Going to talk to a few people and get a better idea on what works and what doesnt. Guidance to Supervisors - Staff with COVID-19 Health Questions, Research Resumption: Lab PPE and Preventing COVID-19 Transmission in Penn Labs, Lab Cleaning and Disinfection COVID-19 Guidance, Reordering Information for COVID-19 Transmission Prevention Supplies, BSL-2 Enhanced Training for Processing COVID-19 Patient Specimens, Close Proximity Work Standard Operating Procedure, Eating and Use of Conference Rooms - Best Practices, Wastewater Monitoring: Spring 2021 Pilot Program - FAQ, Face Coverings, Masks and Respirators Compared, Mask and General PPE Guidance for Essential Penn Laboratory Personnel, Precautions for the Distribution of University Supplied Face Masks, Recommendations for cleaning labs with Suspected/Confirmed COVID-19 cases, EHRS COVID-19 Guidance for FRES and Housekeeping, EHRS COVID-19 Guidance for Security and Delivery Activities. Liquid Nitrogen condenses oxygen and this may cause an explosion. A range of nickel plated brass 90 elbow vacuum fittings in male-male and male-female versions. These are great for tidy bagged wet-layup and pre-preg, where you can place them out of the way of resin.
This one has two inlets the brass looking ones to the sides and a single vacuum port on top to connect to the pump. When in doubt add some bag sealant tape! PVC pipe is ok, metal is better.
Allow the pump to cool completely before venting or servicing, and disconnect it from power completely. The base is a piece of PVC (or metal, or something vacuum-tight) that is held on with tacky tape (yellow). articles, videos, photos: Copyright 2022 Chris Rogers. If you dont want to spring for a fancy pot you can make catch pots from PVC pipe for about $20US each. Large air hose with wire reinforcement or hydraulic hose can work great for this. Subscribers to our insider newsletter get exclusive savings on selected products and early access to FREE training content. Follow all manufacturer recommendations for oil changes and routine maintenance. Pre-pregs bring high heat to the mix and potentially lots of extra pressure in an autoclave. Typically these are rated to take heat in the 150C / 300F range which is fine for most non-aerospace pre-preg work. It reads vacuum (in inches of mercury inHg) relative to the ambient atmospheric pressure so youll get somewhat different readings dependent on the weather. I didnt buy it new (came with a used vacuum pump) and I dont suggest you buy a fully assembled version if you want to save money. 
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Avoid the more flexible clear (Tygon type) PVC hose because it crushes easily and will choke itself off if bent around tight corners! They are secure and when you get ones that are rated for it can handle vacuum very well. Best to tap the holes, but if not itll probably be ok if you drill holes slightly undersized and make the threads engage. vacuum clarks vc connectors cooling promotion pump fan pumps equipment vacuum pump fan clarks vc connectors cooling promotion pumps equipment Note that some oil mist separators may not fit into your vacuum pump cabinet. compressor installation pump vacuum services rental
If you look at very high vacuum systems used in lab / science / fancy industry work youll see these are the standard for vacuum. When connecting vacuum fittings, we strongly recommend the use of PTFE tape on all fittings to ensure an airtight seal. Service cords and plugs must be free of defects. As long as you dont goop them up with resin which is less easy to do with pre-pregs theyll last a long time. See SOP: Cryogens and Dry Ice for more information aboutpreventing theformation of liquidoxygen and what steps to take if you observe that oxygen has condensed. All content copyright (C) Easy Composites Ltd, 2022. Any place that makes hydraulic hoses to order can make you air or vacuum hoses too and it can be much cheaper than McMaster-Carr or your local equivalent! If you go the hard-plumbed vacuum system route, try to use a few accumulators around your facility to buffer drops in vacuum and smooth out the system. Vacuum will tend to pull things tighter rather than blow it up which is handy! For this a gauge is key. For vacuum infusion, this is a different story this here applies to bagged wet layup and pre-pregs work. 3160 Chestnut Street Use a cold trap to prevent the degradation and contamination of pump oil. 
