Probably have to replace the lines that came with, I know the ones on mine were flattening at about 2/3 the scale. | Loretta Lynn. The ultimate pressure should ideally be between - 0.4torr and 0.04torr. //specify random images below. Please be kind and respectful to help make the comments section excellent. A big factor that gives this pump an edge over the others is its detachable resin trap lid. The resin infusion process involves stages where the pump has to simplify and improve its bagging procedure to make things work. The compact structure makes it suitable to use even in small spaces. Most of the cheap vacuum pumps for food packing only pull down to 0.5 bar or so, which is enough to force air out of a flexible bag but only expands bubbles 2x. myimages[1]="../../../images/top-banner/ez50-banner.jpg"
The discussion of mold making and casting objects in various plastic resins. When you dont need the pump for resin infusion it is always wise to empty the disposal catchpot. This pump has a rugged manifold block mounted on a vacuum gauge. Updated: 00/04/25
resin) and a vacuum chamber for flexible materials (eg silicone molds). Many people, due to their lack of experience, connect the resin trap to the vacuum pump incorrectly which leads to vacuum leakage. One can even get rid of bubbles entirely. It is also responsible for maintaining a controlled vacuum level so that the resin gains acceptable strength. They are available under various brand names. Pic here: http://bodgesoc.blogspot.com/2014/06/neracar4.html. According to experts, it is essential to make sure that the size of the molding matches the displacement of the pump. - for PayPal Credit, opens in a new window or tab, - eBay Return policy - opens in a new tab or window, - eBay Money Back Guarantee - opens in a new tab or window, No Interest if paid in full in 6 mo on $99+. I guess warming it up could work. Depending on your requirements, you can pick from the different varieties that offer various speed levels, but the average speed range that you can expect is from 17m3/hr to 600m3/hr. I've read on other posts in this subreddit that beat value vacs is a good one. So if its tried do let us know. How about this for an idea, mix the epoxy IN a vacuum. More than the pump, the resin you are using for infusion should hold its position so that the vacuum takeoff can support the resins entire composite during the process. I dont know what other parts are needed. B2-20120091-4. Wonder which I run out of first, time or money? A vacuum chamber is best or bulk degassing. 
This might normally be a tall order, but [Jasper] recently found that you can buy small battery-powered gadgets designed for sucking the air out of food containers for as little as $5 USD from the usual import sites. The control valves are attached to the ends because the demountable joints come with O-ring seals. He said basically look up how to do it. | Suppliers Seller assumes all responsibility for this listing. Most importantly, you need minimal cleaning to keep the pump safe for years.
Water and solvent vapors can cause porosity making the infusion impure. Might be an interesting experiment though.
mircemk has updated components for the project titled All Band Radio with New Firmware. if (ry==0)
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on Drying and Processing, Started by Burlkraft 22 CFM
I believe Harbor Freight and Princess Auto have similar ones at similar prices if you wanna get one locally. Learn more, Degassing Epoxy Resin On The (Very) Cheap, allows you to construct a simple vacuum chamber for just a few dollars, larger vacuum chambers can be built cheaply at a pinch, https://www.artmolds.com/pressure-pot-vacuum-chamber, https://www.amazon.com/HFS-Brake-Bleeder-Vacuum-Tuner/dp/B00NP60URE, https://www.amazon.co.uk/gp/product/B008O3EM04/ref=ppx_yo_dt_b_asin_title_o00_s01?ie=UTF8&psc=1, http://bodgesoc.blogspot.com/2014/06/neracar4.html, Why Fedora Decided To Give CC0 Licensed Code The Boot, Where Pollution Hits The Road: The Growing Environmental Hazard Of Rubber Tires, The Surprisingly Manual Process Of Building Automotive Wire Harnesses, Biomimetic Surfaces: Copying Nature To Deter Bacteria And Keep Ship Hulls Smooth. :: recirculating water for a vacuum kiln vacuum pump, Question: switching vacuum pump from 3ph to 1ph, Location: Somewhere in the Apalachicola NF. 
| It is specifically designed to handle resin infusions. No Interest if paid in full in 6 months on $99+. | Country Search So I want a pressure pot? myimages2[4]="../../../images/top-banner/behindtheforum.jpg"
It almost has a similar mechanism that air conditioners or refrigerators have. They are rigid enough and will try to stay apart. - You can have as many as you wish
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If you planned everything right that wouldnt be too difficultthen you could release the vacuum, pour into your mold and put under a vacuum or pressure depending on your needs at that point.. A friend of mine pours that liquid glass epoxy over thick wood slabs and creates table tops with it. No idea how they are built for any idea if they can be safely adapted (Id guess probably, but far safer to pick something with a rating giving nice safely margins). 
