2000gph Ballast Pumps????

(italianboy) · (italianboy) **Join Date: Jun 2004** 02-06-2006, 4:14 PM

How can these two pumps flow the same amount of water????

(bigshow) · (bigshow) **Join Date: Feb 2005** 02-06-2006, 4:30 PM

One can do it at higher pressure. Pumping in to 12 inches of head is way easier than pumping into 10 feet of head. You need pressure vs. volume engineering curves to see the difference between these two pumps.

(schackdaddy) · (schackdaddy) **Join Date: Dec 2005** 02-06-2006, 5:53 PM

V/A=Q The large pump it would appear has a much lower velocity to acheive the same flow rate since the cross sectional area of flow is larger.

V1/A1=Q1=Q2=2000gph, V1*A2=V2*A1
Fluid Mechanics and Hydraulics.

Just a thaught.

(italianboy) · (italianboy) **Join Date: Jun 2004** 02-06-2006, 5:57 PM

Ok I get it thanks alot. I am doing some research into building my own ballast system over the winter. I am looking between the 2000gph Skylon pump or this Jabsco ballast pump. What are the differences???

(bigshow) · (bigshow) **Join Date: Feb 2005** 02-06-2006, 8:11 PM

I've spent a little time looking but have never seen any data to make a meaningful comparison. If you find any more information I'd like to see it to. What are the leading ballast pump brands, anyone? We’ve been using some pumps for a project at work. Some of the technical data doesn’t live up to the marketing.

(wakescene) · (wakescene) **Join Date: Feb 2001** 02-06-2006, 8:32 PM

Chris,
Are you sure your comparing the correct specifications. The pump on the left should list a rating like x-GPM(Gallons Per Minute) whereas the Rule pump is x-GHP (Gallons Per Hour).

The pump on the left would only need to push 34Gallons per minute to meet the 2000GPH rating.

(Message edited by wakescene on February 06, 2006)

(cyclonecj) · (cyclonecj) **Join Date: Jul 2001** 02-06-2006, 10:10 PM

I would use a couple of jabscos for your fill pumps and use multiple rule 1100's or bass pro tsunamis to drain. If you want to know the ins and outs of aerators and vane/impeller pumps you should probably use the search button, it's been covered ad nauseum

(italianboy) · (italianboy) **Join Date: Jun 2004** 02-08-2006, 6:12 AM

I found that the Jabsco pump will push around 10gph and the Skylon says it will do 2000gph. I found this hard to believe so I did a search on Google for 2000gph pumps and the first one to come up was an Izumi 2000gph 4hp 2in water pump, the first pic. I think I am going to go with the reversible Jabsco pump and try and get solenoids for the valves. This way I can just throw the pump in reverse and be done with it. I did some calculations and found that if I have around 108 gal of water that’s about 900lbs. And to fill that with the Jabsco it would take around 10min but to fill it with 2000gph pump it would take a little more that 3min so that can't be right.

(Message edited by italianboy on February 08, 2006)

(schackdaddy) · (schackdaddy) **Join Date: Dec 2005** 02-09-2006, 2:56 AM

10gph is super slow, should that be 10gpm?

(italianboy) · (italianboy) **Join Date: Jun 2004** 02-09-2006, 10:33 AM

yea my bad 10gpm

jayp 02-09-2006, 6:46 PM

I did a simple triple ballast system using one reversible Jabsco Ballast Puppy. I never timed the fill time for 1200 lbs but the bags were always full when we were ready to ride.

(italianboy) · (italianboy) **Join Date: Jun 2004** 02-10-2006, 7:13 AM

Sweet, thats all I need to know. Do you have any pics of your system?? Thanks Jay

(toesideturtle) · (toesideturtle) **Join Date: Oct 2002** 02-10-2006, 8:21 AM

The ratings for these pumps are always incorrect--we use Rule 12v pumps at work and they only pump around half of what they are rated(and that's with head pressure under ideal conditions).