Service factor question?

[amin36]

Guys

why do we have different service factors for pool pump motors?

why don't pump manufacturers consider S.F equal to 1?

I mean i know true horse power comes from multiplying SF by HP.then WHAT IS THE NEED FOR HAVING A SERVICE FACTOR RATHER THAN 1?

Thanks

 

[ajw22]

SF is Service Factor, not Safety Factor.

Getting rid of "Service Factor" for motors.

Does service factor have any value? In my opinion, it has no value. In fact, I think that it only causes problems and confusion. The only number that really matters is the Total HP of the motor. Motor makers make two identical motors and label one as 1 hp with a 1.65 service factor and the...

www.troublefreepool.com

SF was eliminated in the US with the new energy regulations...

Pump DOE Regulations - Further Reading

www.troublefreepool.com

 

[amin36]

Thanks @ajw22

So for the pumps with no SERVICE FACTOR on them shall we assume it is considered 1 and THP is equal to HP of the motor?

I put the picture of the one i use as my port-vac

 

[ajw22]

Thanks @ajw22

So for the pumps with no SERVICE FACTOR on them shall we assume it is considered 1 and THP is equal to HP of the motor?

I put the picture of the one i use as my port-vac

Yes

 

[amin36]

Thanks and it is a 2.5 HP pump for port-vac.

Is it a good choice in your opinion?

 

[ajw22]

Thanks and it is a 2.5 HP pump for port-vac.

Is it a good choice in your opinion?

See how well it does the job for you.