Offshoreonly.com - Superchiller pressure relief valve setting

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Quote:

Originally Posted by MILD THUNDER (Post 4341121)

I was just reading online some specs on the belt driven sea pumps. I saw . With either 10 or 15psi (cant recall at moment) the pump was able to move 2,400 gallons per hour at something like 3500rpm. Ill see if i can find that info tonight

https://youtu.be/HWGcvwHZSE8

At 3500 RPM the pumps would put out 35 GPM, thats 2100 GPH. The pumps didn't add more after that RPM because the impellers fold over and bypass. We also tested ram pressure. It didn't pay to have any more then about 8 psi to the pump. Anything more you are just creating more drag which equals less speed.

Quote:

Originally Posted by JRider (Post 4341096)

The way I plumbed my whipple cooler there was no need for a thru hull pickup...especially with an IMCO lower. I added a T before the sea pump, off the T I used a check valve and ran that to the cooler. After the sea pump I again added a T, off the T I used a pressure relief valve (set at ~5psi) and yet another T back to the feed line of the whipple. It worked really well, when the throttle was cracked the relief valve opened and started feeding the chiller, once on plane the water pressure on the inlet hose of the sea pump would open the check valve and take over feeding the cooler. As far as a pressure relief I would just use larger outlets out the chiller. With an IMCO lower you would not believe the volume and pressure that can be reached. I will try to sketch a diagram today.

Here is your stock IMCO lower water pickup.[ATTACH=CONFIG]544079[/ATTACH] And here is one thats modified.[ATTACH=CONFIG]544080[/ATTACH]. You are right, the stock pickup will grab a ton of water.. way more then the pump needs... You may as well drag an anchor.

My reason for asking was by boat originally had PRV plumbed in line, however they both started leaking. I started to question if i really needed them, I called Teauge and they said unless your north of 30 psi i shouldnt bother with them. I'm currently running a -10 in and two -10's out.

Even if you were above 30psi you could go to 12s out or go smaller on the supply.

couple things i would like to mention.1 a -12 line will flow a ton more water than a -10. 2 a -12 fitting with half inch pipe thread will flow the exact amount of water as a -12 fitting with a three quarter inch pipe thread.the cooler will do its job the best when you flow a ton of water through it and remember,pressure is just resistance of flow.

here is a pic of a -10 flare on the left, 1/2 NPT in middle, and -8AN on the right. You can see the -8 is much smaller orifice than both. The -10 is slightly smaller than the 1/2 NPT orifice, so like mike says, the -12 AN is about as big as you want, with 1/2 NPT.

I just got my intercoolers this week. I plan to do some various water flow testing thru them before installing, with different size fittings, a single in, dual out, dual in dual out, etc. I am sure at some point, the core itself will only flow so much water. I was thinking of running the discharge lines into a bucket, and recording the time it takes to fill the bucket, with a set pressure on the intake side, of the different setups. ??

asked this awhile ago didn't get much response thinking of running a larger heat exchanger to use anti freeze in the superchiller using a pump and cooling the exchanger with a thru hull fitting any thoughts on that