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A foot valve is generally placed at the
lower end of the suction pipe of a centrifugal pump to
prevent the suction pipe from emptying while the pump is
at rest; consequently, when the pump is first started it does
not have to exhaust the air from the suction pipe with the
result that prompt starting of the pump is secured. Foot valve
is particularly useful when the suction lift or vertical
height of the pipe is considerable.
SWING TYPE
Swing type valves of sizes upto 150 mm shall have a single
disc. Sizes exceeding 150 mm shall preferably have two discs
of semi-circular type. Lift valves are recommended up to size
100 mm only.
LIFT TYPE
Lift Type Valve are recommended up to size 100 mm only. Flange
valve with Cast Iron Strainer and G.M. working parts. Hydraulically
tested to 250n l.b.s. P.S.I.
DIMENSIONS OF STRAINER HOLES
|
Nominal Size of Valve |
Max. Dia of Hole (when Circular) |
Max. Valve for Small Dimensions of
Hole (when non-circular) |
25
32 |
10
10 |
10
10 |
40
50
65
80 |
12
12
12
12 |
12
12
12
12 |
100
125
150 |
20
20
20 |
16
16
16 |
200
250 |
22
22 |
20
20 |
300
350 |
25
25 |
22
22 |
400
450 |
28
28 |
22
22 |
 
Copyright © 2002-2003
AARKO VALVES
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