Kewill Global

THEORY & STRUCTURE

Plug-in installation, mechanical flow switches. The built-in micro trigger switch.

 

FETURES

Minimal pressure loss, good repeatability, dirt-resistance, through the knob to achieve accurate switch setting.hermetic separation of mechanical.At the time of delivery is accompanied by 5 baffle plates, on the large diameter pipeline with low velocity or not full,the user can flexibly use according to the actual situation.The same kind of switch can be used for various pipeline.

FUNCTIONS

●By detecting the pipeline has no flow to open or close a circuit.

●It is usually used in heating,air-conditioning,refrigeration, water treatment,water supply,industrial added system.
●Can control equipment such as: water pump,burners,compressor,cold water machine,electric valve,alarm equipment,industrial equipment and so on.In the heating system ,its role is particularly important, when the boiler system backwater flow too low or no flow, it can be quickly closed burner boiler system, prevent dry burning,over temperature, avoid the frequent involvement of other temp.control element.

 

TECHNICAL DATA 1,FOR DN≤6″

Installation DN Application of paddle number Withstand voltage Adjustable Range Hysteresis
bar L/min(H2O.air) L/min(H2O.air)
 DN25       「1″」 1 16 or 40 20…48 8
 DN32 「1 1/4″」 1 16 or 40 34…100 10
 DN40 「1 1/2″」 1 16 or 40 65…160 14
 DN50       「2″」 1 16 or 40 120…280 26
 DN65 「2 1/2″」 1 16 or 40 210…550 18
 DN80       「3″」 1 16 or 40 380…750 20
 DN50       「2″」 2 16 or 40 40…140 18
 DN65 「2 1/2″」 2 16 or 40 110…340 15
 DN80       「3″」 2 16 or 40 180…470 18
 DN100     「4″」 2 16 or 40 350…920 20
 DN80       「3″」 3 16 or 40 115…220 20
 DN100     「4″」 3 16 or 40 210…590 20
 DN125     「5″」 3 16 or 40 380…1200 40
 DN150     「6″」 3 16 or 40 550…1800 80

TECHNICAL DATA 2,FOR DN≥125mm

Interface height Application of paddle number Withstand voltage Adjustable Range Hysteresis Weight
mm bar L/min(H2O.air) L/min(H2O.air) kg
25 4 16 or 40 0.37…1.22 0.05 0.55
25 5 16 or 40 0.26…0.86 0.04 0.55
50 4 16 or 40 0.57…1.68 0.08 0.55
50 5 16 or 40 0.33…1.08 0.05 0.55

Note: The above parameters is going to switch vertically installed in the horizontal pipeline,at 20℃ water as medium .

INSTALLATION

●Corrugated tube life: 500,000 times
●Repeatability: ±2.5% of full scale
●Connection type: Terminal connection
●Output: Mechanical switch  NO+NC (250VAC,3A)
●Withstand voltage: 16 bar(40bar optional)
●Avg pressure loss: 0.08bar(Max. flow)
●Ambient temp.: -25…80℃
●Medium temp: 0…90℃ (-30…350℃)
●Interface mode: NPT1″ & G1/2Male thread & DN25 flange connection type
●Protection class: IP54&IP57
●Material: Body:   316L stainless steel
Process connection: brass alloy/316L stainless steel
Connecting rod:brass alloy/316L stainless steel
Paddle:316L Stainless steel
Seals:  NBR
Protection shell: Fire class carbonate polymer&316L stainless steel

Flange installation diagram

 

 

SUITABLE MEDIUM

INSTALLATION

WIRING

DIMENSION

SELECTED TABLE

FB30- 01 M M /HT SPECIFICATION
FB30- FB30 Series Paddle flow switch
01 Thread interface:NPT1″
02 Thread interface:G1/2
M External thread
Wetted material M Bronze alloy structure of UNI EN 12165 CW617N
K1 304 Stainless steel 1.4301(304)    liquid body
K2 316L Stainless steel 1.4435(316)   liquid body
Protection cover material P Fire class carbonate polymer protection shell
K 316L stainless steel protection shell
VARIO /HT High temp.350 ° C (for protection grade IP67)
/F Flange interface
/HP High voltage 40bar
Welding of optional

accessories

K30 Specification
NPT1″Base
A
B G1/2Base
C Shaped conn.

 

FB30 Series

Flow switch , brass (stainless steel).The baffle sheet, corrugated pipe, support and other internal components for stainless steel.Suitable medium: water, oil, air, ethylene glycol solution. Max.working pressure of 40 bar. Medium temp.-30…350 C. Power supply: 250V, 3A. Protection class IP54. interface NPT1″ &G1/2, suitable diameter 1 “-8″, the plug-in connection can provide a flange type & thread connection type.


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