Looking for an axial fan datasheet - Page 1
Forum section: electronics / projects

author: veedub565
author_rank: Frequent Contributor
timestamp: February 11, 2024, 10:38:44 am
content: bit of a long shot, does anybody know where I might find a datasheet for the following axial fanIMC Boxer WS32107FL-570Hit's for a HP 3335A, I'm trying to find out what the static pressure of the original fan is, that manual just says 120cfm 115v*edit* 3160-0259 is the original HP part number

author: veedub565
author_rank: Frequent Contributor
timestamp: February 11, 2024, 11:04:45 am
content: nevermind, literally 5min after posting... I haven't found the information I wanted but kinda close enough.HP 3160-0259 (110cfm) was replaced by 3160-0097 (80cfm), which itself is now replaced by 3160-0899 (80cfm)3160-0899 = NMB 11938MB-A1N-EANMB 11938MB-A1N-EA datasheet says 89cfm and 64.7PA static pressure.Digi-Key have got an NMB 11938SB at a reasonable price, similar CFM but a higher static pressure of 94PA. So I'm probably safe to order that as a replacement since static pressure is an important factor here.Only small concern is the flow rate of the repalcement is down by around 30cfm over the orginal. Although that may not have been such an important consideration to begin with.

author: CaptDon
author_rank: Super Contributor
timestamp: February 11, 2024, 03:25:25 pm
content: Looking at the numbers you should be safe. That 120 c.f.m. rating may have been at a much lower back pressure. What about R.P.M.'s? Was the original a very noisy 3450 rpm and the replacements at 1725 rpm with lower cfm rating? We had some old Sorenson rack mount supplies that used 3450 rpm fans and the racks were so noisy it created headaches. (The Sorensons had a different name on them like Solitron or something, but they were indeed Sorensons)

author: veedub565
author_rank: Frequent Contributor
timestamp: February 12, 2024, 06:26:12 pm
content: I'm not sure on the RPM on the original, can't find any data on it. The NMB 11938SB is 2,600 rpm (min) though. It's possible when they made the 3335A that the only fan with a suitable static pressure spec, also just happened to have 120cfm. And the newer replacement meets the pressure spec with a lower cfm.

author: CaptDon
author_rank: Super Contributor
timestamp: February 13, 2024, 01:43:06 am
content: I forgot, you are in 50Hz land so 3000 rpm would be the syncronis speed and 2600 with slip. I should think at that RPM the fan will be noisy. We had some 115vac 400Hz aircraft stuff that ran around 20,000 rpm. They were hellish noisy!!! They were only 3" in diameter and moved a lot of air even with significant back pressure. They were built like the compressor section of a turbine engine. Over $1000.00 U.S.D. each!! I think they were Rotron 'AirMax' model.

author: veedub565
author_rank: Frequent Contributor
timestamp: February 23, 2024, 04:56:01 pm
content: Yep you were right, man that fan is noisy ! It's quieter than the old one, but not by much. And ALOT louder than the one I have in my 8341B . I noticed the metal bracket that holds it partially covers the edges of the fan causing some humming noise. I trimmed the metalwork back and that improved things, but still waaay louder than the 8341bIt's either going back on ebay, or having a quieter fan and it can cook.