SF_Flow_switch_Riels - 2 Pages

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SF_Flow_switch_Riels

Catalog excerpts

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; Tutti i dati ed i contenuti di questa scheda sono di proprietà esclusiva di Riels Instruments - heat pumps; - devices for oil monitoring; - lubrification circuits. Normal media (body in brass) Aggressive media (body in stainless steel AISI 316L) • • • • • • DBZ-09 - Stainless steel Aisi 316L paddles for liquid flow switch * models with TÜV approval Flow rate Technical features Contacts: Switch capacity: Working: Max temperature Max pressure: Fitting: Body: Paddles: Housing: Storage: Protection: Size: Weight: Body with pipe fitting "T" ** 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 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 < 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. 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.

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Note The flowswitch is factory calibrated at its min. sensitivity. To increase the set value turn clockwise the adjustment screw. The cut-out value must be >- the minimum flow necessary to guarantee the protection of the plant. The units without “T” fittings are supplied with 4 paddles, which must be cut off according to the pipe. All devices can be supplied with “T” connection on request as schedule indications. Attention If flowswitch is used as a minimum flow controller, it is necessary to add another device downstream for alarm condition activation. Tutti i dati ed i contenuti di questa...

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