A selection of brass push-fit hose-tail barb connectors for connecting vacuum fittings to a range of hose sizes. Youre going to need a way to get that vacuum through the bag! The exclusive offers are REAL. Youre seeing this ad based on the products relevance to your search query. So you place your vacuum fitting inside a secondary piece of 4 tube-bag that has strips of infusion flow media inside. Let me know if you have opinions! Youll want an in-line gauge to see what your vacuum is as you adjust the dial. 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. See Safety Alert: Vacuum Pump Explosion in Chemistry Building for more information. For a lot of composites technologies, vacuum is an essential part of the process. They are also good for hard plumbing onto manifolds, pumps and catch-pots so you get an quick read on the vacuum level without touching buttons. Check frequently for blockage. You can use a regulator to dial back your vacuum level. 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! connects, pucks and probably many more things depending on who you hang out with! The exhaust ports of pumps stored in vacuum pump cabinets must be connected directly to the vent port inside the cabinet. If vacuum pumps are not properly installed, trapped and exhausted they may expose you to hazardous chemicals and vapors. The best solution in my opinion is either several cell or station-specific vacuum pumps (ideal) or a larger factory-wide vacuum system. Connect the exhaust line to the exhaust port in the vacuum cabinet (if one is present) using a thimble connectionorrun the hose into the fume hood. The last thing to look at here is a vacuum regulator. Philadelphia, PA 19104, E ehrs@ehrs.upenn.edu It sits on top of a strip of sealant tape and the bag goes over on another strip. You can use heavy gauge PVC in large diameters and have they vacuum plumbing be the accumulator! Order by 1pm (Mon-Fri) for same day dispatch[? Liquid Nitrogen condenses oxygen and this may cause an explosion. Suite 400 For vacuum infusion, this is a different story this here applies to bagged wet layup and pre-pregs work. Do not connect to an extension cord or power strip. Some of this stuff can be dangerous and the warning dont try this at home applies. Our range includes permanent metal fittings for 'dry side' use as well as disposable plastic fittings for connecting and branching 'wet side' resin hoses. Unless you make huge stuff, Im going to try to talk you out of hoses bigger than 1/2 / 12mm inside diameter. It reads vacuum (in inches of mercury inHg) relative to the ambient atmospheric pressure so youll get somewhat different readings dependent on the weather. Maintain trap during the experiment. Vacuum pumps which are used to evacuate systems containing toxic, corrosive or volatile substances must be vented into the buildings exhaust system. I see lots of people use this for infusion and it is a poor choice at least for the vacuum side. For all systems involving potentially hazardous materials, vacuum exhaust for must be vented to a laboratory exhaust duct or fume hood. This is a set of 1/4 ISO 7241-B or Parker ISO-B style fittings with 1/4 NPT thread. Pumps may start automatically if connected to a power source. The pump may not vent into the cabinet interior. If you find yourself doing pre-preg or infusion at any commercial level, a digital gauge will really give you a better feel for whats going on especially an absolute gauge. If you look at very high vacuum systems used in lab / science / fancy industry work youll see these are the standard for vacuum. Its like a remote vacuum port. These are patented and sold by Earth and Flight Sciences. The trap must be adequately sized and cold enough to condense vapors in the experiment. Price and other details may vary based on product size and color. No sense using expensive quick-connects on a catch pot inlet though you can add multiple inlets and it does make sense to use whatever type of fitting you use for vacuum hoses to connect the pot to the pump. The vacuum port is on one end and the other end sits under the perimeter bag seal with its own extra tacky-tape seal. There is another type of through-bag connector in there on the upper right that goes through the sealant tape at the edge of the bag. You should start with an analog gauge theyre cheap and they give you a pretty good idea whats up. There arent really any other good ways to apply huge amounts of pressure to large irregularly shaped areas! All rights reserved. Materials, equipment and training for advanced composites. Service cords and plugs must be free of defects. This one has a gauge and a small regulator on it and was sold by Airtech. How to Handwash, Handrub and Remove Gloves? Typically these are rated to take heat in the 150C / 300F range which is fine for most non-aerospace pre-preg work. 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. For more on vacuum bagging, see: INTRODUCTION TO VACUUM BAGGING. To help reduce oil loss, ensure that the tubing is sized properly and secured in such a way that oil will drain back into the pump instead of collecting in the tubing. Ensure that exhaust tubing is not kinked. For this a gauge is key. I like brass because of the reduced likelihood of rusting when in contact with moisture and theyre cheap. If you use thread sealant properly and tighten your threaded connections well, leaking shouldnt be a problem. This fan helps remove excess heat from the pump cabinet. To accomplish this, tubing must be connected directly to the exhaust outlet on the pump and routed into the hood or exhaust duct port. 