Question [EU] Looking recommendations for Hose / Pipe / Fitting for Vacuum Pump

[pap.pine]

What are some affordable alternatives to stainless steel hoses or fittings for connecting the inlet (NW25) of an Edwards vacuum pump to 10mm (or something like that) piping and/or glassware connectors (e.g., PTFE 24/40 to pipe fitting)? I’m trying to avoid the high costs of stainless steel options, but also need something that won’t take too long to ship, unlike the much cheaper options from China.

Not sure is this valid way but I was thinking that pipes with 25mm diameter (NW25 (KF25))) fitting that's on the pump would be much easier to handle when connected to the glassware etc.

Some other concerns:

- Input filtering, should there be some general filter (prob not the Edwards OEM as they tend to cost quit a lot) to attach into piping? (Gonna build a cold trap when there is a need for that but other from that)
- Output (gas) filters. What kind of stuff there is that people could recommend. Preferably available either from ebay, aliexpress or such.

Any recommendations?

Thanks!

 

[Osmosis Vanderwaal]

I had never looked at sucja fitting before , and I often check out stuff that i havent seen, just to learn. 5 minutes ago i looked and i see when i search these terms the first 25 listings are traps or filters, which mormally would go there. As expensive as t hose pumps are, i wouldnt use it without one personally, but if I just had to, I would get a steel 40mm washer and probably 2-25mm washers and a 10-12mm threaded hose barb adaptor ( 10-24 threads on one sifde and a hose barb on the others snd sand the 400mm washer between the 2 25mm ones ( just to decrease the size of the hole because the 40mm washer wol probably have a bigger hole than 12mm, so the 25mm washers will be closer to the 10-12mm hole size) bolt it all togerher and run a hose off of it. I probably shouldnt respond at all because im not famoiar with the equipment, and like i said, if my vacuum source was $1000+, i wohldnt run it at all without a trap of some kind. I stick to under $100 for my vacuum source. I just love to talk. Summary, the land for that nw25 fitting is 40mm in diameter. Id statt there and find something to fit in the hole and tighten via a nut. Ive never seen tapered glassware mounted to steel, so i doubt its a popular good idea, but a hose barb, or pipe threaded fitting is very common and widly availabe, that could be bolted to a washer..........i dont know where you are using this at, but no filter is going to be effective against some chemicals, it needsnto be piped outdoorsmor something. For me it would likely be to a 15-20mm hose thay inwouldnstickndown thentoilet or sink past the water trap to vent into the sewer system. Ifnyounhave a septic tank i dont suggest that but a line to the roof.

 

[pap.pine]

Fair enough. Let's Talk!

 

[Osmosis Vanderwaal]

A laugh at my expense is perfectly fine with me, and is often the price of admission. If one cant laugh at themselves then surely they are lost. This compny makes a wide range of items, amd indidnt see a model # or anything. When i searched, the first result was a rotary claw type vacuum pump, which is similar to a roots supercharger in operation. Those are awsome, but i also saw rotary vane and diaphram pumps as well. What is the model? Are you using it just generally or do you have a specific use in mind? For instance, to operate a buchner funnel a person may wish to reduce the air pressure to...9psi, a reduction of 5.7 relative to sea level, but, some operations, analytical chemistry for instance, mat require crushing vacuum of 50 torr. Vacuum gets expensive fast. I can pull about -14 psig with a rotary vane pump i have, but the oil is ruined in as little as an hour or as much as 20, but vacuum pump oil gets expensive when it only lasts 1-20 hours. I have a few electric pumps that are dc 12-24 volts, they can only draw down to-12 psig or something to that effect on a static load. Water boils at around 70°c. Someday i will probably buy an aspirator, since they are cheap and powerful. The trade-off is it needs water to be pumped and the vacuum depends on the temperature of this water. theres a video on youtube and a guy uses an mini fridge crompressor and manages to liquify ammonia with it. i was shocked at the anount of vacuum it could produce.

 

[Tovenaar]

You using the big one? 28 from adwards? To make vacuum b? If so, i would advice to put an buffer tank betteen the