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INSTRUCTION MANUAL FOR FLOW SWITCHES
1.INSTRUMENT DESCRIPTION
Flow switches PL series are designed to be mounted in an upright position along horizontal pipes.
These models are equipped with a tripping device, which can be equipped with single (SPDT) or double (DPDT) exchange
contacts for high or low flow rate control and/or alarms.
2. MODEL IDENTIFICATION
11 12 13 14 15 16 17 18 19 20
PL
.
24010 Ponteranica (Bergamo) ITALY - via Serena, 10 - Tel. 0039/035/4530211 - Fax 0039/035/570546 - www.officineorobiche.it-e-mail:info@officineorobiche.it
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JULY '14
OFFICINE OROBICHE S.p.A.
Model
Body material
Acc
304
316
A
I
Internal material/Paddle
2
SPDT
.
.
Information subject to change without prior notice
PL SERIES
J
AISI 316
Contact
DPDT
Ø
2
HG Bulb
VD
Water-proof
Ermet.Sealed
Golde- Contacts
with inert gas
M6
Water-proof
.
.
.
Contact type
Direct
Base
Current
M2
M3
Pneumatic
Aluminium
M14
Case
Ex-d
WP
EP
Finning
Ø
R1
R4
Special
version
.
xx
1/7
Water-proof
M4
PNA
R3
IST/158-I
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Summary of Contents for OFFICINE OROBICHE PL Series
- Page 1 PL SERIES 1.INSTRUMENT DESCRIPTION Flow switches PL series are designed to be mounted in an upright position along horizontal pipes. These models are equipped with a tripping device, which can be equipped with single (SPDT) or double (DPDT) exchange contacts for high or low flow rate control and/or alarms.
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Page 2: Operating Principle
OFFICINE OROBICHE S.p.A. 3. OPERATING PRINCIPLE To the paddle(1), which is soaked in the fluid, through a rod, a small piston (2) made from magnetic stainless steel is connected; this small piston is housed in a pit (3) made from non-magnetic material. -
Page 3: Maintenance
OFFICINE OROBICHE S.p.A. 5. SETTING AT WORK Make sure that the use of the instrument does not exceed the intended conditions of use (higher temperature and pressure values, lower flow rates) and that the applied electrical rating value complies with the rating plate values. - Page 4 OFFICINE OROBICHE S.p.A. 7.5 REPLACING THE UNIT AND/OR MICRO-SWITCH a - use a gauge to measure the position of the switch unit; b - disconnect the wires from the terminal board (make a note of the original connections) and remove the switch unit by loosening the screw (2);...
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Page 5: Liquid Temperature
OFFICINE OROBICHE S.p.A. 9. DRAWINGS OF CASE WITH DIMENSIONS ELECTRICAL CONNECTIONS ∅ A CODE LIQUID TEMPERATURE ∅ -10÷+135 -11÷-80 1/2” NPT 1/2” NPT +136÷+250 3/4” NPT 3/4” NPT +251÷+400 1/2” UNI 6125 1/2” (GAS) ISO 228/1 3/4” UNI 6125 3/4” (GAS) ISO 228/1 ISO M20 x 1.5... - Page 6 OFFICINE OROBICHE S.p.A. WP CASE (WATER PROOF IP 66) 10. RECOMMENDED SPARE PARTS (*) When ordering spare parts, always indicate the instrument’s serial number. You can find it on the ratings plate on the case (see Pos.9) and has 5 digits preceded by the letter “F” (e.g.: F45678).
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Page 7: 11. Troubleshooting
Officine Orobiche may not be held liable for any improper use of its products where these are used for ends other than those indicated in the specifications forming part of the order.