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. This is the knob-equipped brass item connected to the back hose. Trim the tubing to a length that reaches the port without sharp bends/kinks that could obstruct the flow of the pump exhaust. The problem with a large vacuum system is that it isnt robust when it comes to problems in one area impacting other areas. For most processes, you (hopefully!) There are plenty of cases where they are necessary and if youre doing that then you know what youre doing already. 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. This is especially important if you do oven or autoclave curing, where mistakes can have high stakes! Typically these are use for hydraulics but work great for many things, including vacuum. The tan hose in the picture is Airtech Airflow 65R which is an oven hose for use up to 450F / 230C. The pipe is 4 PVC with a cap glued on and some barbed hose fittings of the right size for the polyethylene hose that works best for disposable infusion and wet-layup hose. You may need to use them to interface with pumps and filters though so they are good to now about. Best to tap the holes, but if not itll probably be ok if you drill holes slightly undersized and make the threads engage. If you do need large diameter hoses to handle the vacuum distribution, you can use them to place manifolds at areas where smaller hoses can connect to parts. Infusion is all about vacuum as much as possible in many cases. Nickel-plated brass reducing bush to reduce female 1/2" BSP to female 1/4" BSP. Be safe! When in doubt add some bag sealant tape! General purpose vacuum fittings in 1/4" and 1/2" BSP threads (the same as 'G' or 'Gas' threads. Ask me how I know! It wont take pre-preg heat but it will be fine up to 140F / 60C or so and good for post-curing. Designed to sit inside our 8mm ID silicone vacuum hose to make the hose crush proof, including for autoclave use. Your hose plan with small local pumps is going to rely less on big hoses and more on manifolds and small hoses. Lots of my fittings are like this. EHRS recommends using a secondcold trap between the pump and the experiment for added protection. dont need a lot of flow except when first pulling down a vacuum bag, so small hoses are fine. Pipe threads are designed to get tighter as you screw them in but they also need some thread sealant to make them fully vacuum-tight. 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. See Safety Alert: Vacuum Pump Explosion in Chemistry Building for more information. Use a cold trap to prevent the degradation and contamination of pump oil. 4 Pieces 6015 R134A Brass Refrigerant Tank Adapter to R12 Fitting Adapter 1/2 Female Acme to 1/4 Male Flare Adaptor Valve Core and 6014 Vacuum Pump Adapter 1/4 Inch Flare Female to 1/2 Inch Acme Male, Mudder 7 Pieces Adjustable R134A Adapter Fitting with Quick Coupler High Low A/C 1/4 SAE HVAC, Refrigerant Dispenser Valve, 6014 and 6015 R134A Brass Tank/Vacuum Pump Adapter to R12 Fitting Adapter, Robinair (15500) VacuMaster Economy Vacuum Pump - 2-Stage, 5 CFM , Red, Kozyvacu Mini Split/HVAC/AUTO AC Repair Complete Tool Kit with 1-Stage 4.5 CFM Vacuum Pump, Manifold Gauge Set, Hoses and its Acccessories . Allow the pump to cool completely before venting or servicing, and disconnect it from power completely. You can put a paint pot inside to catch any resin that flows in. Pump oil will break down if exposed to high concentrations of solvents from the vacuum line. See and test specialist products in our on-site demo room. It will handle low pressure autoclave use too. The infusion mesh is held together with a few dots of bag sealant tape which keep it from sliding out. 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. See. This is usually done as a precaution or when chasing down leaks without yet knowing where they are you know seal the lowing hanging fruit first. 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If you dont want to spring for a fancy pot you can make catch pots from PVC pipe for about $20US each. Range of male-male and female-female straight connector vacuum fittings in nickel plated brass. Failure to properly vent the pump can result in contamination of the lab with hazardous chemical vapors. Because there are so many kinds of air pressure quick-disconnects you may find ones that work ok. You can make one with only one inlet or more than two. Pump oil must be compatible (i.e. Use these push-fit plastic T-connectors to split or branch sections of vacuum hose. Follow all manufacturer recommendations for oil changes and routine maintenance. I made some of these for small infusions and wet-layup and they lasted for years. Any painting pressure-pot will do as long as the gasket is in good shape. Belt guards must be in place for all belt-driven pumps. Vacuum pumps are used in a wide variety of experimental set ups. The cheapest is a plastic (polyethylene here regular infusion hose) that is stiff enough not to crush and flexible enough to handle. Vacuum will tend to pull things tighter rather than blow it up which is handy! All the professional infusers I have ever worked with or seen use polyethylene or (sometimes) silicone hose. 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. Youre talking about $50US worth of stuff there with the quick-disconnect so gooping them up with resin is bad! This is the low-end of autoclave hoses and fancy metal ones are available that handle up to 1000psi of pressure and 1000F / 500C. Reinforcement Spring for 8mm ID Vacuum Hose 5m. The catch-pot is there to keep resin from getting into the pump! Diffusion pumps contain oil at very high temperatures. They are cheap, and some types will work ok for a while. articles, videos, photos: Copyright 2022 Chris Rogers. These are small-diameter ones, which is generally what youd need for individual parts. 