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 other as 1.5 with a 1.1 SF. Both have 1.65 total hp.
Then, pump makers do the same thing with pumps. They make a full rated pump and a max rated pump that are identical.
This creates inefficiency in the supply chain by making distributors and retailers carry more total inventory.
This also creates confusion for people who buy pumps and motors.
In my opinion, it's time to end service factor and only rate motors and pumps by total hp.
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 other as 1.5 with a 1.1 SF. Both have 1.65 total hp.
Then, pump makers do the same thing with pumps. They make a full rated pump and a max rated pump that are identical.
This creates inefficiency in the supply chain by making distributors and retailers carry more total inventory.
This also creates confusion for people who buy pumps and motors.
In my opinion, it's time to end service factor and only rate motors and pumps by total hp.