Pro/Forums - View Single Post

dacooltech · 03-21-2005, 05:11 PM

Dave cracking of tapped acryclic WB tops is not an unknown issue here... and it happens more often with tapped acrylic tops combined with 1/2"OD metal barbs and cumbersome 1/2"ID x 3/4"OD tubing... we received RMAs for tapped polycarbonated tops in the past, and stopped offering any blocks with tapped poly tops.

I must add, we haven't received a single RMA of tapped lucite Danger Den tops from any customer in the last ~2yrs or so though. So AFAIK the guys over at DD are doing a decent job with lucite tops like Jaydee said. [edit: it's also possible that customers are solving their issues directly with DD, and in that case we wouldn't know.]

If I use a clear topped block in one of own systems I prefer putting poly barbs on instead of metal barbs and never had any bad experiences.

If the top is not going to be clear then like Cathar already mentioned Delrin (Acetal) is the best choice IMHO. Cathar used Delrin for the 1st time as a WB top, and it's most definitely a great material. Definitely better than anodized AL, and also better than Brass or CU too, because it's lite.
But yea it's not clear though...

So I strongly agree with you that the possibility of cracks is there with tapped clear acrylic, metal 1/2" barbs, 1/2"ID x 3/4"OD tubing and plastic injection molding is the way to go for clear acrylic.

But don't you think the same is true for the pumps? What I really don't understand is that -since you're highly recommending plastic injection molding- why didn't you release the CSP pumps with plastic injection molded heads? When the CSP was first announced I spoke with Dan on the phone, and the 1st thing I asked was why anodized AL head instead of plastic injection molded head. and his answer was the required quantities are currently not there to justify the cost of the mold and offer the pump at that low price...
but if we're willing to put up money for the mold, he can make OEM pumps with plastic heads. -guess same is true for the new MAG pumps- he also told me that AVT's been selling large quantities of pumps with anodized heads to non-pc liquid cooling related customers and never had a single issue with anodized AL, so there's really no need for plastic pump heads... I must admit that i was a bit confused at the time if volume OEM orders are there, why not plastic heads for your pumps.
now from your previous posts I understand that you've been selling CSP pumps in large volumes to customers from other industries, yet you never released the pump with a plastic head. I mean if for any reason PIMed housing was not an option, and CNC milling was the way to go, why didn't/don't you use Acetal (Delrin) heads on the pumps?

Sorry this thread wasn't about your pumps, but it's something that i'm curious about, and really appreciated if you can elaborate

[Edit: typed plastic housing for the pump instead of pump head at one point, and got stuck with it :shrug: . corrected

]
[Edit: typo]

03-21-2005, 05:11 PM	#16
dacooltech Pro/Vendor Join Date: Feb 2002 Location: NYC Posts: 267	Why anodized AL pump head then ? Dave cracking of tapped acryclic WB tops is not an unknown issue here... and it happens more often with tapped acrylic tops combined with 1/2"OD metal barbs and cumbersome 1/2"ID x 3/4"OD tubing... we received RMAs for tapped polycarbonated tops in the past, and stopped offering any blocks with tapped poly tops. I must add, we haven't received a single RMA of tapped lucite Danger Den tops from any customer in the last ~2yrs or so though. So AFAIK the guys over at DD are doing a decent job with lucite tops like Jaydee said. [edit: it's also possible that customers are solving their issues directly with DD, and in that case we wouldn't know.] If I use a clear topped block in one of own systems I prefer putting poly barbs on instead of metal barbs and never had any bad experiences. If the top is not going to be clear then like Cathar already mentioned Delrin (Acetal) is the best choice IMHO. Cathar used Delrin for the 1st time as a WB top, and it's most definitely a great material. Definitely better than anodized AL, and also better than Brass or CU too, because it's lite. But yea it's not clear though... So I strongly agree with you that the possibility of cracks is there with tapped clear acrylic, metal 1/2" barbs, 1/2"ID x 3/4"OD tubing and plastic injection molding is the way to go for clear acrylic. But don't you think the same is true for the pumps? What I really don't understand is that -since you're highly recommending plastic injection molding- why didn't you release the CSP pumps with plastic injection molded heads? When the CSP was first announced I spoke with Dan on the phone, and the 1st thing I asked was why anodized AL head instead of plastic injection molded head. and his answer was the required quantities are currently not there to justify the cost of the mold and offer the pump at that low price... but if we're willing to put up money for the mold, he can make OEM pumps with plastic heads. -guess same is true for the new MAG pumps- he also told me that AVT's been selling large quantities of pumps with anodized heads to non-pc liquid cooling related customers and never had a single issue with anodized AL, so there's really no need for plastic pump heads... I must admit that i was a bit confused at the time if volume OEM orders are there, why not plastic heads for your pumps. now from your previous posts I understand that you've been selling CSP pumps in large volumes to customers from other industries, yet you never released the pump with a plastic head. I mean if for any reason PIMed housing was not an option, and CNC milling was the way to go, why didn't/don't you use Acetal (Delrin) heads on the pumps? Sorry this thread wasn't about your pumps, but it's something that i'm curious about, and really appreciated if you can elaborate [Edit: typed plastic housing for the pump instead of pump head at one point, and got stuck with it :shrug: . corrected ] [Edit: typo] __________________ www.cooltechnica.com Last edited by dacooltech; 03-22-2005 at 09:56 AM.