The EMCO Meter Run is used as a primary element in flow measurement of liquid, gas and steam applications based on the differential pressure principle. According to this working principle, the orifice plate creates a flow restriction within the meter run to allow measurement of the resulting pressure drop and flow rate. Our orifice plates have been tested and tried for over 50 years and measure up to the highest industry and compliance standards.
The Meter Run Series MSRS and MSRF combine the orifice plate with a straight pipe run ro enhance the flow profile. The construction includes carrier rings and corner pressure tappings.
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Design and calculation standards
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ISO 5167, ISO/TR 15377, BS 1042, ASME Fluid Meters, DIN 19205Shell Flow Meter Engineering Handbook
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Sizes
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DN 10 – DN 50, 3/8” - 2"
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Pressure rating
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PN 10 - 400, 150 - 2500 lbs
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Plate thickness
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3 mm
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Vent or drain hole
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On request
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Plate material
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AISI 316, other on request.
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Carrier ring and pipe material
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Carbon steel, AISI 316, other materials on request
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Pipe run
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Can be honed for increased accuracy
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Flange standards
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DIN, AISI B 16.5
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Pressure taps
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3/8", 1/2" BSP, Ø 12 mm, 1/2" NPT.int.
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Male tappings
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On request
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Connection
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Weld ends or flanges with flat or raised face or groove according to DIN 2526, 2513 or 2512, or RF and RTJ according to ANSI B 16.5
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Orifice plate shapes
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Square edge concentric, other shapes on request. Orifice plates are bevelled on the downstream side
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Marking
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The orifice plate is marked with "+" and"-" and flow direction.
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Accuracy
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+/- 0,8 - 1 %
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Pressure loss
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Depending on β, for β equal to 0,6 : ca. 60 % of the differential pressure measured
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Limits for Reynolds No
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Re > 1260 x β2 D according to ISO 5167 2000 < Re < 108 according to ASME MFC-3M
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Shut-off valves and condensing chambers for steam flow measurement. Flange assembly complete with bolts, nuts and gaskets
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DN |
Inches |
Total length (mm) |
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10
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3/8”
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400
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15
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½”
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550
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20
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¾”
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700
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25
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1”
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900
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32
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1 ¼”
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1100
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40
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1 ½”
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1300
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50
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2”
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1500
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Before installation, the orifice plate must be kept clean and protected against corrosion and physical damage. It is also important that you pay careful attention to to the sharp edge of the plate. Once ensured that it is clean, install the orifice plate carefully such that the orifice bore aligns with the centre of the pipeline. Tap location varies depending on whether it is used for liquid, gas or steam. It is not supplied with any safety devices and must not be used for higher pressure, than stated on the name plate. The pipe system must therefore be equipped with a safety device. However, this type of primary element requires no special maintenance.
Download the installation guide above for more detailed information.
