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FB31 Series Shutter Type Flow Switch

FB31 Series Shutter Type Flow Switch
FB31 Series Shutter Type Flow Switch
FB31 Series Shutter Type Flow Switch

Introduction

Principle & Structure

Mechanical flow switch. The built-in spring-supported baffle, when the flow reaches the preset value, the mechanical structure triggers the micro-trigger switch.

Features

In-line installation, minimal pressure loss, good repeatability, anti-fouling ability, and precise switch setting through the knob. The mechanical part is safely isolated from the electronic part.

application

Gas-liquid dual-use type, industrial automation/mechanical equipment/air compression industry/refrigeration and air-conditioning is suitable for pipes with a diameter of ≤50mm.

Performance overview

Flow switch, brass (stainless steel) body. Internal components such as baffles, bellows, and support frames are stainless steel. Applicable medium: water, glycol solution, oil, air. Maximum working pressure 40 bar. Medium temperature -30…350℃. Power supply: 250V, 3A. Protection level IP54. Applicable pipe diameter DN15~DN50

technical parameter

Predetermined area:See the table below for detailsProtection class:IP54
Repeatability:±2.5% of total scaleMain material:316L stainless steel
Wiring:Terminal wiringProcess connection:Brass Alloy & 316L Stainless Steel
output:Mechanical switch normally open + normally closed (24VDC, 15A/250VAC, 15A/380VAC, 5A)Connecting rod:Brass Alloy & 3161L Stainless Steel
Pressure:16 bar (40 bar optional)File:316L stainless steel
Average pressure loss:0.08bar (maximum flow)seal:NBR
Ambient temperature:-25…80℃Protective case:Fire Grade Carbonated Polymer & 316L Stainless Steel
Medium temperature:0…90℃ (-30…350℃)


Pipe diameterInterface threadmodelPressure resistanceAdjustable rangeHysteresisweight
DNDbarL/min (pure water)L/min (pure water)kg
15RC 1/2″ Tapered Pipe ThreadFB31-015FM116 or 403…111.50.85
RC 1/2″ Tapered Pipe ThreadFB31-015FM25…172.5
20RC 3/4″ Tapered Pipe ThreadFB31-020FM14.2…182
RC 3/4″ Tapered Pipe ThreadFB31-020FM28.3…373
25RC 1″ Taper Pipe ThreadFB31-025FM15…232
RC 1″ Taper Pipe ThreadFB31-025FM211…484
32RC 1 1/4″ Tapered Pipe ThreadFB31-032FM18.1…3931.1
RC 1 1/4″ Tapered Pipe ThreadFB31-032FM219…906
40RC 1 1/2″ Tapered Pipe ThreadFB31-040FM115…695
RC 1 1/2″ Tapered Pipe ThreadFB31-040FM225…1117
50RC2″ Taper Pipe ThreadFB31-050FM135…9261.25
RC 2″ Taper Pipe ThreadFB31-050FM246…1257


Note: The above parameters are obtained by installing the switch vertically in a horizontal pipeline and testing with 20°C water as the medium. The switch material of the above model example is 316L stainless steel (and bronze material is optional)

Selection table

FB31-Baffle flow switch

Applicable pipe diameter
015RC 1/2" Tapered Pipe Thread (DN15)
020RC 3/4" Tapered Pipe Thread (DN20)
025RC 1" Tapered Pipe Thread (DN25)
032RC 1 1/4" Tapered Pipe Thread (DN32)
040RC 1 1/2" Tapered Pipe Thread (DN40)
050RC2" Tapered Pipe Thread (DN50)
ACustomer-specified pipe diameter

Connection method
Finternal thread
MExternal thread 

Material Description
MBrass alloy construction UNI EN 12165 CW617N
K1Stainless steel 1.4301(304) Liquid body
K2Stainless steel 1.4435 (316L) liquid body

specification
1For details, please refer to the adjustment range of the range suitable for the pipe diameter in the parameter table 1.
2For details, please refer to the adjustment range of the range suitable for the pipe diameter in the parameter table 1.

Protective cover material
PFire-grade carbonated polymer enclosure (IP54)
ADie-cast aluminum enclosure (IP67)
K316L stainless steel enclosure (IP54)


(special option) VARIO
/FSpecial connection method: flange connection
/HPHigh pressure 25bar 
/HTHigh temperature resistance 350°C (protection level of this option is IP67)
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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