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. At the left we have regular air hose fittings which can work but are meant for pressure instead of vacuum and so they can leak and give you all kinds of trouble. Next in from the left (on the green hose) is my go-to vacuum quick-connect. 1/2" (12mm) internal diameter wire reinforced PVC vacuum hose recommended for higher capacity vacuum pumps and equipment. As long as you dont goop them up with resin which is less easy to do with pre-pregs theyll last a long time. Quarter-turn, female-female 1/4" BSP ball valve ideal for fitment to vacuum pumps, chambers and through-bag connectors. The black hose here is a pre-made 300psi air hose with vacuum fittings instead of air fittings. Youll need big fittings to go with more on that next. Breather fabric works ok too. Seeing the numbers to a decimal place or two is very helpful and it makes quality control measures easier to implement theres no skill required to read it. Range of nickel plated brass equal T-piece vacuum fittings in male-male and male-female versions. There are other more expensive types of quick connect fittings used for vacuum and I have used them working in other shops and they are great the main thing is finding something that is reliable, economical and good enough for what youre doing. The resolution is much better too, so you can get a great feel for infusion drop tests or your efforts to find that last leak on a cook bag. This is just polyethylene vacuum infusion hose with a barbed fitting and some infusion mesh taped on. Pump oil may be contaminated and should be disposed as chemical waste. do not use hydrocarbon pump oil with oxidizing gases or vapors) with the vapors that will pass through the pump. Pump connections can look the same. Breather covers the end where there is a hole on the bottom face. See, Connect the exhaust line to the exhaust port in the vacuum cabinet (if one is present) using a thimble connection. When connecting vacuum fittings, we strongly recommend the use of PTFE tape on all fittings to ensure an airtight seal. The green hose is an autoclave-rated vacuum hose capable of handling high temperature and external pressure to 150psi / 10bar. How to build with composite materials: design, tooling, materials, laminating and more. This is a great way to handle situations where you dont have room for a fitting under your bag. The base is a piece of PVC (or metal, or something vacuum-tight) that is held on with tacky tape (yellow). The Safety Alertalso provides guidance for selecting the appropriate pump for your research needs. Youll just need a way to plug the unused ones. The cost of low-end cook hoses is about double that of good quality room temperature hoses maybe $10-$12 US per foot. This site contains information that reflects the opinions of individual authors mostly me, Chris. After viewing product detail pages, look here to find an easy way to navigate back to pages you are interested in. Top subscription boxes right to your door, 1996-2022, Amazon.com, Inc. or its affiliates. If you are brave, you can just plumb a barbed fitting right to your vacuum pump and use this method to avoid hoses and connectors all together but dont suck resin into your pump or it will become an ex-vacuum pump! Heres a catch-pot made from a paint pressure pot. A range of nickel plated brass 90 elbow vacuum fittings in male-male and male-female versions. Heat adds another level of complexity, so for your pre-preg cooking adventures, the air hose wont cut it. Right there in the middle are two little silver-colored push-to-connect fittings for use with the plastic hoses. My favorite of this kind is Gorilla Hose (a Continental or Goodyear Brand) which is a 500psi-rated hose and its yellow which is cool. First a bit about connector types the image to the right shows five different options, and only three are really good for composites-level vacuum work! See the. Connect the pump inlet and outlet properly. This is really useful for bagged wet-layup where you want to limit resin bleed, and in some cases for infusion too. This can result in pump damage. Home:Articles:Tools and Equipment: Vacuum Stuff. And one last note on color and service type: If youre running a facility where many people use the hoses, try to color-code them to help prevent mistakes. 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. The black and blue GDH-200 one on the right is a low-end absolute gauge. This is a very tough and long-lasting hose for room temperature use. They are secure and when you get ones that are rated for it can handle vacuum very well. If the pump cannot be unplugged directly, contact EHRS for information about lock-out/tag-out before attempting to service the equipment. These are called: plates, frogs, vac. This hose has a metal core with a silicone rubber cover, so it is moderately flexible and easy on vacuum bags when laid on top of parts to be cooked. I make no promises about its usefulness! Hard plumbed hoses are ok for things that are staying in one place and unlikely to get gooped up but for most situations removable hoses will be much better! 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. The sketch shows my basic design which is far from perfect but worked for me. Never service a pump that is connected to power. The picture shows the six most common kinds of hoses youll find in composites shops. ], Need any help or advice?+44 (0)1782 454499. 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. 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.