Waterflow Alarm Switch
Installation and Operation Instruction
2
supply@bernofire.com
www.bernofire.com
CAUTION
Hole must be drilled perpendicular to the pipe and vertically centered. Refer to the
Compatible Pipe/Installation Requirements chart for size.
Correct
Incorrect
Nominal
Dimension
Size
Dimension
DN
Inch
mm
R
A
B
C
D
E
Hole Dia
50
2”
60.3
30.15
116
100
59.5
140
79.5
32
65
2 ½”
73
36.6
120
100
59.5
140
79.5
32
80
3
88.9
44.45
145
100
59.5
140
80.9
51
100
4
114.3
57.15
185
100
59.5
140
98.5
51
125
5
139.7
69.8
212
100
59.5
140
82.6
51
150
6
165.1
82.55
254
100
59.5
140
90.4
51
200
8
219.1
109.55
298
100
59.5
140
90.5
51
2-
No.
Part
Material
1
Cover
ASTM B85-96 383.0E
2
Rubber Gasket
EPDM
3
Spring
SS304
4
Air Delay Device
PC GV3410R
5
Stem Sealing Gasket
SS304+NBR
6
Connecting Rod
POM 500P
7
Micro-Switch
PC GV3410R
8
Connection Plate
ASTM B85-96 383.0E
9
Connection Plate Seal
NBR
10
Saddle
ASTM A536,65-45-12
11
Vane
PTFE
12
U-Bolts
Carbon Steel Zinc Plated
13
Nuts
Carbon Steel Zinc Plated
Hole Dia
WARNING
Remove all the materials in the pipe, otherwise, the pipe can be blocked.
Parts Description
Electrical Conduit
Entrance
U-Bolt Nut
Saddle Gasket
Roll Paddle
Pipe Paddle
Mounting Plate
Pipe
U-bolt
Water Flow
Co
ver
Tamper proof wrench
Part
Material Specifications
3-
a) Hole Cutting
Hole Cutting Size mentioned in above table.
Installation
