SF_Flow_switch_Riels0 pages

SF

FLOW SWITCH
FOR LIQUID

FLOW CONTROLS

Liquid Flow Switches
Function
Flow control of aggressive media, water and normal media (depending
on model).
Alarm signal of flow shortage (safety switch).
Available in brass, suitable for normal media, and in stainless steel
AISI316L, suitable for sea water and aggressive media.
Applications
Well-suited in pipes of general industrial plants:
- heating and air conditioning systems;
- refrigeration systems;
- sprinkler or anti-fire systems;

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- heat pumps;
- devices for oil monitoring;

SF3E...6E

SF1

SF2

- lubrification circuits.

Pipe
Ø

SF1K/RL
SF1E/RL*
SF1RE/RL
SF2E/RL**
SF2RE/RL
SF3E/RL
SF4E/RL
SF6E/RL
Accessories

Max pressure
Bar

Normal media
(body in brass)

1…8“
1…8“
1…8“
1…8“
1…8“
1/2“
3/4“
1“

Type

11
11
11
30
30
11
11
11

•
•
•

NPT 1” NPT connector ttt

Aggressive media
(body in stainless steel AISI 316L)

•
•
•
•
•
•
DBZ-09 - Stainless steel Aisi 316L paddles for liquid flow switch
* models with TÜV approvaltttt

Protection

Flow rate

IP65
IP65
IP65
IP65
IP65
IP65
IP65
IP65

•
•

Technical features
Contacts:
Switch capacity:
Working:
Max temperature
Max pressure:
Fitting:
Body:
Paddles:
Housing:
Storage:
Protection:
Size:
Weight:

Body with pipe
fitting "T"

1
1
2
1
2
3
3
3

** models with TÜV approval

Wiring diagram

dust-tight microswitch with switching contacts (n.c./n.o.)
15 (8) A, 24...250 Vac
-40...+85 ºC t
10...90% r.h. (without condensing)
-40...+120 ºC
11 bar (SF2: 30 bar)
see flow rate schedule
see schedule above
stainless stee INOX AISI 316L
Base in ABS, transparent PC cover
-40...+85 °C t
< 95% r.h.
IP65, class I
140 x 62 x 65 mm
950 g

Diagram during flow presence.

Installation
The flowswitch can installed in every position far from elbows or throttlings, with arrow on
flow direction. If pipe is vertical, recalibrate range to balance paddle weight. If the device is
downwards mounted take care to slags, and apply it in a straight pipe far from filters, valves,
etc with length at least 5 times the diameter of pipe upstream and downstream the unit.

Riels Instruments Srl

+39 049 8961771

Connect to red and to white contacts of the microswitch (fig. 1). The contact red-white opens when
the flow drops below the set level. When the flow is
missing the contact red-blue closes and can be used
as a signal or alarm contact.

+39 049 717368 www.riels.it info@riels.it