JET 9400 Metering Station Instruction Manual
- June 4, 2024
- JET
Table of Contents
JET 9400 Metering Station Instruction Manual
How to use the JET 9400 Metering Stations (Installation, Operating, and Maintenance Instructions)
GENERAL INFORMATION
JET 9400 metering stations are used to measure the flow passing through the pipework of a system in which they are installed by measuring the differential pressure between the test points. The JET 9400 Metering Station is intended to be used for nonhazardous liquids only. These include liquids in the Group 2 fluid classification as defined by the Pressure Equipment Directive (Dir. 2014/68/EU). This, together with the Pressure/Temperature rating shown overleaf (Table 1), places the JET 9400 in the SEP category, for which the CE logo is not required.
PRESSURE AND TEMPERATURE RATINGS
- Table 1 (*) = Only for below zero water temperatures where antifreeze fluids have been added.
- (**) = Only for water temperatures over 100°C where anti-boiling fluids have been added.
The operative conditions shown above are intended for non-shock operating
conditions: water hammer, impacts, stress loads, corrosive or erosive external
environmental elements, and fluids with abrasive properties should be avoided.
INSTALLATION
JET 9400 valves ½” and ¾” have male/female end threaded connections (ISO 228/1).JET 9400 valves from 1” to 2” have male/female end threaded connections (ISO 7/1 Rp). It is important that the flow direction matches the direction of the arrow indicated on the valve body. In order to obtain the best flow measurement accuracy, it is advisable to install the JET 9400 valves:
- Using pipework of the same nominal size as the valve;
- With a minimum straight pipe length (equal to 5x Pipework Diameter) at the inlet (10x when installed at the outlet of a pump) and a length of 2x Pipework Diameter at
- he outlet.
- Avoid using any material to connect the pipes that may obstruct part of the flow around the valve. Please ensure there are no burrs present on the pipe ends themselves that protrude inside the bore and obstruct part of the flow (it’s advisable to flush the line before installation or after subsequent maintenance on the system).The valves should be installed in such a way so that the pipeline does not subject the valve to any torsion, bending or tension.
- During the installation, please ensure to leave sufficient space around the test points in order to allow enough room to connect the manometer probe.
- FLOW MEASUREMENTS – the Fig. Number of the valve type;
The flow passing through the valve can be derived at any moment from the differential pressure signal measured at the two test points (see flow chart above). Versions for low flows are identified by a letter marked on the body, next to the nominal diameter indication (L for low flows, U for very low flows).
VALVE TAG
JET 9400 valves are supplied with a data tag indicating:
- the Fig. Number of the valve type;
- the nominal size;
- the value of the flow coefficient Kvs
On the tag there is sufficient room to write the desired flowrate or the pressure signal. The tag can be fixed to the valve with the provided plastic tie. By keeping the tie long, it is possible to leave the tag on the outside of any thermal isolation, thus simplifying the identification of the insulated device.
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