THEORY & STRUCTURE
Mechanical type flow switch.Built-in spring supporting baffle sheet, when the flow rate reaches a prefabricated value, the mechanical structure of microswitch trigger trigger switch.
FETURES
On line installation,Minimal pressure loss, good repeatability, dirt-resistance, through the knob to achieve accurate switch setting.hermetic separation of mechanical.
FUNCTIONS
The gas-liquid dual-purpose type, industrial automation / mechanical equipment / air compressor industrial /refrigeration and air conditioning .Applied to diameter of the pipeline ≤50mm.
TECHNICAL DATA 1,FOR DN≤6″
| DN | Interface thread | Type | Withstand voltage | Adjustable Range | Hysteresis | ||
| D | bar | L/min（Pure water） | L/min（Pure water） | ||||
| 15 | RC 1/2″ Taper pipe thread | FB31-015FM1 | 16 or 40 | 3…11 | 1.5 | ||
| RC 1/2″ Taper pipe thread | FB31-015FM2 | 16 or 40 | 5…17 | 2.5 | |||
| 20 | RC 3/4″ Taper pipe thread | FB31-020FM1 | 16 or 40 | 4.2…18 | 2 | ||
| RC 3/4″ Taper pipe thread | FB31-020FM2 | 16 or 40 | 8.3…37 | 3 | |||
| 25 | RC 1″ Taper pipe thread | FB31-025FM1 | 16 or 40 | 5.2…23 | 2 | ||
| RC 1″ Taper pipe thread | FB31-025FM2 | 16 or 40 | 11…48 | 4 | |||
| 32 | RC 1 1/4″ Taper pipe thread | FB31-032FM1 | 16 or 40 | 8.1…39 | 3 | ||
| RC 1 1/4″ Taper pipe thread | FB31-032FM2 | 16 or 40 | 19…90 | 6 | |||
| 40 | RC 1 1/2″ Taper pipe thread | FB31-040FM1 | 16 or 40 | 15…69 | 5 | ||
| RC 1 1/2″ Taper pipe thread | FB31-040FM2 | 16 or 40 | 25…111 | 7 | |||
| 50 | RC2″ Taper pipe thread | FB31-050FM1 | 16 or 40 | 35…92 | 6 | ||
| RC 2″ Taper pipe thread | FB31-050FM2 | 16 or 40 | 46…125 | 7 | |||
Note: The above parameters is going to switch vertically installed in the horizontal pipeline,at 20℃ water as medium .
The above example models material is 316L stainless steel (we have bronze material can be option)
TECHNICAL DATA
| ●Setting range: | See bellow table | |||
| ●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℃) | |||
| ●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
INSTALLATION
Note: installation position may
influence switch value.
SUITABLE MEDIUM
WIRING
DIMENSION
DIMENSION
| FB31- | 015 | F | M | 1 | /F | SPECIFICATION | ||
| FB31- | FB31 Series Paddle flow switch | |||||||
| DN applicable | 015 | RC 1/2″ Taper pipe thread (DN15) | ||||||
| 020 | RC 3/4″ Taper pipe thread(DN20) | |||||||
| 025 | RC 1″ Taper pipe thread(DN25) | |||||||
| 032 | RC 1 1/4″ Taper pipe thread(DN32) | |||||||
| 040 | RC 1 1/2″ Taper pipe thread (DN40) | |||||||
| 050 | RC2″ Taper pipe thread(DN50) | |||||||
| A | Customer specified diameter size | |||||||
| Connection type | F | Internal thread | ||||||
| M | External thread | |||||||
| Material | M | Brass alloy structure UNI EN 12165 CW617N | ||||||
| K1 | 304 Stainless steel 1.4301 liquid body | |||||||
| K2 | 316L Stainless steel 1.4435 liquid body | |||||||
| Detail data | 1 | See technical data with diameter appropriate to the range of adjustment range | ||||||
| 2 | See technical data with diameter appropriate to the range of adjustment range | |||||||
| Protection cover material | P | Fire class carbonate polymer protection shell | ||||||
| K | 316L stainless steel protection shell | |||||||
| VARRIO | /F | Special connection type：flange connection |
| /HP | High voltage 40bar | |
| /HT | Withstand high temerature 350 degree(IP67) |
FB31 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. Suitable diameter DN15~DN50.