Use these straight plastic push-fit barb connectors to join lengths of vacuum hose. 
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If you look at very high vacuum systems used in lab / science / fancy industry work youll see these are the standard for vacuum. You may need to use them to interface with pumps and filters though so they are good to now about. The black hose here is a pre-made 300psi air hose with vacuum fittings instead of air fittings. This one reads in millibar (1/1000th of an atmosphere) and zero millibar (mbar) is equal to full vacuum or no air. See the. 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!
See Safety Alert: Vacuum Pump Explosion in Chemistry Building for more information. Brass barbed hose fittings will glue nicely into PVC pipe caps with pipe cement. They are secure and when you get ones that are rated for it can handle vacuum very well. When connecting vacuum fittings, we strongly recommend the use of PTFE tape on all fittings to ensure an airtight seal. In this case, safe venting of the pump exhaust to the hood or to an exhaust duct is the more important hazard control. To accomplish this, tubing must be connected directly to the exhaust outlet on the pump and routed into the hood or exhaust duct port. If you are looking for a pump too, please check out: HOW TO CHOOSE A VACUUM PUMP FOR COMPOSITES. Ensure that exhaust tubing is not kinked. Easy Composites Ltd, registered in England 7486797. This is a great way to handle situations where you dont have room for a fitting under your bag. You should start with an analog gauge theyre cheap and they give you a pretty good idea whats up. The Safety Alertalso provides guidance for selecting the appropriate pump for your research needs. They are available in steel, brass and stainless steel steel and brass (on the plate fitting and clear hose) are about half the price of stainless. Unless you make huge stuff, Im going to try to talk you out of hoses bigger than 1/2 / 12mm inside diameter. Pump oil will break down if exposed to high concentrations of solvents from the vacuum line. Reversing the flow direction can pressurize apparatus leading to rupture, failure of vessel, or oil contamination.
The trap must be adequately sized and cold enough to condense vapors in the experiment. This fan helps remove excess heat from the pump cabinet. Heres a catch-pot made from a paint pressure pot. You can use a regulator to dial back your vacuum level. Range of male-male and female-female straight connector vacuum fittings in nickel plated brass. Going to talk to a few people and get a better idea on what works and what doesnt. If vacuum pumps are not properly installed, trapped and exhausted they may expose you to hazardous chemicals and vapors.
You can put a paint pot inside to catch any resin that flows in. Be safe! Routine maintenance such as pump-oil changes may be performed by lab workers. 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. This is the knob-equipped brass item connected to the back hose. Use these push-fit plastic T-connectors to split or branch sections of vacuum hose. Home:Articles:Tools and Equipment: Vacuum Stuff. 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. 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. Youre going to need a way to get that vacuum through the bag! Dont use these nice through-bag fittings for infusion because youll ruin em! Small pumps local to different work areas are good because they are reconfigurable and provide local control over the system. This should be fine for almost anything you want to do on a hobby level. Quick connect/disconnect (self-sealing) push-fit vacuum coupling suitable for high-temperature & autoclave use. 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! 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. This one has two inlets the brass looking ones to the sides and a single vacuum port on top to connect to the pump. Use a cold trap to prevent the degradation and contamination of pump oil. 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. It reads vacuum relative to absolute pressure, so it is not swayed by the atmospheric pressure. 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. Suite 400 Your recently viewed items and featured recommendations, Select the department you want to search in. These are small-diameter ones, which is generally what youd need for individual parts. Vacuum pumps are used in a wide variety of experimental set ups. Typically these are use for hydraulics but work great for many things, including vacuum. Check frequently for blockage. Your vacuum stuff has to match your process.
