Gate Valve
Gate Valves function is to isolate or sectionalize any piece of equipment or length of pipeline in water or sewage systems.
It is normal practice, therefore, to use them on a suction and delivery branches of pumps at regular intervals along a pipeline, at branches underneath air valves, on bye-passes, on drains or washouts etc.
They have a low head loss coefficient, hence are ideal on pump installations to maximize system efficiency.
Technical Information
Maximum Unbalanced Head for Manual Operation of inside screw gate valves
Valve Bore (mm) | Headwheel Dia (mm) | Unbalanced Head (m) | ||
Handwheel Operation | Tee Key Operation | |||
80 | 200 | 140 | 160 | 160 |
100 | 250 | 105 | 160 | 160 |
150 | 250 | 105 | 160 | 160 |
200 | 300 | 40 | 73 | 140 |
250 | 400 | 40 | 50 | 93 |
300 | 400 | 30 | 35 | 65 |
350 | 533 | 12 | 17 | |
400 | 610 | 10 | 13 | |
450 | 686 | 8 | 10 | |
500 | 686 | 7 | 8 | |
600 | 762 | 3 | 3 |
- . Max input effort is 50kg ( 25kg Push/Pull )
- Tee Key has 0.7m arm (0.6m effective length )
- For greater unbalanced head it is necessary to use a bypass or fit totally enclosed units having integral ball bearing collar.
