Oily water Casing & Impeller Material

[Proc84]

kindly advice for the best material shall be used for casing and impeller of oily water pumps

if available any data sheet for any supplier for reference will be helpful

kindest Regards

 

[Artisi]

Sorry, but is this a trick question?

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[GPRnD]

Refer to API 610 (ISO 13709) Annex G for guidance on this.

Assuming your water is not corrosive, they recommend S-3, S-6 or C-6

My personal recommendation for long life would be C-6

 

[patprimmer]

Stainless steel can be very good. It stays nice and shiny and resists corrosion.

So can carbon fibre composite. It is very light and the black fibre woven look is very fashionable

Titanium is also very nice.

Brass looks great if you keep it polished.

Polypropylee looks cheap and plasticy.

Regards
Pat
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[Artisi]

Pat,
Think that might go over like a pregnant pole-vaulter.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[patprimmer]

I just try to answer the questions the OPs actually ask. It's not my fault if they can't or don't post a clear and concise question. ;-)

Regards
Pat
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[louismouza]

Patprimmer,
Do you know suitable composite for the above application?

 

[Pumpsonly]

louismouza

With your type of general question, you are not going to any better answer than what Patprimmer has given. Oily water is not corrosive. Any composite will do the job. But to know if the type of pump you are looking for is available in such material you need to provide details of the application such as flow rate, diff head, type of pump,( dry well, wet well)etc.

 

[patprimmer]

nobody knows a suitable composite for the above application as to many parameters are missing, like:-

Expected production numbers?

Temperature of the water?

ph of the water?

Physical loads applied to the parts?

Potential heat transfer from the motor to the pump?

Possibilities of water also containing abrasives or debris?

Load on the parts?

Approximate design details of the pump?

Is light weight important?

What life expectancy is there?

Will it be exposed to UV light?

How much does cost limit the choices for other properties?

How tight a tolerance is required for he parts?

Does the tolerance need to be held over an extended time period?

Will it constantly be wet or will it be used occasionally then left in a dry environment for an extended period of time?

If the numbers are high enough for injection moulding to be viable and the ph is not to low, I would think probably GF nylon due to overall strength and toughness. It is used for virtually all automotive radiator header tanks, is used for all plastic inlet manifolds and valve covers and timing chain tensioners. It is also used for some automotive water pumps and some top end power tool housings and pumps used in underground mining.

If ph is low, GF PET. It is more rigid than nylon and better at low ph, but poor to hot water.

If it is more cost sensitive but can be bulkier or have lower life or is lightly loaded GF PP might be OK.

If it is low volume, probably fibre glass reinforced polyester is OK.

There are a great many assumptions in the above answer. All of them may very well be wrong and if so, I just wasted my time composing it and you wasted your time reading it.

The OP just plain did not ask an answerable question. My nonsense first answer I thought was an obvious indicator to that which had just enough sting to maybe be remembered and therefore motivate him to do better next time he attempts to draft a question.

Regards
Pat
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[Artisi]

And what is wrong with good old cast-iron? Pumps have been built from this material for over 100 years without too many complaints.

Likewise, my first answer should have been sufficient to prompt some sort of coherent response from the OP - but to date nothing has been forthcoming - so it would seem that any further response directed to the OP is a waste of time.

It parallels another brief and fairly meaninglesss posting from the same OP asking what was a basically a 1st year student question - again from memory little if any reply from the OP.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[JJPellin]

Artisi and pumpsonly are absolutely correct. Without additional details, no meaningful recommendation is possible. We have oily water applications that would degrade most composites, crack 316 SS or corrode 410 SS. Some require duplex SS or Monel to achieve reasonable life. We have others that run quite well with cast iron or plain cast carbon steel. What is the ph, temperature, chlorides, sulfides, ammonia, solids, etc?

Johnny Pellin