Barksdale BFS-30 N User manual

Art.-Nr.: 923-1938
Index ), .0.201
Specifications are subject to
changes without notice.
21
1. Installation
Operating of the BFS-30 N/L flow monitors and indicators is based on the movement of a
spring-loaded piston within a cylindrical tube. The instrument can be mounted in any position
in a system. Flow direction is from the lowest to the highest value, indicated on the scale. The
viscosity-compenstion is achieved by the combination of the spring and the calibrated orifice
inside the piston and guaranties high accuracy over a viscosity range up to 600 cSt.
The flow media must be free of particle contamination, otherwise the instruments will not func-
tion properly. Particularly magnetic particles may cause faults. We recommend the use of dirt
filters or magnetic filters. All non standard applications should be discussed with our technical
engineers.
The flow monitors must not be positioned in inductive or magnetic fields. Minimum distance
from iron parts: 10 mm.
All connection sizes comply with the R-standard (DIN 2999, part 1). Only suitable thread and
sealing material should be used for installation, otherwise the correct function of the equipment
may be affected.
To avoid the risk of measure faults, the upstream line should be 10 x D and the downstream
line 5 x D (where D = internal diameter of the tube).
The highest accuracy will be reached by mounting the flow monitors vertically, with flow direc-
tion from bottom to the top.
When screwing the fittings, take care of the max. lengh of the threads. Too long threads
may cause damage of the flow monitor.
(BFS-30-O:
When screwing the fittings, the flowmeter threads must be fixed with a spanner. Never
rotate the flowmeter connections inside the aluminum sleeve. This may cause leakage
or breaking of the glass.)
All model provided with a switch should be protected from electrical overload. Never exceed
the given maximum switch capacity, not even for short periods. The embedded reedswitch is
very sensitive for specifically inductive loads, which may occur at closing or opening and which
can up to 10 times the given nominal value of the coil. Use protecting relays or other precauti-
ons in such cases.
Our reedswitch are gold-rhodium-plated, which allow direct connecting to SPS-systems.
Operating Instructions Flow monitor Type BFS-30 N / L
and Flow monitor Type BFS-30-O
Barksdale GmbH
Dorn-Assenheimer Strasse 27
D-61203 Reichelsheim / Germany
Tel.: +49 - 60 35 - 9 49-0
Fax: +49 - 60 35 - 9 49-111 and 9 49-113
e-mail: [email protected]
www.barksdale.de
(NO) (SPDT)
Wiring diagram
23 2
11
2. Standard wiring diagram for switches,
provided with connector:
3. Adjusting the switching points
The switchpoint should be adjusted on the scale of the flowswitch. Please notice that the
switch point is always the shutdown point. That means the contact will open when the flow-
rate is decreasing to the adjusted switchpoint. So the NO opens in case of an alarm.
To adjust the switching contacts an ohmmeter, continuity tester or similar tool is required.
(NO) connection: Pin 1 & 2, (SPDT) connection: Pin 1 & 3
Units without optical indication (N/L-models)
a) Loosen the lock screw of the switch contact.
b) Shift the switch contact until the arrow on the switch contact is in coincidence with the
desired flow rate value on the range.
c) Tighten the lock screw of the switch contact.
Units without optical indication (O-models)
1. Adjustment of the removed unit:
a) Shift the switch housing from the centre of the adjustment range to the input side,
until the contact closes.
b) Shift the piston with a non-magnetic tool (e. g. a pencil) until the needle shows the
desired flow rate (contact closed).
c) Shift the switch housing slowly to the output side until the contact just opens.
At this point locate the switch housing with the lock screws.
2. Adjustment of the mounted unit:
a) see 1. a)
b) Open supply until the needle shows the minimal flow rate desired.
(contact closed)
c) see 1. c)
4. Maintenance
The flowmeters are free of maintenance because of the few mechanical parts. For security
reason we advice to check the flowmeters from time to time.

Operating data BFS-30-O
Pressure MS 250 bar
Pressure VA 300 bar
Pressure drop 0,02 - 0,4 bar
Temperatuer max. 120 °C
Electrical data*
Normally open 250 V - 3 A - 100 VA
Change over** 250 V - 1,5 A - 50 VA
Protection IP65
Materials brass stainl. steel
Housing brass 1.4571
Float brass 1.4571
Spring 1.4571 1.4571
Seals Perbunan, Viton or EPDM
Accuracy ±10% of FS
Electrical connection acc. to DIN 43650 or with 1 m cable
6. Technical data:
Operating data BFS-30-N BFS-30-L
Pressure MS / MS with GL 250 bar / 100 bar 300 bar / 100 bar
Pressure VA 300 bar 350 bar
Pressure drop 0,02 - 0,4 bar 0,02 - 0,2 bar
Temperature max. 120 °C 120 °C
Electrical data*
Normally open 250 V - 3 A - 100 VA 230 V - 3 A - 60 VA
Change over** 250 V - 1,5 A - 50 VA 250 V - 1,5 A - 50 VA
Protection IP65 IP65
Materials brass stainl. steel brass stainl. steel
Housing brass 1.4571 brass 1.4571
Float brass 1.4571 brass 1.4571
Spring 1.4571 1.4571 1.4571 1.4571
Seals Perbunan, Viton or EPDM
Accuracy ±10% of FS ±10% of FS
Electrical connection acc. to DIN 43650 or with 1 m cable
43
Dimensions (in mm)
BFS-30-N / L
BFS-30-O
G
L
D
ø1
W
D
G
L
ø
W
D
(BFS-30-L)
* Data only for application in non explosive atmosphere
(G) G 1/4 G 1/2 G 3/4 G 1
(hex) 34 34 34 40
(ø) 40 40 40 40
(W) 76 76 76 76
(D) 21 21 21 17
(L) 152 152 152 130
Weight (g) 1590 1515 1430 1250
(G) G 1/4 G 1/2 G 3/4 G 1 1/2“
(hex) 34 34 34 40 27
(ø) 40 40 40 40 31
(W) 76 76 76 76 52
(D) 21 21 21 17 14
(L) 152 152 152 130 90
Weight (g) 1500 1425 1340 1160 350
hex
5. Switch versions for hazardous locations
As option there is an intrinsically safe approved version for G and D environments according to
ATEX regulations. These switches, marked with EEx ia label, must be operated with a certified
switch amplifier according to the applicable regulations.
Design conditions, approval data and instructions must be observed carefully. Installation and
operation must be performed by trained personnel only.
Approval data: Approved for: II 1 GD Ex ia IIB T6 Ga, Ex ia IIIC T100°C Da
Certificate-No.: ISSeP08ATEX016X/1
Electrical data for intrinsically safe application: Ui = 28 V Ci = 40 pF
Ii = 50 mA Li = 4 µH
** Minimum load: 3 VA
Contact rating for SPS-applications: 200 V, 1 A, 20 VA (Please request)
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