3 replies to this topic

[Mahdi1980]

Dear friends,

 

I have a Lewa diaphragm pump which is designed for transferring a liquid Propylene mixture. Now, I have decided to apply it for handling white oil which density is 2 times greater than propylene and its viscosity is much higher than the liquid propylene ( Ro propylene =500 kg/m3 , mu of propylene =0.01 cP . Ro white oil mixture=1050 kg/m3 , mu white oil=50 cP)

Would you please advise if I can do it? if so, what are the effects of the new fluid ( white oil) on the performance and efficiency of the pump.

 

Regards

Edited by Mahdi1980, 23 May 2018 - 07:18 AM.

[Amit J]

Mahdi,

 

Basically when density & viscosity increases for operating fluid, it will have direct impact on discharge pressure, power consumption and motor rating.

 

If your head requirement is same as earlier case,

1. Discharge pressure will increase (provided motor is designed for that limit of additional load). Otherwise motor may trip on high amperage or it will trip due to heating in an attempt to generate desired additional head.

2. If motor is designed for taking additional load, its power consumption will increase.

3. If motor rating is not sufficient for desired load, you may consider an option to replace motor of higher rating.

 

If head requirement is changing than earlier case, basic concept as suggested above will remain same.

 

Also consider loop integrity of pump seal, instruments in loop, piping etc. for new density / viscosity before finalising application.

 

Hope this helps.

[breizh]

Hi Mahdi ,

Why don't you ask Leva their thought about your project  ?

https://www.lewa.com...nds/lewa-pumps/

 

good Luck

Breizh

Edited by breizh, 26 May 2018 - 02:03 AM.

[farid.k]

What amit J has explained is what will happened if you changed the with different properties. Basically load for the pump will be increased due to the change of the system pressure.

Additional to that, do concern on the material compatibility with new fluid