You can use heavy gauge PVC in large diameters and have they vacuum plumbing be the accumulator! Vacuum pumps must be serviced by an authorized vendor on the schedule recommended by the pump manufacturer. 
pump vacuum electric chevy vehicle installation Your hose plan with small local pumps is going to rely less on big hoses and more on manifolds and small hoses. ], Need any help or advice?+44 (0)1782 454499. Basic Numbers and Calculations for Composites, Composites Details: Edges, Holes and Joints, How to Choose a Vacuum Pump for Composites, Vacuum Stuff: Hoses, Fittings and Accessories, Carbide and Diamond Cutters for Composite Machining, Fixturing with 5 Minute Epoxy and Cradles, Long-fiber Composites 3D Printing in 2019, Festool Power Tools: For When the Dust is Super Gross, Dinghy Bunk Plugs with Sprayable Tooling Paste, HOW TO CHOOSE A VACUUM PUMP FOR COMPOSITES. Materials, equipment and training for advanced composites. Small pumps local to different work areas are good because they are reconfigurable and provide local control over the system. Please do not copy without permission. coolant connection oemvwshop The gray gauge in the middle is a standard digital gauge that works pretty well as an upgrade from a dial-type analog gauge. If you overflow your job and get resin in the pot, you can bust open the base and clean it out after the resin cures or you can just leave it if its a small amount. These can be good for cheap connections for room-temperature wet-bagged and infusion work. My goal is not to tell you exactly what to use, but to show you what I use and explain why, and point out the key ingredients to successful vacuum systems. Range of male-male and female-female straight connector vacuum fittings in nickel plated brass. See the.
Use these push-fit plastic T-connectors to split or branch sections of vacuum hose. If you use thread sealant properly and tighten your threaded connections well, leaking shouldnt be a problem.
Failure to properly vent the pump can result in contamination of the lab with hazardous chemical vapors. Let me know if you have opinions! Designed to sit inside our 8mm ID silicone vacuum hose to make the hose crush proof, including for autoclave use. connects, pucks and probably many more things depending on who you hang out with! Reinforcement Spring for 8mm ID Vacuum Hose 5m. The infusion mesh is held together with a few dots of bag sealant tape which keep it from sliding out. Discover more about the small businesses partnering with Amazon and Amazons commitment to empowering them. Suite 400 Typically these are use for hydraulics but work great for many things, including vacuum. Shop products from small business brands sold in Amazons store. One more way to protect your vacuum connectors check out the piece of tube bag assembled in the middle with infusion mesh and a fitting. The last thing to look at here is a vacuum regulator. Both PTFE tape and liquid thread-sealant work ok. Brass fittings are nice because they are softer and less likely to corrode and they are cheap. A selection of brass push-fit hose-tail barb connectors for connecting vacuum fittings to a range of hose sizes. There are plenty of cases where they are necessary and if youre doing that then you know what youre doing already. Dont use these nice through-bag fittings for infusion because youll ruin em! A cold trap must be placed between the pump and the experiment tominimizethe amount of volatile chemicals from reaching the pump oil.
Price and other details may vary based on product size and color. At $300US or so, its not cheap, but totally worth it if you routinely put thousands of dollars worth of material and labor under vacuum bags. You need to have a wire reinforced hose, so ones rated for higher pressure work best and these will usually take moderate heat up to 180F / 80C or so. Trim the tubing to a length that reaches the port without sharp bends/kinks that could obstruct the flow of the pump exhaust. Youre talking about $50US worth of stuff there with the quick-disconnect so gooping them up with resin is bad! 
When you use this kind of gauge, the best you can do is get down to 0 so as your bag gets better it is like a count-down. This article is about the stuff between your vacuum pump and your part: the hoses, fittings and connectors. This will probably be fine for low-vacuum wet layup work where theres lots of wet resin flying around and the likelihood of gooping up fittings is real. In the middle of the picture you can see two of the common type of through-bag connectors one with a 90-degree fitting. Use an oil mist separator (purchased from the pump vendor) to prevent oil loss. The problem with a large vacuum system is that it isnt robust when it comes to problems in one area impacting other areas.
You should start with an analog gauge theyre cheap and they give you a pretty good idea whats up.
Philadelphia, PA 19104, E ehrs@ehrs.upenn.edu vacuum connection condenser cheresources attached thumbnails If the vacuum pump cabinet has a cooling fan on the rear wall, ensure that the grate on the fan is free of dust and debris. You can put a paint pot inside to catch any resin that flows in. Keep combustibles away from pumps. You may need to use them to interface with pumps and filters though so they are good to now about. I like brass because of the reduced likelihood of rusting when in contact with moisture and theyre cheap. Top subscription boxes right to your door, 1996-2022, Amazon.com, Inc. or its affiliates. Do not connect to an extension cord or power strip. See and test specialist products in our on-site demo room. This section is about how to do it, and what fittings are commonly used. The vacuum port connects through another hole, so resin will drip into the pot and air will pass through to the vacuum pump free of resin. Unless you make huge stuff, Im going to try to talk you out of hoses bigger than 1/2 / 12mm inside diameter. vacuum evacuation pump refrigerator diagram troubleshooting microns triple commissioning deep typical shows connection fig hg You can unsubscribe at any time.We never send spam or share your details. vacuum pump rc2 npt shut vnr valve connection male pumps accessories The tan hose in the picture is Airtech Airflow 65R which is an oven hose for use up to 450F / 230C. Youll want an in-line gauge to see what your vacuum is as you adjust the dial. With all those nice hoses, youre going to need some way to connect them to each other and to you pump and bag. 
