The main differences between OH3 pumps and OH4 pumps
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Everyone! What is the main difference between the OH3 pump and the OH4 pump? Is it just the type of coupling that differs? I searched for many pictures of OH3-type pumps, but I didn’t see any separate bearing housings I hope some expert can give me some advice!
Where does it come from? ? ? ? ? ? ? ?
This is the chapter from API610, expert
? ? Is it just the coupling that’s different?
The cylindrical sections at both ends of the pump should be the bearing housings. If you look closely, there is a thinner cylindrical section below those two cylinders; that must be the pump shaft.