You may need to use them to interface with pumps and filters though so they are good to now about. Routine maintenance such as pump-oil changes may be performed by lab workers. This is just polyethylene vacuum infusion hose with a barbed fitting and some infusion mesh taped on. Pump oil will break down if exposed to high concentrations of solvents from the vacuum line. F (215) 898-0140, 2022University of Pennsylvania Environmental Health & Radiation Safety | Report accessibility issues & get help, Fact Sheet: Vacuum Pump Use and Installation. 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. Service cords and plugs must be free of defects. Order by 1pm (Mon-Fri) for same day dispatch[? 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Let me know if you have opinions! To accomplish this, tubing must be connected directly to the exhaust outlet on the pump and routed into the hood or exhaust duct port. When in doubt add some bag sealant tape! Liquid Nitrogen condenses oxygen and this may cause an explosion. If you look at very high vacuum systems used in lab / science / fancy industry work youll see these are the standard for vacuum. Philadelphia, PA 19104, E ehrs@ehrs.upenn.edu Digital ones give a more fine-grained read on your vacuum level and more importantly changes in your vacuum level. Explore Composites! Typically these are use for hydraulics but work great for many things, including vacuum. Because there are so many kinds of air pressure quick-disconnects you may find ones that work ok. Easy Composites Ltd, registered in England 7486797. Connect the pump inlet and outlet properly. They are cheap, and some types will work ok for a while. Be safe! Check frequently for blockage. Quick connect/disconnect (self-sealing) push-fit vacuum coupling suitable for high-temperature & autoclave use. Im not a fan of big complex vacuum systems, but in many factory situations it is really important. Failure to properly vent the pump can result in contamination of the lab with hazardous chemical vapors. Any painting pressure-pot will do as long as the gasket is in good shape. This is the low-end of autoclave hoses and fancy metal ones are available that handle up to 1000psi of pressure and 1000F / 500C. 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. Next in from the left (on the green hose) is my go-to vacuum quick-connect. ], Need any help or advice?+44 (0)1782 454499. Measure before you order. 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. I like brass because of the reduced likelihood of rusting when in contact with moisture and theyre cheap. Keep detailed records of all pump maintenance including routine maintenance and vendor-provided services. Subscribers to our insider newsletter get exclusive savings on selected products and early access to FREE training content. So you place your vacuum fitting inside a secondary piece of 4 tube-bag that has strips of infusion flow media inside. Trim the tubing to a length that reaches the port without sharp bends/kinks that could obstruct the flow of the pump exhaust. 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! Order and collect any products from our trade counter. You can either buy pre-made hoses and add fittings or have them made up by a hose shop locally to your specifications. Youll want an in-line gauge to see what your vacuum is as you adjust the dial. Some vacuum pumps cannot accommodate the type of oil-mist separator that has an outlet for exhaust tubing. Contact EHRS if you are unsure how to properly vent your vacuum pump. It will handle low pressure autoclave use too. 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. Empty the condenser trap immediately after evaporation is complete to eliminate the possibility that solvent will evaporate as the condenser warms to room temperature. What kind of hose you use depends on what you are doing and what kind of conditions youre doing it in! Place the pump on a tray so that spilled oil is contained. 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. This should be fine for almost anything you want to do on a hobby level. These are small-diameter ones, which is generally what youd need for individual parts. Best to tap the holes, but if not itll probably be ok if you drill holes slightly undersized and make the threads engage. Top subscription boxes right to your door, 1996-2022, Amazon.com, Inc. or its affiliates. Lots of my fittings are like this. Ask me how I know! It reads vacuum (in inches of mercury inHg) relative to the ambient atmospheric pressure so youll get somewhat different readings dependent on the weather. Suite 400 For more on vacuum bagging, see: INTRODUCTION TO VACUUM BAGGING. Nickel-plated brass reducing bush to reduce female 1/2" BSP to female 1/4" BSP. Do not connect to an extension cord or power strip. All rights reserved. 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! 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). This is the knob-equipped brass item connected to the back hose. Typically these are rated to take heat in the 150C / 300F range which is fine for most non-aerospace pre-preg work. In the middle of the picture you can see two of the common type of through-bag connectors one with a 90-degree fitting. You should start with an analog gauge theyre cheap and they give you a pretty good idea whats up. If you see any mistakes or disagree with anything here I would love to have a chance to learn from you please let me know! Brass barbed hose fittings will glue nicely into PVC pipe caps with pipe cement. 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. 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. See the. Range of male-male and female-female straight connector vacuum fittings in nickel plated brass. Breather fabric works ok too. It reads vacuum relative to absolute pressure, so it is not swayed by the atmospheric pressure. Reversing the flow direction can pressurize apparatus leading to rupture, failure of vessel, or oil contamination. This one reads in millibar (1/1000th of an atmosphere) and zero millibar (mbar) is equal to full vacuum or no air. Sure you can have backup pumps, and from a maintenance perspective it can be a big benefit but vacuum is critical to lots of composites processes and having your vacuum level drop because somebody else is doing something somewhere else can be really bad. This is especially important if you do oven or autoclave curing, where mistakes can have high stakes! This is a very tough and long-lasting hose for room temperature use. 