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Introduction

Principle & Structure

Plug-in installation, mechanical flow switch. Built-in micro trigger switch.

Features

It can measure the two-way flow in the pipeline, with small pressure loss, good repeatability and anti-fouling ability. The mechanical part is safely isolated from the electronic part. There are 5 kinds of baffles in the delivery, which can be used flexibly by the user according to the site conditions when the large pipe diameter is low in flow rate or when the pipe is not full. The same switch can be used for many types of pipes.

Function

Open or close a circuit by detecting whether there is flow in the pipe. It is usually used in heating, air conditioning, refrigeration, water treatment, pressurized water supply, industrial addition and other systems. It can control the following equipment: water pump, burner, compressor, chiller, electric valve, alarm equipment, industrial addition equipment, etc. In the heating system, its role is particularly important. When the return water flow of the boiler system is too low or no flow, it can quickly turn off the burner to prevent the boiler system from drying out and overheating, and avoid frequent intervention of other temperature control components.

technical parameter

Repeatability:±2.5% of total scaleMedium temperature:0~90℃ (-30~350℃)
Wiring:Terminal wiringInterface mode:NPT1 ″
output:Mechanical switch normally openProtection class:IP67
Pressure:16bar (40bar optional)

Average pressure loss:0.08bar (maximum flow)Medium temperature:Body: 316L stainless steel
Ambient temperature:-25…80℃Material:NO Normally Open

Selection table

FB33-Two-way shutter type flow switch

Thread details
01Threaded connection: NPT1"

Connection method
MExternal thread 

Material Description
MBrass alloy construction UNI EN 12165 CW617N
KStainless steel 1.4435 (316L)

(special option) VARIO
/HPHigh pressure 40bar
The complete data of this selection table, please contact the sales staff or email to sales@kewill-auto.cn for complete samples.
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