It's quiet and built decent.
} Once you have one, it removes an impediment to doing things that require one. A lovely idea, certainly possible but over large table top spans the force of pulling even a relatively minor vacuum could warp the ply tops, as thick and stiff as 3/4 is if the table top is big enough it could still sag into the surface.. Considering the sound that vacuum pumps make when they are on, this one can reduce that noise to a great extent. Gasket cut from sheet rubber works fine. Wenling Hongbaoshi Vacuum Equipment Co., Ltd. Hyuweiy(beijing)fluid Equipment Co., Ltd. How to souce products on Alibaba.com effectively? This is possible only in vacuum pumps. I doubt they pull a huge vacuum, but it gets the job done. Once the resin is hardened, air degasses again, but since the resin is hard, it cant create bubbles any more. imagelinks[4]="http://www.ezboardwalk.com/" The trap lid will help you dispose of the contents without any hassle. A+++++ Super Fast Delivery !!! I didnt know those devices would draw enough air for this. Dont want to take away from the hacker in this case. Privacy Policy I've gathered I likely want a two stage? Air-Powered Vacuum Press Kit ::On Sale! Since both the units are quite heavy, it is important that you spend enough time bringing the ends close to each other. Woods even long dried will probably degas badly which on top of the large volume might well outrun the pumps capacity. | So, you should specify the seller about this make and model while buying. Mine is super old 3-4mm thick stainless so despite not having a PSI stamped on it I know it will easily take casting pressures (and Ive left the original pressure relief on for now it will be replaced by a new one once I decide how low I want to set it, I think 40psi is probably optimal using pressure). It is mastic free allowing users to quickly tighten the vacuum connections. The best part is that if you want to build your own version, you only need two parts. It seems you could use a modified magnetic stirrer, that is a bit more 3D than the type you find in labs, and slow it down a bit so the magnet and motor wouldnt become unsynced with each other . | Random Image Link Script- By JavaScript Kit(http://www.javascriptkit.com) Tmall Taobao World Sold by: As the name suggests, it can work wherever there is a single-phase power. The first one is a airtight container large enough to hold the piece youre working on. This method is great for anything smaller than a paperweight, but if youve got something bigger than that, youll need to step up your chamber game. All rights reserved. I had a big box I made into a impromptu vacuum chamber and that wouldnt even fit a coffee table top in it barely functioned just using a domestic vacuum cleaner as the top would flex too freely and ruin the seal Think I was just using 18mm cheap ply with a little poured two part silicone for a gasket. imagelinks2[1]="https://woodlandmills.com/?utm_source=forestryforum&utm_medium=banner&utm_campaign=2021brand" In the long run, you make your own luck good, bad, or indifferent. Im assuming theres some pretty tight limits on the type of resin used to cast too. The vacuum chamber is a small mason jar. Verified purchase: It is essential to keep monitoring the resin level so that the pump doesnt lose pressure at any second. Resin infusion involves achieving maximum vapor and air removal into the bag or mold just before the infusion takes place. random_imglink2() imagelinks2[3]="https://woodlandmills.com/portable-sawmills/?utm_source=forestryforum&utm_medium=banner&utm_campaign=2021sawmills" var imagelinks=new Array() That wouldnt even require a pump. Both the ends need to be flexible so that if you move one component, the other one moves in tandem. It is almost like bringing two similar poles of a magnet together. myimages2[3]="../../../images/top-banner/woodland-ad-3.jpg" - User Information Legal Enquiry Guide, 1999-2022 Alibaba.com. - | Showroom if (ry==0) Press J to jump to the feed. Some resins warm up while setting (some an incredible amount) not sure how weird theyd go with this kind of temp change happening. myimages2[6]="../../../images/top-banner/behindtheforum.jpg" Remember that the larger the chamber is the more time it will take to pump down to a suitable vacuum, so avoid the temptation to use something larger than necessary. With high water vapor tolerance, the single-stage rotary vane vacuum pump eases the pressure allowing the unit to focus on infusion rather than controlling the other parts that coordinate together. There are many more reasons why these pumps are the best for resin infusion: Vacuum pumps come with a variety of features and functions, but if you only require it for resin infusion, you should opt for the single-stage rotary vane variant. This is crucial for the infusion to take place successfully. I found it for $99. Its pretty easy to find the instructions on how to do this with your pot online. Would love to be proved wrong and find it is really practical though! new If you Buy It Now, you'll only be purchasing this