Serie FFlussostato a paletta resistente alla corrosione

Interruttore a paletta robusto e molto sensibile per liquidi sia caldi sia freddi. Il trascinamento a repulsione magnetica (senza guarnizioni, membrane o soffietti) offre un interruttore per alte pressioni senza punti di possibile guasto. Attacco al processo in polipropilene o acciaio inox 316; 3/4" o 1" BSP/NPT.

Caratteristiche

Interruttore S.P.D.T. 5–500 V AC, 15 A (modello F-H)
Disponibile il modello 'L' a bassa tensione con contatti dorati (F-L)
Modelli in polipropilene o acciaio inox 316
Interruttori disponibili con filettature da 3/4" e 1" BSP e NPT
Forzatura manuale integrata (modelli F-H e F-L)
Costruzione modulare — si può rimuovere l’involucro, o svitare l’interruttore dalla tubazione, senza toccare il cablaggio
Modelli ad alta pressione da 400 bar / 5800 psi disponibili (acciaio inox)
Trascinamento magnetico senza guarnizioni
Custodia IP67 resistente agli agenti atmosferici
Facile da sottoporre a manutenzione

La custodia elettrica è un gruppo separato che si blocca sulla parte idraulica con una sola vite accessibile dall’esterno, così può essere rimossa per la manutenzione — oppure l’interruttore può essere svitato dalle tubazioni — senza intervenire sul cablaggio. Ogni interruttore della Serie F è fornito con una paletta in polipropilene rinforzato con fibra di vetro che può essere tagliata e sagomata per tubazioni da 25 mm (1") e più grandi. Un comando manuale integrato attiva l’unità con la pressione di un pulsante, indipendentemente dal flusso, così le pompe possono essere avviate manualmente in qualsiasi momento e collaudo e messa in servizio risultano semplici. Disponibile con attacco al processo in polipropilene o in acciaio inox 316 per alte pressioni, con modelli adatti alla maggior parte delle applicazioni, tra cui acqua di mare, acqua di pozzo, acidi, alcali e molte soluzioni chimiche.

Ulteriori informazioni

Le schede tecniche localizzate non sono ancora disponibili per questo prodotto nella lingua selezionata. I link qui sotto aprono la versione in inglese.

Scheda tecnica Serie F
Istruzioni di installazione Serie F-H
Istruzioni di installazione Serie F-L (bassa tensione)
Montaggio su un distanziale? Verifica del distanziale
Modelli CAD 3D (6 modelli, STEP)
Modelli esterni semplificati per layout e montaggio; non per la fabbricazione.
- F-H-25B8.6 MB
- F-H-25B-SS7.2 MB
- F-H-25N8.3 MB
- F-L-25B8.6 MB
- F-L-25B-SS7.2 MB
- F-L-25N8.3 MB

Come reagisce al flusso la paletta della Serie F

Caricamento del modello 3D…

Ordini — modelli disponibili

Codice modello	Descrizione
F-H-25B	Standard heavy-duty S.P.D.T. switch (H), 1" BSP thread, all polypropylene wetted parts
F-H-25N	Standard heavy-duty S.P.D.T. switch (H), 1" NPT thread, all polypropylene wetted parts
F-H-25B-SS	Standard heavy-duty S.P.D.T. switch (H), 1" BSP thread, high-pressure 316 stainless steel process connection + polypropylene paddle
F-H-25N-SS	Standard heavy-duty S.P.D.T. switch (H), 1" NPT thread, high-pressure 316 stainless steel process connection + polypropylene paddle
F-H-20B-SS	Standard heavy-duty S.P.D.T. switch (H), 3/4" BSP thread, high-pressure 316 stainless steel process connection + polypropylene paddle (3/4" is stainless only; no polypropylene 20 mm option)
F-H-20N-SS	Standard heavy-duty S.P.D.T. switch (H), 3/4" NPT thread, high-pressure 316 stainless steel process connection + polypropylene paddle (3/4" is stainless only; no polypropylene 20 mm option)
F-L-25B	Low-voltage gold-contact model (L) — S.P.D.T. switch with gold contacts, 1" BSP thread, all polypropylene wetted parts
F-L-25N	Low-voltage gold-contact model (L) — S.P.D.T. switch with gold contacts, 1" NPT thread, all polypropylene wetted parts
F-L-25B-SS	Low-voltage gold-contact model (L) — S.P.D.T. switch with gold contacts, 1" BSP thread, high-pressure 316 stainless steel process connection + polypropylene paddle
F-L-25N-SS	Low-voltage gold-contact model (L) — S.P.D.T. switch with gold contacts, 1" NPT thread, high-pressure 316 stainless steel process connection + polypropylene paddle
F-L-20B-SS	Low-voltage gold-contact model (L) — S.P.D.T. switch with gold contacts, 3/4" BSP thread, high-pressure 316 stainless steel process connection + polypropylene paddle (3/4" is stainless only; no polypropylene 20 mm option)
F-L-20N-SS	Low-voltage gold-contact model (L) — S.P.D.T. switch with gold contacts, 3/4" NPT thread, high-pressure 316 stainless steel process connection + polypropylene paddle (3/4" is stainless only; no polypropylene 20 mm option)

