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self priming centrifugal pump limitations
self priming centrifugal pump limitations
I am trying to decide if I can accept a vendor proposal to use a self priming centrifugal pump instead of a vane pump.
The application is for diesel unloading from trucks. Gravity draining is not an option. An air eliminator downstream of the pump will be used.
The concern I have is that the self priming centrifugal may not be able to perform a suction lift from a partially full tanker when the suction line is empty. If the suction line is empty, the air volume may be much larger than the priming chamber. The suction line is estimated to be 10 to 20 feet of 4" pipe and hose with a strainer, some valves, etc.
someguy79, wet self primers are essentially cheaters when it comes to self priming. You have to fill the housing (somehow whether it's a hole/plug on top, etc) at the beginning. In your case, you'd have to fill it with diesel. And it will spin that until the air is gone.
How about using a double diaphragm pump? Those pumps can move super viscous liquids and pasts even in cold weather. I think that would be ideal for your diesel. They have electric, water, and air driven double diaphragm pumps. But those things will self prime very easily, even if there is a lot of air or a leak. Plus it's a positive displacement pump, which means your diesel will always move forward.
Is flow pulsation an issue for your application? Buy a large pulsation dampener. Self-priming pumps
How about using a double diaphragm pump? Those pumps can move super viscous liquids and pasts even in cold weather. I think that would be ideal for your diesel. They have electric, water, and air driven double diaphragm pumps. But those things will self prime very easily, even if there is a lot of air or a leak. Plus it's a positive displacement pump, which means your diesel will always move forward.
Is flow pulsation an issue for your application? Buy a large pulsation dampener. Self-priming pumps
2011-06-02