item. Terms of Use Learn how your comment data is processed. Pressure is another factor that you need to keep in mind, and this pump provides the appropriate amount that can keep the infusion going for a specific period. Paint pressure tanks work great. onebigoutlet, worked great, used for installing Split Mini AC, good quality,,,good value,,,good price,,,thanks, Verified purchase: Well take a look and remove the review if it doesnt follow our guidelines. Many people prefer to buy the resin trap while purchasing the vacuum. I assume he was using a relatively slow curing epoxy, since any time Ive used resins that set in ~15 minutes, it takes every bit of available time to really degas it in a chamber with an actual vacuum pump. Electrolytes, Theyre What Dehydrated Hackaday Writers Crave! Indeed, Im wondering if its easier to build a pressure pot some how (I have no idea how!) Not sure youd really need the freezer, you can put those type of mason/kilner jars in boiling water for canning, do that and tighten the lid, let cool to room temp. imagelinks[6]="http://www.ezboardwalk.com/" Sandwich the lid with the neoprene washers, followed by the steel ones (obviously with the bolt going through the middle) and tighten it down. We use a similar hand pump for degassing resin at work, with good results. - Christian W. liked Simple Universal Modem. Really comes down to the quality of the ply, and the size of the chamber. I'd prefer to just get a good pne from the start. See more ARKSEN 003PT30173 110V Electric Refrigerant Va 12 CFM 2-Stage Vacuum Pump Rotary Vane Deep HVAC Epoxy Resin Bagging Infusion, - eBay Money Back Guarantee - opens in a new window or tab. Page created in 0.833 seconds with 39 queries. How you going to open it? When [Carl] Says Jump, PCBs Say How High?, CV Based Barking Dog Keeps Home Secure, Doesnt Need Walking. Personnally, I would use a valve to control the flow and a vacuum cleaner. However, it is not 100% soundproof. If you need cheap vacuum you could also use a water aspirator. //specify corresponding links below var ry=Math.floor(Math.random()*myimages2.length) var myimages2=new Array() technology-zoom. vacuum to degas as much as possible, then into a pressure chamber to shrink any remaining bubbles while hardening. Sold by:
Judging by Peter Brown videos, many types of resin either outgas while curing or have a ton of dissolved gasses and can just foam to massive multiples of the volume for long enough to ruin the casting. Alipay myimages2[1]="../../../images/top-banner/woodland-ad-1.jpg" Although it requires occasional cleaning and maintenance and regular oil changes, it is still the pump that meets all the requirements for resin infusion applications. | | Updated: 00/04/25 If you'd like to get the additional items you've selected to qualify for this offer. THANKS !!!!! Which is why he ended up using a pressure pot to minimize and dissolve bubbles instead. He shows his homemade chamber off in the video after the break, and we think youll agree that the change between before and after is pretty dramatic. An old refrigerator compressor makes a brilliant vacuum pump, as well as a high pressure air compressor (92% vacuum and >300psi with one I salvaged from an old fridge put out for garbage collection), I wonder if it would be enough to use a hot container & then whack it in the freezer? It pulled my Grand Cherokee's system down quickly and pegged my gauges. Best example is dice. imagelinks2[6]="https://www.youtube.com/c/TheForestryForum?sub_confirmation=1" Some more features of this pump are: As already mentioned, the connection of the vacuum pump is crucial for resin infusion. 33010002000092 } imagelinks[2]="https://woodmizer.com/us/Sawmill-Blades?utm_source=forestryforum.com&utm_medium=banner&utm_campaign=sawmillblades&utm_term=2022-05-01&utm_content=800x160" Warming it up would accelerate the epoxy cure time, maybe too much? I have indeed made a pressure pot (and vacuum chamber) out of a pressure cooker but that is risky if you dont really really know your stuff. I ordered one day, get it two days later. That said, using vacuum for more than a few seconds achieves about the same, degassing during vacuum, then dissolving air at the higher ambient pressure. Just curious on what people recommend and what brand and model you have that is a good long lasting one. I have used a heavy stainless steel mixing bowl with a 1/2 polycarbonate lid; plumbing fittings to attach to vacuum or to admit air. I guess simplest way to produce vacuum is 3d printed venturi tube, powered by stream of water from garden hose :-), When I cast with clear silicone, it has an incredible 24 hours pot time, so I put my molds into the fridge, and wait; Something went wrong. I'm planning on making my own chamber. Condition: myimages[5]="../../../images/top-banner/cookie-mizer.jpg" This makes the pump leak-tight and easier to use. 1688.com With the pressure, the bubbles simply never formed, as the gas stayed disolved in the resin, or inside whatever he was dipping. Most modern pressure pots seem to be designed around 