Indicating Type Air 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.

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)].




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

Indicating Type Air Flow Switches, Process Control Equipment, Process Control Instruments, Thane, India
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.

Ordering Information

Example

Basic Model

Line Size(10)

M.O.C. of Wetted Parts (B)

SWITCH TYPE

LED INDICATOR

WFS

WFS -
10 B 1

06 
1/4”BSP

10 3/8”BSP

15   1/2”BSP

20  
3/4”BSP

25   
1”BSP

30 
1 1/4”BSP

SSTAINLESS STEEL   BBRASS  

1SPST   2SPDT 

I    LED INDICATOR*  

* - For LED Indicator Current rating should be specified with order.