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. The cheapest is a plastic (polyethylene here regular infusion hose) that is stiff enough not to crush and flexible enough to handle. Pumps may start automatically if connected to a power source. This is especially important if you do oven or autoclave curing, where mistakes can have high stakes! With all those nice hoses, youre going to need some way to connect them to each other and to you pump and bag. Note that some oil mist separators may not fit into your vacuum pump cabinet. 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. All content copyright (C) Easy Composites Ltd, 2022. articles, videos, photos: Copyright 2022 Chris Rogers. 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. You have to know how much vacuum you have got or how much air is not in your bag. There are plenty of cases where they are necessary and if youre doing that then you know what youre doing already. The tan hose in the picture is Airtech Airflow 65R which is an oven hose for use up to 450F / 230C. Further right, the cone shaped item is an example of a high-vacuum fitting that uses a set of flanges and a compressed sealing ring. Typically these are rated to take heat in the 150C / 300F range which is fine for most non-aerospace pre-preg work. This section is about how to do it, and what fittings are commonly used. The cost of low-end cook hoses is about double that of good quality room temperature hoses maybe $10-$12 US per foot. dont need a lot of flow except when first pulling down a vacuum bag, so small hoses are fine. They are cheap, and some types will work ok for a while. 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. Breather covers the end where there is a hole on the bottom face. For this a gauge is key. 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. This is a set of 1/4 ISO 7241-B or Parker ISO-B style fittings with 1/4 NPT thread. 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. Shop products from small business brands sold in Amazons store. It wont take pre-preg heat but it will be fine up to 140F / 60C or so and good for post-curing. You can make one with only one inlet or more than two. Never service a pump that is connected to power. Heat adds another level of complexity, so for your pre-preg cooking adventures, the air hose wont cut it. Belt guards must be in place for all belt-driven pumps. 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! All rights reserved. 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. 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. If you dont want to spring for a fancy pot you can make catch pots from PVC pipe for about $20US each. 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. Designed to sit inside our 8mm ID silicone vacuum hose to make the hose crush proof, including for autoclave use. All the professional infusers I have ever worked with or seen use polyethylene or (sometimes) silicone hose. The sketch shows my basic design which is far from perfect but worked for me.
See, Connect the exhaust line to the exhaust port in the vacuum cabinet (if one is present) using a thimble connection. Philadelphia, PA 19104, E ehrs@ehrs.upenn.edu General purpose vacuum fittings in 1/4" and 1/2" BSP threads (the same as 'G' or 'Gas' threads. Subscribers to our insider newsletter get exclusive savings on selected products and early access to FREE training content. Contact EHRS if you are unsure how to properly vent your vacuum pump. 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. Top subscription boxes right to your door, 1996-2022, Amazon.com, Inc. or its affiliates.
Explore Composites! connects, pucks and probably many more things depending on who you hang out with! PVC pipe is ok, metal is better. You can buy this hose cut to length if you want to make your own or have a hose shop make up hoses to your specification. I like brass because of the reduced likelihood of rusting when in contact with moisture and theyre cheap. 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 vacuum port is on one end and the other end sits under the perimeter bag seal with its own extra tacky-tape seal. 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. What kind of hose you use depends on what you are doing and what kind of conditions youre doing it in! I made some of these for small infusions and wet-layup and they lasted for years. 4-way aluminium manifold block with all female 1/4" BSP threads suitable for vacuum coupling points, branched connections and general vacuum assemblies. F (215) 898-0140, 2022University of Pennsylvania Environmental Health & Radiation Safety | Report accessibility issues & get help, Fact Sheet: Vacuum Pump Use and Installation. 1/2" (12mm) internal diameter wire reinforced PVC vacuum hose recommended for higher capacity vacuum pumps and equipment. 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.
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 black and blue GDH-200 one on the right is a low-end absolute gauge. Failure to properly vent the pump can result in contamination of the lab with hazardous chemical vapors. For composite work they are just overkill. Infusion is all about vacuum as much as possible in many cases. Right there in the middle are two little silver-colored push-to-connect fittings for use with the plastic hoses. Monitor the level of pump oil to ensure it is not low or overfilled. How to Handwash, Handrub and Remove Gloves? Diffusion pumps contain oil at very high temperatures. 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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. Some vacuum pumps cannot accommodate the type of oil-mist separator that has an outlet for exhaust tubing. These can be good for cheap connections for room-temperature wet-bagged and infusion work. For vacuum infusion, this is a different story this here applies to bagged wet layup and pre-pregs work. This is really useful for bagged wet-layup where you want to limit resin bleed, and in some cases for infusion too. For bagged wet-layup, you may not need much overall vacuum, but you have to be able to regulate it and theres all that resin to not suck up. 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! The last thing to look at here is a vacuum regulator. 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. 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. 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. The best solution in my opinion is either several cell or station-specific vacuum pumps (ideal) or a larger factory-wide vacuum system. Ask me how I know! Liquid Nitrogen condenses oxygen and this may cause an explosion. Vacuum pumps which are used to evacuate systems containing toxic, corrosive or volatile substances must be vented into the buildings exhaust system. Pump oil must be compatible (i.e. Vacuum pumps which are used to evacuate systems containing toxic, corrosive or volatile substances must be vented into the buildings exhaust system. Youll want an in-line gauge to see what your vacuum is as you adjust the dial. As long as you dont goop them up with resin which is less easy to do with pre-pregs theyll last a long time. Discover more about the small businesses partnering with Amazon and Amazons commitment to empowering them. Some of this stuff can be dangerous and the warning dont try this at home applies. EC! A range of nickel plated brass 90 elbow vacuum fittings in male-male and male-female versions. You are responsible for your own judgement and outcomes. The gray gauge in the middle is a standard digital gauge that works pretty well as an upgrade from a dial-type analog gauge. 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 see lots of people use this for infusion and it is a poor choice at least for the vacuum side.
