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Piping Connections - Toshiba LF414 Instruction Manual

Electromagnetic flowmeter detector
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4.3 Piping Connections

(1a) Ideal Upstream Straight Pipe Length Installation Requirements
If various joints are used upstream of the detector outlet, the straight pipe length as
shown in Table 4.2 is required.
(1) 90°bent
(2) Tee
(3) Diffuser
(4) Fully opened sluice valve
L: Required straight pipe length—straight pipe length plus half length of the detector.
D: Nominal bore size (diameter)
NOTES
The length of a reducer, if connected, can be counted as a part of the straight pipe length.
No straight pipe length is needed on the downstream side. If a butterfly valve is installed downstream of the
detector, do not let the valve plate protrude into the pipe of the detector
(1b) Optional "Mount Anywhere" Installation
Mount-Anywhere
With Toshiba's unique, patented magnetic field distribution technology, the meter is
highly immune to upstream flow disturbances. A minimum of 1D (diameter) length of
upstream straight pipe from the flange is required to maintain the performance
specification.
NOTE
The test results were obtained and demonstrated at Toshiba's flow calibration facility,
Fuchu Japan.
Table 4.2 Required straight pipe length on the upstream side
L=5D
L
L
L
L
Technology:
L=10D
(5) Other valves (not fully opened)
- 25 -
6F8A0870
L

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