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Hi Binaya,

There may be two reasons for your hydram not able to lift water in Fall / Lift ratio of 6/26 :

(a) Volume of driving water required to operate 2''/1'' Hydram is 75 to 150 Liter per minute(LPM); whereas in your case supply inflow is 30 LPM only .

(b) I feel most likely air is also entering your drive pipe with water or there may be some leakages in your drive pipe.

I have following suggestions to overcome your problem:

(a) You should install two 1''/ 0.5'' Hydram in parallel or in tandem instead of one 2''/1'' Hydram. Operate initially one 1''/ 0.5''Hydram and when sufficient quantity of supply inflow is available then use the second 1''/ 0.5''Hydram simultaneously.

(b) Drive pipe should be free of any leakages in their joints.

(c) Drive pipe end should be one feet below water level in the feeding tank so that only water enters the drive pipe.

If you take above mentioned remedial measures then with fall of 6 meter you will be able lift water to 26 meter easily.

With warm regards

Col Binay Kumar(Retd)

Prakriti Biotech Farm, Hazaribag, India

www.prakriti-farms.org