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  1. Istiaque Ahmed

    Inconsistent volume flow for hot and cold liquid

    Hi LittleInch, before starting actual liquid we are testing it with water. So viscosity is not that much. But I will make the test with the filling head once again and will let you know about that.
  2. Istiaque Ahmed

    Inconsistent volume flow for hot and cold liquid

    Thanks all for your valuable comments. Now I have a better understanding of the problem. Hopefully will get a solution soon. @IRstuff, tried with lowest possible speed. But didn't get the solution. @Rputvin, you are correct pressure difference reduces the vaporization temperature, and if we...
  3. Istiaque Ahmed

    Inconsistent volume flow for hot and cold liquid

    Hi IRstuff, thanks again for your comment. The temperature is around 220 to vaporize the liquid. The piston is completely sealed and we changed all the gaskets and o-rings to see it's effect and so does the valve. We tried different types of valve like spring operated and magnetic valve rated...
  4. Istiaque Ahmed

    Inconsistent volume flow for hot and cold liquid

    Hi IRstuff, I understand your point. Our temperature is constant. When we use hot liquid, we try to keep the temperature in between 195 to 200 degree F. So density will also be the same according to the temperature. For which we could get a minor variation in weight. Say like 10 gm max. But...
  5. Istiaque Ahmed

    Inconsistent volume flow for hot and cold liquid

    Hi IRstuff, thanks for the comment. > I already mentioned the temperature range: which is room temperature to 200 degree F > Volume is measured by taking the weight of the pouch. We expect to get consistent weight. > Stroke of the servo is measured by the volume of the cylinder. For a certain...
  6. Istiaque Ahmed

    Inconsistent volume flow for hot and cold liquid

    Hi btrueblood, thank you for your suggestion. I was also thinking about cavitation. But don't know how to reduce that. I forgot to mention one point. Sometimes when we run like 20-50 cycles, after that for a while we get a consistent level like for another 10-20 cycles. So I am not sure the...
  7. Istiaque Ahmed

    Inconsistent volume flow for hot and cold liquid

    Hi, I have a liquid filling system. I am attaching a schematic diagram of the system. The system consists of a tank (we keep a constant level of liquid), a spring operated check valve, a T-junction, a piston-cylinder operated by servo motor, some hoses and a filling head (there is valve inside...

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