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Perforated plate straightener
The following options are available for the straighteners:
Perforated plate straightener RMG L1 - L3
according to ISO 5167-1 and DIN 1952
Characteristics
Hole diameter d
Plate thickness e
Clearance a
Opening ratio m
Dynamic pressure
loss ∆p
With the RMG turbine meters, these straighteners fulfill the requirements of technical
guideline G 13 and are approved with approval number D 81 / 7.211.10 for turbine
meters.
1.4.2.7
Standards / guidelines
All RMG turbine meters have passed upstream perturbation measurements accord-
ing to OIML recommendation IR-32/89, Annex A, with slight and heavy upstream per-
turbation. Therefore, this meter design fulfills the installation conditions according to
technical guideline G 13, section 1. The PTB testing vol. 29 and 30, testing of volume
gas meters with air at atmospheric pressure and high-pressure testing rules apply as
a testing requirement. The RMG turbine meter TME 400 conforms to EN12261. The
measuring accuracy in the range of 0.2 Q
(see chapter 1.4.2.9 Measuring accuracy). The TME 400 has an electronic suppres-
sion by external shut-down of the totalizer of the slow down cutoff of the turbine
wheel after the flow is stopped.
Perforate plate straightener RMG LP-35
ISO/DIN
d ≤ 0.05 D
e ≥ d
0.5 D ≤ a ≤ 1 D
0.2 ≤ m ≤ 0.4
5 - 15 (c² ρ / 2)
to Q
max
L1-L3
RMG LP-35
0.04 D
0.13 D
e = d
0.13 D
0.5 D
0.3
0.6
2 - 15 (c² ρ / 2)
is between ± 1.0 % to 1.5 %
max
Manual TME400-VMF · EN11 · January 22nd, 2024
1 Introduction
31
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