These differential pressure flowmeters are of the most common use, in all measurements with liquids, gases or steam in various industries. They are
designed for various operating conditions, under normal conditions (Water supply, swimming pool, etc.) as well as with high pressure and temperature (Steam,
hydrocarbons, etc.) and aggressive fluids. They are economical, reliable for natural gas or wet gas measurements. The orifice flow-meter (differential pressure
flowmeter) covers a wide range of piping diameters.

The device works according to the principle of differential pressure, proportional to the square of the volume rate of flow through the pipeline. A DDM flow-meter consists of an orifice plate, integrated into an armature, flanged or with unions fittings. The low and high pressure outlets on either side of the plate can be connected to a differential pressure sensor (pressure gauge, pressure switch, differential pressure transmitter).

The reliability of the measurement depends of the constant flow at the measuring
point. The region of steady flow should covers piping distances of 6 DN upstream
and 4 DN downstream of the device.

Several versions in steel, stainless steel or brass are available:
DDM-DN Wafer, flanges acc. DIN EN 1092-1
DDM-Gi Female threads acc. DIN EN ISO 228
DDM-Ga Male threads acc. DIN EN ISO 228
DDM-Rp Unions acc. DIN EN 10226-1 (ISO 7-1)

• Every BAMO Kirchner instrument is tested in conformity with EC directives.
• The corresponding declaration of conformity is available on request.
• The current version in force is available on our WEB site.
• Our production center Kirchner, is certified DIN EN ISO 9001: 2015