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Liquids must be clean |
Positive Displacement Flow Meters
| ALPD Family |
| Technology |
Model |
Line Sizes |
Flow Rate |
Viscosity |
Accuracy |
Pressures |
Temperature |
Materials |
Bi-Rotor |
ALBRPD |
¼"-16"
(8-400mm) |
0.26-8800 GPM
(1-33,333 LPM) |
0～20,000 cP |
±0.5% (Std),
±0.2%, 0.1% (Opt) |
930 psig
(64 barg) |
-22 ~ 480 °F
(-30°- 250 °C) |
CS (Std), 304SS or 316SS (Opt) |
Gear |
ALGPD |
¼"-1 ½"
(6-32mm) |
0.001 to 264 GPM
(0.005 to 1000 LPM) |
5 ~ 25,000 cP |
±0.25% |
10,000 psig
(690 Barg) |
356 °F
(180 °C) |
SS per DIN 1.4305/AISI 303 or 1.4571/AISI 316 Ti |
Helical Rotor |
ALHPD |
¼"- 1½" FNPT
(6 to 40 mm) |
0.002 to 105 GPM
(0.01 to 400 LPM) |
30 ~ 1,000,000 cP |
±0.25% |
5800 psig
(400 Barg) |
302 °F
(150 °C) |
SS DIN 1.4571/1.4435
(SS316 Ti/316L) |
Oscillating Piston |
ALOSPD |
½"-2"
(15mm- 50mm) |
(0.8-500 LPM)
0.25 to 140 GPM |
0～1,000 cP |
±0.5% |
580 psig
(40 barg) |
530 °F
(280°C) |
CS (Std), 304SS or 316SS (Opt) |
Oval Gear |
ALOVPD |
¼"-10"
(8-250mm) |
0.04 -2,332 GPM
(0.16- 8800 LPM) |
0～1,000 cP |
±0.5% (Std),
±0.2% (Opt) |
870 psig
(60 barg) |
752 °F
(400°C) |
CS (Std), 304SS or 316SS (Opt) |