IFOA INTEGRAL ORIFICE PNEUMATIC TRANSMITTER FOXBORO

The IFOA integral flow orifice assembly is used in conjunction with a Foxboro electronic or pneumatic differential pressure transmitter. This combination uses the differential pressure created by the orifice to measure liquid, gas, and steam flow in 1/2, 1, and 1 1/2 in (approximately 15, 25, and 40 mm) pipes. When the highest accuracy is required, the associated piping (meter run) is supplied welded to the assembly body.

In addition, the very low flow-rate measuring capability of the 1/2 in size can be further extended by using an orifice plate with a jewel insert. These inserts have a very precise bore, which can be as small as 0.0508 mm (0.002 in).

The orifice assembly is installed in the process line and becomes part of the piping. The transmitter can either be bolted directly to the orifice assembly body (close-coupled); or, if the optional remote connectors are used, the transmitter can be mounted away from the orifice assembly (remote connected).

This instruction covers only the integral orifice assembly. For details on the particular transmitter used with the assembly, refer to Table 1.