24L Lab Diaphragm Vacuum Pump Oil Free Oilless Medical Mute Pump -95Kpa Air pump With Air filter

Update:* This pump will indeed do 0.05 atm with proper sealing. 👍 Should be more than adequate for "picky" vacuum distillation. I've also used it to assist in drying 3a and 4a molecular sieve -- microwave procedure (see internet).* The liquid trap was difficult for me to get off the first time. I wound up using channellock pliers ... carefully ... to loosen it. Hand tightening it back, tightly, worked fine afterward.* Still working fine!Original post:I've put maybe 40 hours of vacuum distillation time on this pump. Works fine. Not really sure what its ultimate vacuum is -- 0.1 to 0.05 atm probably? Dissolved air comes out of water immediately at room temperature. Just got a gauge....Pretty quiet (won't interfere with tv/regular conversation), no harsh sounds, and currently I'm taking no steps to muffle it.Seems like I picked a good one for some hobby chemistry, so far. Price was very right.And of course killer for vacuum filtration.

We are using this a vacuum source to calibrate pressure transducer. It's used with a mensor pressure controller and it allows for very stable control. With minimal leakage (there's always some), we're able to achieve ~0.5psia. That's excellent for our needs. I was concerned it would be slow to pull the vacuum but that was an unfounded worry. It's quick and holds the vacuum well.

Does exactly what I need and is surprisingly quiet. Pulls down to ~27" Hg fairly quickly, being used for testing leakage of sealed assemblies during manufacturing. Not getting heavy duty use and I haven't had it that long, so I can't speak to longevity. But I wouldn't hesitate to buy another one if I needed it.

Fairly quiet and draws a vacuum quickly. It’s working well in my application, which is evacuating the air from a hold-down for a concrete core drill. A few cons: 1) the pump won’t start if there is already a vacuum present at the outlet; 2) as other reviewers have said, the fittings can’t be removed without risk of damage; 3) no information about fittings or filter in description (i.e., thread sizes, replacement parts). This seems like it’s intended to be a disposable (not repairable) pump.

Good pump, much quieter than the oil splattering lab pumps I've used. Does a decent job with vacuum filtration of pastes. It's cute, clean and easy to use. Hides under a kitchen table chair. The on/off switch is on the power cord, which is nice because you can place the switch somewhere more convenient than right on the pump.

This is my only vacuum pump so take this positive review for what it's worth. I'm using it with a 3 gallon vacuum chamber for drying 3D printer filaments. It will get the vacuum chamber to 25 in Hg in about 90 seconds. Letting it run for another 30 seconds will get me to 27 in HG. Measured with an iphone at one ft away, it's about 61 decibels. Ambient level was 48 decibels with the pump off. It's relatively quiet in my opionion. It's compact and lightweight.I bought this as an alternative to those 1/4horsepower single stage oiled vacuum pumps all over Amazon at ~$75. I'm happy I spent the extra money.

Using HCl around it enough would destroy it. There’s no chemical protection (again not for a true laboratory). The Tube between diaphragms began to split. It was downhill from there. It’s garbage unless you just have requirements of an oilless vacuum that can’t handle the temperature of boiling water smh🤦🏽‍♂️.

The media could not be loaded. Wasn't sure at first. When I fired it up and put my finger over the hose it didn't seem like much pressure. However, I didn't understand how vacuum clamp pressure worked. It depends on the amount of area inside the clamping perimeter. I put together a temporary clamping base using a small piece of Baltic birch and some adhesive weatherstripping. You can see in the video that it will hold a guitar vertically,even with 2 clamps on the neck. (There a bit of a dead spot in the video where I had to set the camera down, wait for the end to see it suck the guitar up to the clamp)