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Eletta (Beijing) Instruments Co., Ltd.

VA Flow Switches / 
Flow switch type IV

Flow switch type IV

The Flow Switch is designed to give an initial alarm at a very low flow and
still capable of allowing a high full liquid flow passing through when pumps
or valves are activated by the micro switch. This is since the Flow Switch is de-
signed with a variable flow passage area which increases as the liquid flow
rate increases. It is also equipped with an internal rubber diaphragm to make
the switch even more sensitive atlow liquid flows.

Product Introduction

  •  Rugged and sturdy design

  •  Insensitive to magnetic fields

  •  Simple and economical installation

  •  One adjustable SPDT micro switch for flow alarm

  •  Can be mounted horizontally or vertically

  •  Can be used in any liquid

  •  Function based on flow and not affected by the static line pressure

Technical specifications

  • Flow range: 0 –300 l/min

  • Min switch point: 3 l/min

  • Max. switch point: 70 l/min

  • Wetted materials: Copper alloy and stainless steel 316

  • Rubber parts: EPDM and Fluorinated rubber (FPM) as option

  • Max. pressure: 25 bar (363 PSI)

  • Process connection: DN40 (BSP 1 1/2”) standard and DN32 (BSP 11/4”) or DN25 (BSP 1”) with a reducing nipple (option)

  • Alarm: one (1) micro switch contact, adjustable to trip within the above mentioned min/max switch point