Overview
The integral orifice meter run assembly is a differential pressure flowmeter especially designed for smaller line sizes where the surface roughness, weld seams and other geometrical imperfections have a relatively big influence on the measurement uncertainty. The DP flowmeter therefore features a minimum length of upstream and downstream pipe, reducing additional uncertainties of the installation to a minimum. It is suitable for process and allocation measurement of gases and liquids including viscous fluids, fluids with suspended solids or fluids with gas entrainment. KROHNE offers the complete orifice assembly with orifice meter run, DP transmitter, valves, accessories, engineering, and documentation. The DP flowmeter comes pressure tested and ready for commissioning.
Product features and options depend on device configuration: Contact us to make sure that your preferred functionality can be combined in one device.
- Standardised calibrated orifice assembly for high accuracy requirements
- Design acc. to ISO 5167 or ISO TR 15377 from DN15 / ½″ up to DN100 / 4”, other sizes and designs on request
- Elimination of additional uncertainties due to installation effects
- Low TCO (Total Cost of Ownership) due to reduced engineering, commissioning and installation costs
- Reduced need for recalibration in the field through advanced 3-D linearised OPTIBAR DP transmitters
- Complete flowmeter solution with orifice meter run, manifold, DP transmitter, sizing and documentation from a single source
- Redundancy available (1oo2, 2oo3)
- HART®7, Foundation fieldbus and Profibus-PA communication options
- SIL 2/3 certified versions
- Ex ia, Ex d approvals
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Specifications
Depending on selected device configuration
General information
Product type Flowmeter Product family name OPTIBAR Product positioning For process applications with small line sizes (down to DN15 / ¾″4) Measurement principle Differential pressure Measured media Liquids, Gases, Steam Nominal diameter / size DN20...DN50 / ¾'' ..2” Operating conditions
Process pressure max. 160 bar/
2320 psiProcess temperature -130…+400°C/
-202…+752°FMaterials
Measuring tube Austenitic stainless steel (1.4404/316L), Carbon steel (A105), Alloy steel (ASTM A182 Gr. F12), Alloy steel (ASTM A182 Gr. F22), Alloy steel (ASTM A182 Gr. F91) Process connections
Flange connections EN (1092-1): DN15…100
ASME (B 16.5): ½…2''Approvals/Standards
Certificates/Approvals Others Oxygen, Pressure Equipment Directive (PED), ISO/TR 11583 Certificates/Approvals Custody transfer (CT) AGA 3 Certificates/Approvals Ex ATEX, IECEx, NEPSI Certificates/Approvals Safety SIL 2/3 Design standards ISO 5167, ASME MFC-3M NAMUR compliance NE 107, NE 21, NE 43, NE 53 Communication
Analogue outputs 4…20 mA Digital outputs FOUNDATION™ fieldbus, HART®, Profibus-PA, Bluetooth Accuracy
Reference uncertainty 0.15…0.22% Calibration Volumetric calibration with hot water, Gravimetric calibration with hot water, High pressure natural gas calibration
GB 7534 
US 7250 
CA 6873 
AU 6591 
IE 4704 
NZ 1448 
BR 1116 
VN 481 
