METER TUBE WITH CENTRIC ORIFICE PLATE OF DN 200 UP TO DN 1,000

This meter tube is a complete set consisting of the centric orifice plate and straight lengths of piping on the inlet and outlet. The meter tube design is divided into three sections: inlet, in which the fluid flow is straightened, measuring section (orifice plate) and outlet.

Straight lengths of piping in the meter tube comply with all conditions of dimensional and geometric accuracy defined by ISO 5167 standard that are related to pipe sections adjoining the orifice plate. This layout guarantees entrance of stabilized fluid flow into the primary element and accurate measurement of flow rate. Conception of meter tubes also minimizes nonconformities during assembly of orifice plates and their subsequent operation. Division of meter tubes to individual sections also enables easier maintenance inspection or subsequent verification of the meter.

There are chamber differential pressure tappings and these are incorporated in the body of flanges, between which the disc is placed and sealed. The disc is thoroughly centred between the flanges by a simple construction placement. The set of the meter tube consists of stainless steel distance bolts embedded in the flanges clutching the disc. These distance bolts greatly facilitate dismantling and subsequent assembly of the disc. The pressure tapping is led out of the flanges. Upon agreement with the customers outlets of differential pressure are always customized to various options of primary element attachment to the measuring circuit.

The meter tube with centric orifice plate is manufactured in nominal diameters ranging from DN 50 up to DN 1,000. The meter tube with centric orifice plate in nominal diameters DN 200 up to DN 1,000 is manufactured with straight lengths 2D “upstream” the orifice plate and 2D section “downstream” the orifice plate. 2D section “downstream” the orifice plate is ended by a flange and it can be also supplemented by counter-flange including supply of jointing materials (fasteners) and sealing, 2D section “upstream” the orifice plate is ended by preparation for weld. Upon agreement with customers, 2D section “upstream” the orifice plate can be ended by a flange. The meter tube can be equipped with 8D section with metrological verification supplementing the inlet section “downstream” the orifice plate to total 10D length.

Carbon, stainless or refractory alloyed steel are the most used steels for the production of meter tubes. The disc of the centric orifice plate is made of stainless steel as a standard. Upon agreement the meter tube can be made of the plastic materials, too.

The meter tube with centric orifice plate is manufactured either as a working meter or, as a specified meter with metrological verification complying with the technical particulars and conditions of pattern approval.

Upon agreement the meter tube with centric orifice plate can also be manufactured with extended straight lengths of piping or, in DN range different than stated above. The meter tube can be incorporated both in vertical and in horizontal piping.

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