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. ], Need any help or advice?+44 (0)1782 454499. Service cords and plugs must be free of defects. 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. 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. It reads vacuum (in inches of mercury inHg) relative to the ambient atmospheric pressure so youll get somewhat different readings dependent on the weather. Keep combustibles away from pumps. Price and other details may vary based on product size and color. Plug the pump directly into an outlet. Pre-pregs bring high heat to the mix and potentially lots of extra pressure in an autoclave. If the pump cannot be unplugged directly, contact EHRS for information about lock-out/tag-out before attempting to service the equipment. The exclusive offers are REAL. The pump may not vent into the cabinet interior. This is a very tough and long-lasting hose for room temperature use. Follow all manufacturer recommendations for oil changes and routine maintenance. 3160 Chestnut Street If youre doing bagged wet-layup and especially infusion, you need to have a catch pot between your bag and your pump. Use an oil mist separator (purchased from the pump vendor) to prevent oil loss. If you use thread sealant properly and tighten your threaded connections well, leaking shouldnt be a problem. You can either buy pre-made hoses and add fittings or have them made up by a hose shop locally to your specifications. Do not connect to an extension cord or power strip. Best to tap the holes, but if not itll probably be ok if you drill holes slightly undersized and make the threads engage. Our range includes permanent metal fittings for 'dry side' use as well as disposable plastic fittings for connecting and branching 'wet side' resin hoses. 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. Failure to properly vent the pump can result in contamination of the lab with hazardous chemical vapors. Keep detailed records of all pump maintenance including routine maintenance and vendor-provided services. It sits on top of a strip of sealant tape and the bag goes over on another strip. Large air hose with wire reinforcement or hydraulic hose can work great for this. 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. The picture shows the six most common kinds of hoses youll find in composites shops. Nickel-plated brass reducing bush to reduce female 1/2" BSP to female 1/4" BSP. Maintain trap during the experiment. Liquid Nitrogen condenses oxygen and this may cause an explosion.
See and test specialist products in our on-site demo room. Next in from the left (on the green hose) is my go-to vacuum quick-connect. When in doubt add some bag sealant tape! For most processes, you (hopefully!) Range of nickel plated brass equal T-piece vacuum fittings in male-male and male-female versions. General purpose vacuum fittings in 1/4" and 1/2" BSP threads (the same as 'G' or 'Gas' threads in Europe) can be used to connect vacuum pumps and vacuum equipment in a wide range of configurations. So you place your vacuum fitting inside a secondary piece of 4 tube-bag that has strips of infusion flow media inside. 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. Order and collect any products from our trade counter. Clear wire-reinforced PVC hose is good for this and reasonably inexpensive. Extreme care must be exercised to prevent the introduction of room air into a trap containing liquid nitrogen. Youll just need a way to plug the unused ones. A selection of brass push-fit hose-tail barb connectors for connecting vacuum fittings to a range of hose sizes. Maintain trap during the experiment. Extreme care must be exercised to prevent the introduction of room air into a trap containing liquid nitrogen. For more on vacuum bagging, see: INTRODUCTION TO VACUUM BAGGING. 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 . For all systems involving potentially hazardous materials, vacuum exhaust for must be vented to a laboratory exhaust duct or fume hood. 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. These are called: plates, frogs, vac. Any painting pressure-pot will do as long as the gasket is in good shape. 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. Reinforcement Spring for 8mm ID Vacuum Hose 5m. Let me know if you have opinions! Your hose plan with small local pumps is going to rely less on big hoses and more on manifolds and small hoses. Youre seeing this ad based on the products relevance to your search query. Empty the condenser trap immediately after evaporation is complete to eliminate the possibility that solvent will evaporate as the condenser warms to room temperature. This article is about the stuff between your vacuum pump and your part: the hoses, fittings and connectors. How to build with composite materials: design, tooling, materials, laminating and more.