Série C15Chave de fluxo em linha

Chave de fluxo versátil, acionada magneticamente e normalmente desligada, em corpo de latão de peça única. Liga em resposta ao fluxo. Ideal para aplicações com líquidos limpos, incluindo pressurização e o controle de bombas ou ventiladores por meio de relé, contator ou CLP — em água doce, água do mar e diesel.

Série C15

Recursos

  • Corpo de latão em peça única
  • Montagem em qualquer posição
  • Modelo adequado para diesel disponível
  • Contatos secos de reed switch
  • Detecta vazões muito baixas: liga com 0,15 L/min (vertical, retentor não magnético)
  • Projeto de baixa perda de carga
  • Totalmente sujeito a manutenção
  • À prova de intempéries

A série C15 consiste em um módulo de comutação elétrica selado montado sobre um corpo metálico de peça única. O módulo elétrico autônomo é facilmente removido sem desmontar a tubulação e pode ser invertido ou girado independentemente do corpo. Dentro do corpo metálico, um pistão de encaixe livre em suspensão magnética aciona a chave assim que o fluxo começa. O C15 é fornecido com contatos secos de reed switch para controle por relé ou CLP. Tolera pressões estáticas ou dinâmicas até 100 bar (1450 psi) com fator de segurança de 4:1.

Selecionar modelo

Pedido — Modelos disponíveis

ModeloDescrição
C15-BDry reed switch S.P.S.T. N.O. — 50 W/VA, 250 VAC / 200 VDC, 1.5 A max. Suitable for PLC, telemetry and logic circuits.
C15-B-DDiesel-suited dry reed switch S.P.S.T. N.O. — 50 W/VA, 250 VAC / 200 VDC, 1.5 A max. Suitable for PLC, telemetry and logic circuits.

Limites de operação

Switching point on rising flow (horizontal or vertical, magnetic retainer fitted)0.35 L/min (water at ambient)
Switching point on falling flow (horizontal or vertical, magnetic retainer fitted)0.30 L/min (water at ambient)
Switching point on rising flow (vertical, flow upward, non-magnetic retainer fitted)0.15 L/min (water at ambient)
Switching point on falling flow (vertical, flow upward, non-magnetic retainer fitted)0.10 L/min (water at ambient)
Maximum recommended flow rate through switch30 L/min
Maximum operating pressure (static or dynamic)100 bar / 1450 psi
Operating temperature rangeHot or cold liquids from −20 °C up to 90 °C; can be steam-sterilised at 100 °C for short periods
Ingress protection ratingIP56

Dados elétricos

Module typeDry-contact reed switch (electrical module B)
Contact configurationS.P.S.T. normally open
Switched power (maximum)50 W/VA
Switched voltage (maximum)250 VAC / 200 VDC
Switched current, resistive AC RMS (maximum)1.5 A
Inductive loads (power factor 0.4)Not suitable
Typical applicationPLC, telemetry and relay logic circuits
Temperature de-ratingThe C15-B modules do not require de-rating at elevated temperatures

Dimensões

Dimensões Série C15
Multi-view overall dimensions in millimetres — 108 mm body length, 41 mm A/F brass hex, 1/2" BSPT male inlet (15 BSPT), 3/4" BSPT female outlet (20 BSPT), 8.5 mm cable gland.

Switching-Point Sensitivity

Switching point and sensitivity to flow depend on orientation, liquid velocity, viscosity and piston clearance. A non-magnetic piston retainer is supplied. With the switch mounted vertically and flow passing upward, the non-magnetic retainer halves the switch-on flow rate — i.e. makes the switch approximately twice as sensitive. Switching points are for water at ambient temperature; decreasing the fluid viscosity proportionally increases the switch-on flow rate.

Hazardous Areas

The C15-B and C15-B-D are 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. They are not Ex certified in their own right. The full conditions of use are given in the installation sheet.

Compatible Liquids

Suits many clean liquids, including fresh water, sea water and diesel fuel. Increasing fluid viscosity decreases the flow rate required to actuate the switch. The switch can only be used with liquids free from suspended solids and free from particulates attracted to magnets.

Elevated Temperatures

Suitable for hot or cold liquids up to 90 °C, and systems can be steam sterilised at 100 °C for short periods without damaging the switch. The C15-B reed-switch modules do not require de-rating at elevated temperatures.

Installation

Install in any location in vertical or horizontal pipes; in vertical pipes flow can be upward or downward with very little difference in flow sensitivity. Where possible, fit a union on the inlet and outlet for easy removal for cleaning and servicing. The male threaded end of the switch is the inlet. Make sure no thread tape or other foreign matter enters the switch, and always fit a Y-strainer in the inlet pipe directly before the switch where scale or other material may be present. The electrical module can be removed (undo the 4 self-tapping screws) so the body can be screwed into tight locations, for example the discharge port of a pump.

Check Valves

Many applications benefit from a non-return valve in the pipework directly before the switch. The flow switch is not designed to operate as a one-way valve, and rapid or high pressure flow reversal, such as water hammer, can damage its piston.

Electrical Safety

The C15 Series flow switch is a mains voltage device. All electrical work must be performed by a fully qualified and licensed electrician and conform to AS/NZS (or equivalent) standards and local wiring rules. After installing or servicing, always replace the lid, fully tighten the lid screw and ensure the cable gland is fully tightened. Without its lid the switch is not weather or insect proof and presents a potential shock hazard.

Manutenção

Totalmente sujeito a manutenção em campo. O módulo elétrico é facilmente removido sem desmontar a tubulação (solte os 4 parafusos autoatarraxantes que prendem as duas metades do módulo) e pode ser girado ou invertido independentemente do corpo; inverter o módulo não inverte a ação da chave. Recoloque com os 4 parafusos autoatarraxantes de inox e não coloque graxa, cola nem material de enchimento entre o módulo e o corpo. Módulos e kits de vedação de reposição disponíveis na Kelco Engineering ou no seu distribuidor.

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