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1. DESCRIPTION
Flow switches PLJ & PLJ EN are devices meant to control the flow of liquids.
Flow switch PLJ is available with 1" NPT-M or 1" GAS-M connection.
Flow switch PLJ EN is available with 1" GAS-M connection and it's in compliance with the EN 12259-5:2003
Standard entitled «Fixed firefighting systems Part 5 - Water flow detectors».
2. TECHNICAL SPECIFICATIONS
Metal parts material
Maximum working pressure
Room temperature limits
Liquid temperature limits
Protection rating
Set of vanes material
Housing material
Pressacavi
Contact
3. ELECTRICAL CONNECTIONS
The COM-NC contact closes, at the calibration value, when the flow increases.
The COM-NO contact opens, at the calibration value, when the flow decreases.
4. INSTALLATION
Flow switches PLJ & PLJ EN can be mounted in any position.
The arrow must be oriented in the direction of the flow.
In the event of installation with vertical pipes, the instrument needs recalibrating to
compensate for the weight of the vanes.
Fit the instrument along a straight run of the piping, in the absence of filters, valves, etc.
and along at least five times its diameter, both upstream and downstream.
It's possible to adjust the calibration of the instrument tightening or unscrewing the screw
shown in the picture.
24010 Ponteranica (Bergamo) ITALY - Via Serena, 10 - Tel. +39 035 4530211 - Fax +39 035 570546 - www.officineorobiche.it-e-mail:info@officineorobiche.it
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NOV. 2020
OFFICINE OROBICHE S.r.l.
ISTRUCTION MANUAL
Flow Switches PLJ & PLJ EN Series
PLJ Series
Stainless steel
25 bar
-20 °C / 85 °C
-30 °C / 120 °C
IP65
Stainless steel
ABS
M14
Micro-switch SPDT 15 (8A)
24/250 VAC
Informazioni soggette a variazioni senza preavviso
PLJ EN Series
Stainless steel compliant to EN-12259-5
25 bar
-20 °C / 85 °C
-30 °C / 120 °C
IP65
Stainless steel compliant to EN-12259-5
Painted aluminium
M20
Micro-switch SPDT 15A 125/250 VAC - 5A
24 VDC
/
1
3
IST/198-I
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Summary of Contents for OFFICINE OROBICHE PLJ Series
- Page 1 OFFICINE OROBICHE S.r.l. ISTRUCTION MANUAL Flow Switches PLJ & PLJ EN Series 1. DESCRIPTION Flow switches PLJ & PLJ EN are devices meant to control the flow of liquids. Flow switch PLJ is available with 1” NPT-M or 1” GAS-M connection.
- Page 2 OFFICINE OROBICHE S.r.l. The instrument is delivered equipped with 5 vanes. If necessary, the vanes can be cut by reference to the inner diameter of the piping. PADDLE DIMENSION TABLE OF FLOWS Piping Ø Min setting (m3/h) Max setting (m3/h) 1”...
- Page 3 OFFICINE OROBICHE S.r.l. 5. MAINTENANCE We recommend routing inspections (roughly once every 6 months) to guarantee the efficiency of the instrument. If it’s possible to remove the instrument, check the good operating of the flow switch by moving the paddle. If not, check the good operating of the micro-switch by simply moving the hinge lever.