Limiti di funzionamento

Maximum operating pressure (all-polypropylene model, ambient)	18 bar / 261 psi (de-rate linearly with temperature — at 60 °C / 140 °F the maximum permissible pressure does not exceed 1 bar / 15 psi absolute)
Maximum operating pressure (stainless steel model, ambient)	400 bar / 5800 psi
Minimum burst pressure (all-polypropylene)	45 bar / 652 psi
Minimum burst pressure (stainless steel)	500 bar / 7215 psi
Maximum operating temperature (all-polypropylene)	60 °C / 140 °F (see pressure de-rating note)
Maximum operating temperature (stainless steel)	80 °C / 176 °F
Minimum operating temperature (both models)	-20 °C / -4 °F
Ingress protection rating	IP67

Dati elettrici

F-H switch type	S.P.D.T. (single pole, double throw) microswitch for general control circuits up to 500 V AC — use at any voltage from 5 to 500 V AC (minimum load 160 mA at 5 V DC). Absolute limits: 500 V AC maximum; 15 A maximum (10 A at 500 V AC). Maximum voltage and maximum current cannot be applied together.
F-H typical applications	Pump starters, relay logic, contactors and timers
F-H resistive load rating (NC / NO)	15 A at 125 V AC and 250 V AC; 10 A at 500 V AC; 15 A at 8 V DC and 14 V DC; 6 A at 30 V DC; 0.5 A at 125 V DC; 0.25 A at 250 V DC
F-H lamp load rating (NC / NO)	3 A / 1.5 A at 125 V AC; 2.5 A / 1.25 A at 250 V AC; 1.5 A / 0.75 A at 500 V AC; 3 A / 1.5 A at 8, 14 and 30 V DC; 0.5 A / 0.5 A at 125 V DC; 0.25 A / 0.25 A at 250 V DC
F-H inductive load rating (NC / NO)	15 A at 125 V AC and 250 V AC; 6 A at 500 V AC; 15 A at 8 V DC; 10 A at 14 V DC; 5 A at 30 V DC; 0.05 A at 125 V DC; 0.03 A at 250 V DC
F-H motor load rating (NC / NO)	5 A / 2.5 A at 125 V AC; 3 A / 1.5 A at 250 V AC; 1.5 A / 0.75 A at 500 V AC; 5 A / 2.5 A at 8, 14 and 30 V DC; 0.05 A / 0.05 A at 125 V DC; 0.03 A / 0.03 A at 250 V DC
F-H direct motor control	Directly switches pump motors up to 1/4 HP (approx. 185 W) at 240 V AC. For larger motors use a contactor or relay.
F-RL (retired) switch type	Dry-contact reed switch S.P.D.T. break-before-make — 20 W / VA max, 140 V AC / 150 V DC, 1 A max, 200 V breakdown
F-RL (retired) typical applications	PLC input, telemetry signaling, low-voltage relay logic
F-L switch type	Gold contact microswitch, S.P.D.T., gold alloy contacts, so it switches reliably at the low wetting currents of PLC inputs, telemetry and relay logic. Not suitable for inductive or capacitive loads such as contactors and relays. Loads above the rating will damage the switch.
F-L rated current (resistive)	0.1 A at 125 VAC; 0.1 A at 8, 14 and 30 VDC
F-L inrush current	0.1 A maximum (NC and NO)
F-L minimum applicable load	1 mA at 5 VDC
F-L operating range (micro load)	5 to 30 V, 5 to 800 mW (26 mA maximum at 30 V)
F-L contact resistance	50 mΩ maximum (initial)
F-L typical applications	PLC, telemetry and low voltage control

Dimensioni

Manual Override (F-H and F-L models)

All F-H and F-L models include a red manual override button on the side of the housing, under the cable gland. Pressing the button switches the flow switch on regardless of flow — useful for manually starting pumps in spite of an initial lack of flow, and for testing/commissioning of control circuits. After wiring, press it to test: the switch changes state as if liquid were pushing the paddle.

