Size of Valves mm
Nominal Pressure kgf/cm
50 to 125
16
150 to 300
10
350 to 600
6
Range
Tolerance on Length
200 to 350
±12
400 to 600
±13
700 to 800
±14
900 to 1000
±15
1100 to 1300
±16
Size
50
65
80
100
125
150
200
250
300
350
400
450
500
600
Length
200
240
260
300
350
400
500
600
700
800
900
1000
1100
1300
Hinge Pin Dia, min.
10
10
10
12
12
16
20
22
25
25
32
32
38
38
Size
50
65
80
100
125
150
200
250
300
350
400
450
500
600
Size of by - pass arrangements 10 10 10 10 15 15
25
25
40
40
40
50
50
65
PN Rating
Test For
Test Pressure kgf/cm
Test Duration
PN 1.6
Body
Seat
24
16

5
2

PN 1.0
Body
Seat
15
10
5
2

PN 0.6
Body
Seat
9
6
5
2


Aarko Cast Iron non Return/Reflux valves are of single door, Swing check type for use in Waterworks of sizes 50mm to 600mm and are manufactured on a quality basis from high class material. Strict accuracy is observed backed with contant suervision gauging and testing by trained and qualified staff. Our valves from size 50mm to 300mm enjoy ISI marking, which is added 3rd party quality assurance. The valves are so designed tht in working position the valves positively close when the flow in the pipe comes to a stop. The wall thickness of the matel in all casting is maintained throughout any section as uniform as possible to avoid the stain set up by sudden changes of cross section.

1. Reflux valves are generally used on rising mains as they permit water to flow in one direction only and check all the return flows. They are operated by pressure alone, having no external means of control.

2. Reflux valves are designated by nominal pressure (PN) defined as maximum permissible gauge working pressure.

 

 

 

 

 

DIMENSIONS OF REFLUX VALVES





SIZE OF BY-PASS ARRANGEMENTS

 

 

TEST DURATION

 







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