This alone is a really good reason to use digital gauges in manufacturing environments. 
Infusion is all about vacuum as much as possible in many cases. Check frequently for blockage. Pump oil will break down if exposed to high concentrations of solvents from the vacuum line.
I see lots of people use this for infusion and it is a poor choice at least for the vacuum side. F (215) 898-0140, 2022University of Pennsylvania Environmental Health & Radiation Safety | Report accessibility issues & get help, Fact Sheet: Vacuum Pump Use and Installation. How to Handwash, Handrub and Remove Gloves? You can use a regulator to dial back your vacuum level. The picture shows the six most common kinds of hoses youll find in composites shops. It wont take pre-preg heat but it will be fine up to 140F / 60C or so and good for post-curing.
Youll just need a way to plug the unused ones. Extreme care must be exercised to prevent the introduction of room air into a trap containing liquid nitrogen. This fan helps remove excess heat from the pump cabinet. The green hose is an autoclave-rated vacuum hose capable of handling high temperature and external pressure to 150psi / 10bar. The most basic type of hose for oven use is silicone radiator hose or coolant hose. This has a silicone cover with wire reinforcement and can be made up with barbed fittings and hose clamps. For most processes, you (hopefully!) The vacuum port is on one end and the other end sits under the perimeter bag seal with its own extra tacky-tape seal. diffusion ec21 
Our range includes permanent metal fittings for 'dry side' use as well as disposable plastic fittings for connecting and branching 'wet side' resin hoses. Dont just jam a hose under the bag without some distribution medium over the end because it will suck the bag into the hose and pop it or it will fill up with resin and choke off the flow. Your vacuum stuff has to match your process. Maintain trap during the experiment. 
The black hose here is a pre-made 300psi air hose with vacuum fittings instead of air fittings. Pump connections can look the same. The cost of low-end cook hoses is about double that of good quality room temperature hoses maybe $10-$12 US per foot. For all systems involving potentially hazardous materials, vacuum exhaust for must be vented to a laboratory exhaust duct or fume hood. 
Finally the simplest vacuum connection of all that big curvy guy at the right a hose with something wrapped around the end and a quick connect fitting on the other. I make no promises about its usefulness! Any painting pressure-pot will do as long as the gasket is in good shape.
These are small-diameter ones, which is generally what youd need for individual parts. Use these straight plastic push-fit barb connectors to join lengths of vacuum hose.
pump connection edg vcr This is often the type of fitting found on high-vacuum pumps and this is one I used to interface with a Leybold pump I used to have. Digital ones give a more fine-grained read on your vacuum level and more importantly changes in your vacuum level. The Safety Alertalso provides guidance for selecting the appropriate pump for your research needs. Next in from the left (on the green hose) is my go-to vacuum quick-connect. The best solution in my opinion is either several cell or station-specific vacuum pumps (ideal) or a larger factory-wide vacuum system. These are patented and sold by Earth and Flight Sciences. Vacuum pumps which are used to evacuate systems containing toxic, corrosive or volatile substances must be vented into the buildings exhaust system. P (215) 898-4453 This can result in pump damage. This is the knob-equipped brass item connected to the back hose. Because there are so many kinds of air pressure quick-disconnects you may find ones that work ok. Ask me how I know! You have got to have a hose. Youll need big fittings to go with more on that next. coolant oemvwshop excl Pumps for rotary evaporators must be located in a fume hood, vent to dedicated lab exhaust, or be equipped with adequate condensers and traps to prevent emission of solvent vapors into the lab. General purpose vacuum fittings in 1/4" and 1/2" BSP threads (the same as 'G' or 'Gas' threads. Quarter-turn, female-female 1/4" BSP ball valve ideal for fitment to vacuum pumps, chambers and through-bag connectors.
Place the pump on a tray so that spilled oil is contained. Plug the pump directly into an outlet. See. do not use hydrocarbon pump oil with oxidizing gases or vapors) with the vapors that will pass through the pump. The pump may not vent into the cabinet interior. Monitor the level of pump oil to ensure it is not low or overfilled. See, Connect the exhaust line to the exhaust port in the vacuum cabinet (if one is present) using a thimble connection.
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