Indicating Type Flow Switches
General
MTD make indicating type,
magnetically actuated flow switches are designed for positive
detection of fluid flow through your equipment. These are suitable
for water, kerosene, lubricating oils of low viscosity etc. These
are available in 6 sizes, i.e.1/4”,3/8", 1/2", 3/4",
1" and 11/4" BSP. Suitable size may be selected from
actual flow rate. Flow range covered is from 1 to 150 LPM. Fluid
Flow in the System is seen through transparent tube.
Construction
The clearance between the float
and inner surface of the transparent tube are large enough to let
floating particles to pass through, eliminating the chances of
clogging. This also reduces the pressure drop across the switch. All
switches are strong and lightweight. Adequate magnetic shielding is
provided as an in-built feature, enabling the user to mount the
switch in any location. Usually epoxy powder coated body in brown
colour is provided.
Technical Specifications
| Max. System Pressure |
2 10 Kg / cm (150 psi) |
| Temperature Range |
80C to 1200C. |
| Electrical |
Hermetically sealed reed switch, 80AT type
500mm long two core wire. |
| Contact Rating |
‘NO’ type contact rated for 1
amp 230 Vac (resistive). |
| [Please take care of surge
currents to avoid damage of Reed switch element. In such
cases please apply R.C. Network (Resistor & Capacitor)]. |
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Mounting Instructions
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Dimensions and Features
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Models Available
| Model No. |
T B S P |
A |
B |
O |
H |
W |
C |
Standard flow Ranges
Covered in LPM |
| WFS -06 |
1/4” |
95 |
32 |
5.5 |
108 |
44 |
42.5 |
0.5-1, 1-2, 2-4 |
| WFS -10 |
3/8” |
127 |
44 |
6.5 |
141 |
62.5 |
48.6 |
1-2, 2-4, 3-6, 4-8 |
| WFS -15 |
½” |
163 |
46 |
6.5 |
177 |
70 |
61.5 |
2-4, 3-6, 5-10, 8-16, 10-20 |
| WFS -20 |
3/4” |
171 |
56 |
6.5 |
189 |
76 |
69 |
10-20, 15-30, 20-40, 25-50 |
| WFS -25 |
1” |
171 |
56 |
6.5 |
189 |
76 |
69 |
10-20, 15-30, 20-40, 25-50 |
| WFS -30 |
1 1 / ” |
193 |
60 |
8.5 |
212 |
82 |
77 |
40-80, 50-100, 75-150 |
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Precautions
| Do not use excessive forces
while fixing nozzles/ couplings. Use thread sealing for
leak-tight joints. Do not hold switch in vice or wrench. |
| Do not exceed
electrical rating of the read switch. Use auxiliary relay or
contactor for higher current rating and extra number of
contacts. |
| Do not exceed
normal pressure rating of the switch for standard models.
Consult manufacturer for higher system pressure. |
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Ordering Information
| Example |
Basic Model |
Line Size(10) |
M.O.C. of Wetted Parts
(B) |
SWITCH TYPE |
LED INDICATOR |
| WFS |
WFS -
10 B 1 I |
| 06 1/4”BSP |
10 3/8”BSP |
15 1/2”BSP |
| 20 3/4”BSP |
25
1”BSP |
30
1 1/4”BSP |
|
S
STAINLESS STEEL B BRASS |
1 SPST 2
SPDT |
I LED
INDICATOR*
* - For LED Indicator Current rating should be specified
with order. |
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