A differential pressure flowmeter measures fluid flow by detecting the pressure difference across a restriction.
It typically uses devices like orifice plates, venturi tubes, or flow nozzles.
The pressure drop created is proportional to the flow rate of the fluid.Differential Pressure (DP) flow meters for gas service are crucial components for measuring flow rates in industries like oil & gas and chemical processing, typically operating in high-pressure and high-temperature environments.
These flowmeters are widely used in industries such as oil, gas, and water treatment.
They are valued for their reliability, simplicity, and suitability for various flow measurement applications.
Accuracy
Calibrated Uncalibrated within ±0.5% at design flowrate
typically within ±1.5% at design flowrate
Pressure loss
5 to 12% of differential head, dependent on the beta ratio
(throat/pipe diameter ratio)
Maximum working pressure
Dependent on the material selection and application
Maximum working temperature
Dependent on the material selection and application
Pipeline size range (standard)
25 to 1200mm (1 to 48 in.)
Fittings for larger pipelines are available to special order
Standard materials and finishes
Carbon steel
BS1501-151-430A; ASTM A105N/ASTM A106GRB
Stainless steel
BS 1502 316S31; ASTM A240 316;
ASTM A182 F316; ASTM A312 TP 316
ABB can supply Venturi tubes in other materials and finishes to
suit particular applications. Advice given on receipt of application
details
All tubes are tested in accordance with the relevant code of
practice or to customers' specific requirements
Flanges
Standard sizes to suit pressure rating and mating flanges
Tappings
1/2 in. NPT as standard. Also available as 1/2 in. BSPT, 1/2 in. socket
weld connection, 1/2 in. NB Nipolet, 1/2 in. NB Nipoflanges, etc.
Testing/Documentation
A full range of applicable
