Water flow control switch water pump flow sensor
Description
KWFS water flow switch is a flow switch made of composite material
housing, with a protection level of IP65, which can meet relatively
harsh operating environments, while ensuring its stability during
operation and increasing its service life, thereby reducing
customer usage costs.
The working principle is that the target type (baffle type) flow
switch is used to detect one-way or two-way flow of air, oil, and
water. There should be no entangled debris in the medium. When the
fluid flows through the pipe, the baffle deflects. By adjusting the
adjusting bolt, the single pole double throw microswitch operates
at the set flow rate and outputs a switching signal; During
bidirectional detection, the baffle offset pushes the magnetic
module upward, driving the switch module to act. Used to detect
unidirectional flow of air and water, and there should be no
entangled debris in the water. When the fluid flows through the
pipe in the indicated direction, the baffle deflects. By adjusting
the adjusting bolt, the single pole double throw microswitch
operates at the set flow rate and outputs a switching signal. Large
set flow range and convenient adjustment are widely used for
measuring water, gas, oil, and other media.
Application
Control and monitor liquid flow of boilers, pumps, etc., of
heating, cooling, and air conditioning equipment.
Features
● Flow control of water and normal media
● Renovated SPDT micro switch ensures the reliable switch function
●15(8A)250VAC switch rating
● IP65, class I enclosure
● Set point adjustable
● Stainless steel paddle
● Brass material
● Max. liquid temp 120℃
● Max working pressure 20Ba
Specifications
| Type of operation | On/Off,single-stage,micro switch |
| Output | SPDT 15(8A) 24/250VAC |
| Flow rates | See flow rate table |
| Flow rate setting adjustment | Internal screw |
| Sensing element | Paddle |
| Liquid applications | Hot, chilled, well, pool and sea water,Brine or ethylene glycol |
| Parts material in contact with fluid | Brass |
| Paddle material | Stainless steel |
| Liquid temperature | -20℃~120℃ |
| Permissible ambient temperature | -40℃~85℃ |
| Permissible ambient humidity | 10…90% RH, non-condensing |
| Cable entry | M18 Fitting |
| Housing | Fire Resistance ABS or PC |
| Protection | IP65 |
| Color | White |
| Weight | 1.0Kg |
Types of Model
| Model | Connection |
| KWFS-1 | 1/2" -14 NPT |
| KWFS-2 | 3/4" -14 NPT |
| KWFS-3 | 1" -11½ NPT |
Liquid Flow Rate Table
| Line Pipe Size(in.) | 1 | 1-¼ | 1-½ | 2 | 2-¼ | 3 | 4 | 4Z | 5 | 5Z | 6 | 6Z | 8 | 8Z |
| Min.flow | Flow Increase
①&②Connected | 4.2
(1.0) | 5.8
(1.3) | 7.5
(1.7) | 13.7
(3.1) | 17.6
(4.0) | 27.5
(6.2) | 64..7
(14.7) | 35.2
(8.0) | 125
(28.4) | 57.01
(12.9) | 190.0
(43.1) | 74.0
(16.8) | 374.7
(85.1) | 204.7
(46.5) |
Flow Decrease
①&③Connected | 2.5
(0.6) | 3.7
(0.8) | 5.0
(1.1) | 19.7
(2.2) | 11.9
(2.7) | 19
(4.3) | 50.1
(11.4) | 26.9
(6.1) | 101.1
(22.9) | 41.0
(9.3) | 158.0
(35.9) | 54.0
(12.3) | 319.7
(72.6) | 170.0
(3806) |
| Max.flow | Flow Increase
①&②Connected | 9.2
(2.1) | 13.3
(3.0) | 17.6
(4.0) | 26.9
(6.1) | 30.8
(7.0) | 50.2
(11.4) | 127.6
(29.0) | 81.0
(18.4) | 245.0
(55.6) | 118.0
(26.8) | 374.7
(85.1) | 144.0
(32.7) | 759.5
(172.5) | 415.0
(94.2) |
Flow Decrease
①&③Connected | 8.1
(2.0) | 12.5
(2.8) | 16.3
(3.7) | 25.1
(5.7) | 28.6
(6.5) | 47.1
(10.7) | 122.0
(27.7) | 76.2
(17.3) | 234.7
(53.3) | 111.0
(25.2) | 359.7
(81.7) | 134.7
(30.6) | 729.6
(165.7) | 400.6
(90.8) |
Note:
①For flow rates with suffix "Z", the 6 inch paddle must be
installed.
②The flow rate unit of the above table is GPM (m /h)
Electrical Wiring
Installation
The flow switch can be installed in every position far from elbows
or throttlings, with arrow on flow direction. If pipe is vertical,
recalibrate range to balance paddle weight. If the device is
downwards mounted, take care to slags and apply it in a straight
pipe that is far from filters,valves,etc.,with length at least 5
times the diameter of pipe upstream and downstream the unit.
Note:
The flow switch is factory calibrated at its minimum sensitivity.To
increase the set valve,turn the adjustment screw clockwise.The
cut-out valve must be ≥the minimum flow necessary to guarantee the
protection of the plant.
Dimensions (mm)
Paddles
| Install Paddle |
| Pipe | NO. |
| 1" | 1 |
| 11/4" | 1 |
| 11/2" | 1 |
| 2" | 1,2 |
| 21/2" | 1,2 |
| 3" | 1,2,3 |
| 4" | 1,2,3 |
| 4"Z | 1,2,3,4 |
| 5" | 1,2,3 |
| 5"Z | 1,2,3,4 |
| 6" | 1,2,3 |
| 6"Z | 1,2,3,4 |
| 8" | 1,2,3 |
| 8"Z | 1,2,3,4 |
