Product application, installation and service manual
ELIS PLZE
Ň
a. s.
Ultrasonic Flow Meter SONOELIS SE 4015 and SE 4025
Page 10 of 44
ELIS PLZE
Ň
a. s., Lu
č
ní 15, P. O. BOX 126, 304 26 Plze
ň
, Czech Republic, tel.: +420/377 517 711, fax: +420/377 517 722
Es 90 337 K/c
5. PROJECT DESIGN AND METER INSTALLATION
5.1 Project design of systems including ultrasonic flow meters
In designing any project it is necessary to observe specific rules concerning placement of the meter sensors in
piping so that the measuring precision would not be adversely affected. In the case of the SONOELIC flow meters, the
required lengths of straight piping sections before and after the meter sensor are 5DN and 3DN, respectively (see Fig.
7).
FLOW DIRECTION
3 DN
5 DN
5 DN
3 DN
FLOW DIRECTION
Fig. 7 Minimum lengths of straight piping sections Fig. 8 Minimum length of straight piping section at
the input side of closing valve
If there is a pump near the meter sensor, it should be located at the distance of at least 20DN from the sensor
output (see Fig. 9).
20 DN
FLOW DIRECTION
Fig. 9 Minimum length of straight piping section before a pump
In cases where complete flooding of the piping cannot be guaranteed at all times, the meter sensor should be
located so as to ensure meeting of this condition (see Fig. 10).
FLOW DIRECTION
5 D
N
3 D
N
FL
OW
D
IR
EC
TI
ON
3 DN
5 DN
Fig. 10 Sensor locations ensuring complete flooding at all times
If the sensor is to be fitted into a vertical piping section, the fluid flow direction in such section shall be upwards (see
Fig. 11).
