|
The Extra Deepwell Handpump has counter weights attached to the Handle to assist in the movement of the handle since the water is lifted from very a great depth (upto 90 meters). The number of counter weights depends upon the exact depth at which cylinder is placed.
For e.g. from 50-60 meters : 0 weights, from 60 -70 meters :1 weight, from 70-80 meters : 2 weights and from 80-90 metrs : 3 weights.
These pumps are exclusively used for extracting water from greater depths. They are suitable for static water levels varying between 50 and 90 meters where placement of cylinders can be upto 85 meters. The inner diameter of the borewell, where these pumps are installed, should not be less than 100 mm. These handpumps are being manufactured as BIS specifications BIS 13287 : 1992
While most of the components are similar to the India Mark II Pump, the head assembly is slightly different, the Handle is thicker - made of 40 mm Square instead of the 32 mm square in mark II or III pumps and the cylinder assembly is different and is a combination of the mark II and mark III components
|
