Steemco-Mas for Steam

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The EMCO Steemco-Mascompact orifice mass flow meter for steam

Benefits

• Sizes ranging from DN 40 (1½") up to DN 400 (16").
• Standardised product based on well proven and widely accepted technology.
• No moving parts.
• Not sensitive to vibrations.
• Compact design.
• Easy to install.
• High accuracy.

Typical Applications

The STEEMCO-MAS flow meters measure the flow of superheated steam within the process industries, including chemical, petro-chemical, pharmaceutical and the power industry. Mass flow of saturated steam is masured with STEEMCO and a multivariable without a temperature input. The STEEMCO-MAS is based on the principle of measuring velocity pressure and temperature, with mass flow computed by the electronics. The STEEMCO-MAS flow meters are backed by international standards covering flow calculation, manufacturing tolerances, accuracy and installation requirements. This type of fundamental technology is accepted world wide and supported by millions of successful installations.

The Steemco-Mas flow meter features are:

• Standardised product based on well proven technology.
• Compact design.
• Simple construction.
• Standardised construction means low inventory.
• No moving parts.
• Not sensitive to vibrations.
• The electronics delivers output signal linear to flow.
• Digital indicator for local flow reading.
• High accuracy.
• Wide rangeability.
• Easy to install.
• Easy to re-calibrate.

Construction

Model Steemco-Mas

The STEEMCO-MAS flow meter consists of a primary element based on the differential pressure principle, condensing pots, a 3 or 5 valve manifold valve and a multivariable transmitter with a temperature sensor. The multi variable transmitter measures the differential pressure and the static pressure and has an input connection to the temperature sensor. The flow computer housed in the transmitter performs the dynamic flow calculation.

The STEEMCO-MAS flow meter is mounted between flanges in sizes
from DN 40 (11⁄2") to DN 400 (16") in pressure ratings up to PN 40 (300 lbs).

Accessories

Remote electronic indicator with LCD is available for local flow indication and if required check/change of flow rate (differential pressure).

Principle of Measurement

The STEEMCO-MAS is a velocity flow meter. A restriction in a pipe line changes the value of respective momentum energies, in terms of static and dynamic pressure. Based on the laws of energy balance developed by Bernoulli, the sum of the energies remain constant. Increasing the velocity in the pipe line, decreases the pressure in the restriction. The pressure differential between the inlet pressure and the pressure in the restriction is measured and expressed as flow velocity. When the physical values of the fluid are known and the inner pipe diameter is established the electronics calculates the flow rate. The flow rate is expressed in an analogue signal 4 - 20 mA signal or via digital communication.

Technical Data

• Sizes : DN 40 - DN 400, 11⁄2" - 16", larger sizes on request
• Pressure rating : up to PN 40, 300 lbs, higher pressure ratings on request
• Temperature : Process : up to 400°C,
• Mounting style : Between flanges according to DIN or ANSI standards
• Flange facing : flat face (standard), raised face, DIN 2512 N, DIN 2513 R
• Overall length : 32 mm
• Material : Stainless steel AISI 316, others on request
• Design and calculation standards : ISO 5167, ASME MFC-3M.
• Vent or drain hole : On request
• β (d/D) : 0,5 and 0,6; other β on request.
• Accuracy : +/- 1.2 %
• Rangeability : 8:1
• Repeatability : better than 0,1 %
• Pressure loss : typical 150 mbar for liquid flow, and 50 mbar for gas flow (values are given at full flow)
• Reynolds No : Re > 5000
• Allowable differential pressure : max 2,5 bar
• Output signal : analogue 4 - 20 mA or Digital communication via protocol, HART, PROFIBUS, Fieldbus Foundation or others.
• Local indicator (option): LCD showing flowing units or %
• Power supply : 14 - 36 Vdc, typical 24 Vdc.
• Max load (24 Vdc) : 700 Ohm
• Enclosure : IP 67
• Ex protection : intrinsically safe EEx ia IIC T6,Explosion proof EEx d IIC T6
• Temperature : Ambient : -40 - +80°C

Sizes

DIN Flanges

 ANSI flanges

Overall Dimensions

Installation Requirements

The STEEMCO-MAS flow meter can be mounted in a horizontal or vertical pipe. The condensing pot arrangement shall be mounted horizontally with the outlet pointing downwards. To insure high accuracy of measurement, long straight pipe runs up-stream from the flow meter is necessary. The required straight pipe run depends on the disturbance upstream. To maintain the 1.2% accuracy the minimum straight pipe run upstream shall be 14 x inner pipe diameter and 6 x downstream If an additional inaccuracy of 1⁄2 % is acceptable the required straight pipe runs are reduced to half of the above values. If mass flow is required for saturated steam, ask for a multivariabe tranmitter and the STEEMCO meter.

Works with:-

Differential pressure transmitters:-IDP10; IDP15; IDP25; IDP31; IDP50
And all our Absolute Pressure and Gauge Pressure transmitters, Temperature sensors and mass flow computers.
MultiVariable Transmitters :- IMV25, IMV30

Supplied by DP-Flow