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. With all those nice hoses, youre going to need some way to connect them to each other and to you pump and bag. Small pumps local to different work areas are good because they are reconfigurable and provide local control over the system. All content copyright (C) Easy Composites Ltd, 2022. This article is about the stuff between your vacuum pump and your part: the hoses, fittings and connectors. For most processes, you (hopefully!) Youll need big fittings to go with more on that next. Get one with a big enough dial to read and ideally an oil-filled one. The gray gauge in the middle is a standard digital gauge that works pretty well as an upgrade from a dial-type analog gauge. articles, videos, photos: Copyright 2022 Chris Rogers. This site contains information that reflects the opinions of individual authors mostly me, Chris. This fan helps remove excess heat from the pump cabinet. These are called: plates, frogs, vac. 3160 Chestnut Street Heres a catch-pot made from a paint pressure pot. See Safety Alert: Vacuum Pump Explosion in Chemistry Building for more information. The cheapest is a plastic (polyethylene here regular infusion hose) that is stiff enough not to crush and flexible enough to handle. Pump oil may be contaminated and should be disposed as chemical waste. You have got to have a hose. Youre seeing this ad based on the products relevance to your search query. The sketch shows my basic design which is far from perfect but worked for me. 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. Use an oil mist separator (purchased from the pump vendor) to prevent oil loss. Right there in the middle are two little silver-colored push-to-connect fittings for use with the plastic hoses. There are plenty of cases where they are necessary and if youre doing that then you know what youre doing already. 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. 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. The best solution in my opinion is either several cell or station-specific vacuum pumps (ideal) or a larger factory-wide vacuum system. You can use a regulator to dial back your vacuum level. Breather covers the end where there is a hole on the bottom face. For vacuum infusion, this is a different story this here applies to bagged wet layup and pre-pregs work. For all systems involving potentially hazardous materials, vacuum exhaust for must be vented to a laboratory exhaust duct or fume hood. 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. A cold trap must be placed between the pump and the experiment tominimizethe amount of volatile chemicals from reaching the pump oil. 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. The catch-pot is there to keep resin from getting into the pump! These are patented and sold by Earth and Flight Sciences. See. This one has two inlets the brass looking ones to the sides and a single vacuum port on top to connect to the pump. It wont take pre-preg heat but it will be fine up to 140F / 60C or so and good for post-curing. The black hose here is a pre-made 300psi air hose with vacuum fittings instead of air fittings. Pumps may start automatically if connected to a power source. Failure to properly vent the pump can result in contamination of the lab with hazardous chemical vapors. Never service a pump that is connected to power. The black and blue GDH-200 one on the right is a low-end absolute gauge. 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. Allow the pump to cool completely before venting or servicing, and disconnect it from power completely. In this case, safe venting of the pump exhaust to the hood or to an exhaust duct is the more important hazard control. 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. If you dont want to spring for a fancy pot you can make catch pots from PVC pipe for about $20US each. Different processes have different requirements. A cold trap must be placed between the pump and the experiment to, The trap must be adequately sized and cold enough to condense vapors in the experiment. connects, pucks and probably many more things depending on who you hang out with! 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. Some of this stuff can be dangerous and the warning dont try this at home applies. Materials, equipment and training for advanced composites. It sits on top of a strip of sealant tape and the bag goes over on another strip. Plug the pump directly into an outlet. Pump oil must be compatible (i.e. 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. You can unsubscribe at any time.We never send spam or share your details. 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! Reinforcement Spring for 8mm ID Vacuum Hose 5m. Either way mission accomplished no resin in the pump. Going to talk to a few people and get a better idea on what works and what doesnt. As long as you dont goop them up with resin which is less easy to do with pre-pregs theyll last a long time. Check frequently for blockage. EHRS recommends using a secondcold trap between the pump and the experiment for added protection. Belt guards must be in place for all belt-driven pumps. dont need a lot of flow except when first pulling down a vacuum bag, so small hoses are fine. The vacuum port is on one end and the other end sits under the perimeter bag seal with its own extra tacky-tape seal. Designed to sit inside our 8mm ID silicone vacuum hose to make the hose crush proof, including for autoclave use. 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. Monitor the level of pump oil to ensure it is not low or overfilled. Shop products from small business brands sold in Amazons store. You can put a paint pot inside to catch any resin that flows in. A lot of time youll see fittings with vacuum bag sealant tape wrapped around the threaded connections. 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. Youre going to need a way to get that vacuum through the bag! You also want to be sure to remove them from the bag before disposing of the film too many of these get thrown out by mistake. Infusion is all about vacuum as much as possible in many cases. The exclusive offers are REAL. You have to know how much vacuum you have got or how much air is not in your bag. General purpose vacuum fittings in 1/4" and 1/2" BSP threads (the same as 'G' or 'Gas' threads. do not use hydrocarbon pump oil with oxidizing gases or vapors) with the vapors that will pass through the pump. 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. The tan hose in the picture is Airtech Airflow 65R which is an oven hose for use up to 450F / 230C. If you are looking for a pump too, please check out: HOW TO CHOOSE A VACUUM PUMP FOR COMPOSITES. When connecting vacuum fittings, we strongly recommend the use of PTFE tape on all fittings to ensure an airtight seal. You can use it in disposable fashion, but it can also be fit with barbed or push-to-connect (shown) fittings and made a more permanent option. EC! This is a set of 1/4 ISO 7241-B or Parker ISO-B style fittings with 1/4 NPT thread. 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 .
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