Flow Sensitivity & Paddle Trimming

The flow rate needed to actuate the F Series depends on many variables — turbulence, liquid viscosity and the exact area of the paddle face exposed to flow. Trim the paddle with a hacksaw or tin snips so it clears the pipe wall by at least 4 mm all round. As a guide: low flow — paddle just clears the bottom of the pipe; unknown flow — 3/4 of the way across the pipe; high flow — 1/4 to 1/2 of the way across the pipe. Spare paddles are available if too much is cut off. For an accurate estimate of switch performance and to determine the effect of paddle trimming, use the online Paddle Calculator — enter your pipe inside diameter, flow rate and liquid.

Open the Paddle Calculator →

Sensitivity Adjustment

F-H and F-L switches are supplied at maximum sensitivity (adjuster wound fully in). To decrease sensitivity, remove the red dust cap and wind the adjusting screw out (anticlockwise) with a wide flat screwdriver. The further out the screw, the more flow is needed to operate the switch. Refit the dust cap.

Mounting

The switch can go in suction or delivery pipework, horizontal or vertical. In vertical pipe the flow must be upward. Do not mount on the underside of horizontal pipe. Where possible, mount the switch away from pumps, valves and bends — a fitting directly upstream makes the flow uneven and turbulent at the paddle, which can shift the switching point slightly or make the paddle flutter near the switching point; downstream fittings have little effect. Mount in a pipe tee, tapping saddle or weld-on socket, square to the flow so liquid hits the flat face of the paddle, with the arrow on the switch pointing in the direction of flow. Seal the thread with PTFE tape or thread sealant, leaving at least 4 mm of thread above the socket, and tighten with a spanner on the spanner flats only — never twist the switch body.

Electrical Installation

The F Series is a mains voltage device — all electrical work must be carried out by a licensed electrician. Terminals are marked C (common), NO (normally open) and NC (normally closed); for a two-wire connection use C plus either NO or NC to suit the application. After wiring, fully tighten the cable gland nut, check the lid gasket is in place and tighten the lid down. Without its lid the switch is not water, weather or insect proof and presents a shock hazard.

Hazardous Areas

The F-H is not certified for use in hazardous areas and must not be installed in any area classified as hazardous under AS/NZS 60079.10 (Zone 0, 1, 2, 20, 21 or 22). The F-L is simple apparatus under AS/NZS 60079.11 and may be used in a hazardous area only as part of an intrinsically safe circuit, connected through suitably certified associated apparatus. It is not Ex certified in its own right. The associated apparatus must not exceed Uo ≤ 30 V, Io ≤ 100 mA. The full conditions of use are given in the installation sheet.

F-L — Inductive and Capacitive Loads NOT Suitable

The F-L is not suitable for inductive or capacitive loads such as contactors and relays. Loads above the rating will damage the switch.

Reed Switch — Inductive Loads NOT Suitable

The F-RL reed switch must NOT be used with inductive loads such as contactors or high-wattage relays. Use the F-H model or interpose a relay/contactor for such applications.

Materials & Chemical Compatibility

All-polypropylene models (no suffix) have polypropylene wetted parts. The -SS models have a high-pressure 316 stainless steel process connection and a polypropylene paddle. The paddle on every F Series model is glass-fibre-reinforced polypropylene. Check that the switch materials suit the liquid being monitored.

20 mm models stainless only

20 mm (3/4") fittings are only available with the 316 stainless steel process connection — not available in all-polypropylene.

Approved Standards

The 'H' and 'L' microswitches used in the F Series are approved to UL1054 (File E41515), CSA C22.2 No.55 (File LR21642) and EN61058-1, and are CE marked.

Manutenibilità

Completamente riparabile sul campo. Una sola vite accessibile dall’esterno stacca la custodia elettrica dalla parte idraulica — rimuoverla per la manutenzione, oppure svitare l’interruttore dalle tubazioni, senza intervenire sul cablaggio. Palette, guarnizioni e interruttori di ricambio sono disponibili presso Kelco Engineering o il Suo distributore.

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