steemco vertical mount

The EMCO Steemco-Mascompact orifice mass flow meter for steam


  • 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.

steemco mas


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).



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


DIN Flanges

SizePipe ODPressure ratingInner pipe diameterß = 0,5 Boreß = 0,6 BoreBA1A2
DN 4048,3PN 4043,121,526,090147157
DN 5060,3PN 4054,527,332,0107156166
DN 6576,1PN 4070,335,042,0127166176
DN 8088,9PN 4082,541,049,5142173183
DN 100114,3PN 16107,154,064,0162183193
DN 100114,3PN 40107,154,064,0168186196
DN 125139,7PN 16131,766,079,0192198208
DN 125139,7PN 40131,766,079,0194199209
DN 150168,3PN 16159,380,096,0218211221
DN 150168,3PN 40159,380,096,0224214224
DN 200219,1PN 16207,3104,0124,4273239249
DN 200219,1PN 25206,5104,0124,4284244254
DN 200219,1PN 40206,5104,0124,4290247257
DN 250273PN 16260,4130,0156,0329267277
DN 250273PN 25258,8130,0156,0340272282
DN 250273PN 40258,8130,0156,0352278288
DN 300323,9PN 10309,7155,0185,0378291301
DN 300323,9PN 16309,7155,0185,0384294304
DN 300323,9PN 25307,9155,0185,0400302312
DN 300323,9PN 40307,9155,0185,0417311321
DN 350355,6PN 10341,4170,0204,0438321331
DN 350355,6PN 16339,6170,0204,0444324334
DN 350355,6PN 25339,6170,0204,0457331341
DN 350355,6PN 40338,0170,0204,0474339349
DN 400406,4PN 10392,2195,0234,0489341351
DN 400406,4PN 16390,4195,0234,0495350360
DN 400406,4PN 25388,8195,0234,0514359369
DN 400406,4PN 40384,4195,0234,0546375385

 ANSI flanges

SizePipePressureSch. 10SSch. 40Sch. 80ß=05 Bore.ß=06 Bore.BA1A2
 ODratingInner pipeInner pipeInner pipe     
  300lbs     95,3150160
  300lbs     111,1158168
  300lbs     149,1177187
  300lbs     181,1193203
  300lbs     279,4242252
  300lbs     308256266
  300lbs     362283293
  300lbs     422,3313323
  300lbs     485,8345355
  300lbs     539,8372382

Overall Dimensions

steemco mas ga

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

Download Manual (Not Available)

If you require further information on this product or would like a quotation, please contact dp-flow on:

sales +44(0)1865 600245