15psi pressure differential which is a bit low for resin casting from all my reading and tests. With respect to this sentence: but thats a considerable investment for a one-off project, Id say yea, its an investment, not a prohibitively high one though, and once you have it, you may find you use it more often than you ever thought. Using the pipework will only result in trapping the line and it is most likely to develop a leak soon. [Jasper] used a glass jar with a locking lid, which is not only cheap and readily available, but has a decently large internal volume. I know this is an old thread, but FWIW http://www.novalab.org/rockets/mixer.htm shows a vacuum chamber made out of plywood, large enough to hold a Kitchen Aid mixer. That way the only air you would introduce to the mix would be when you poured the resin and hardener into the container, and if you had a large enough vacuum chamber(see Codys Lab), you could even devise a way to pour it under vacuum, then mix.. The backend of the pump has integrated exhaustive filters that control the vibration and noise levels efficiently. | Affiliate, Product Listing Policy Make sure you test this part before purchasing the pump. Yes I use the middle one for storing coffee and the small one for degassing. I finally pulled the trigger and bought this. Whether you're casting models, miniatures, props, jewelry, or anything else, you'll find great tips and tricks here! the vibrations of the compressor are just perfect to degas all those bubbles Using a vacuum chamber on epoxy in a mold like dice just pulls the resin out of the mold with the bubbles most the time, leaving you with 1/2 a part. View cart for details. imagelinks2[4]="https://www.youtube.com/c/TheForestryForum?sub_confirmation=1" I think most of the DIY pressure pots start with the paint pressure tank from Harbor Freight.
new Onetouch //-->. | Really impressive results. One of the reasons why this pump is ideal is it usually avoids composites in high quantities. They avoid air leakage from entering into the laminate. This is crucial because the leakage can reduce the pressure of the infusion significantly. Though I cant find much on ebay of them. John Sutter liked 30MHz spectrum and SDR in a FPGA. function random_imglink2(){ I guess you could use it for pressure as well. This allows them to verify the compatibility of the pump in accordance with the resin. But, dont fall for that trap. But assuming your parts are small enough, [Jasper Sikken] has a great tip that allows you to construct a simple vacuum chamber for just a few dollars. Generally you want to use a pressure pot for materials that set hard (eg. Confused, are you wanting this to vacuum the resin ,or to vacuum the silicone for the mold? Using a pressure cooker and the compressor from an old dorm fridge is pretty cheap and easy vacuum pressure tank. Ideally, the line to the trap that runs from the pump should be flexible. Press question mark to learn the rest of the keyboard shortcuts. Resins also tend to cure much faster at higher temps. Random Image Link Script- By JavaScript Kit(http://www.javascriptkit.com) All you need to do is pop a hole in the lid of your container, hold the device over the hole, and watch the magic. myimages[4]="../../../images/top-banner/ez50-banner.jpg" imagelinks[5]="https://woodmizer.com/Store/Shop/Sawmill-Options/CookieMizer-Clamping-Jig?utm_source=forestryforum.com&utm_medium=banner&utm_campaign=cookiemizer&utm_term=2021-03-09&utm_content=800x160" So, you dont have to worry about arranging for additional power phases to make the pump work. You have to know your cure time with epoxy though so that it doesn't gel too quicky if you are degassing it. Started by schwanee Agree with below. For those with 5/8 use a 3 size 5/8 bolt with 2 5/8x2 steel washers and 2 5/8x2 neoprene washers. After pouring he goes over it with a torch while it is still wet to bring out the bubbles. Pressure pot is best for using resin in silicone molds where you don't have a large open top surface to use a heat gun/torch on. 10 microns The problem with raising the temp is that for every 10 degrees or so(I forget if thats C or F) it halves the cure time. Unlike high-pressure vacuum pumps that need more composite to operate, this variant uses rotary vane technology to substitute that requirement. ry=1 some weird contraption of a foot pump and a old metal pressure cooker? Same goes for silicone, molds are usually made in a larger volume like in a dixie cup or something. Christian W. liked Toshiba T3200SXC fix/upgrade: new PSU, LCD, WiFi. Condition: a series myimages[2]="../../../images/top-banner/BladesFreeShip.jpg" This would be like a pizza over vacuum chamber. You can put your resin in it for a few minutes in the mixing cup to pull some of the bubbles out, but watch it to make sure the resin doesn't flow out of the top of the cup. on General Board. //specify random images below. Apologies, I meant to say that when you replace the stir stick, you replace it with a bolt and a setup of washers and rubber gasket washers. Tags: In that case I used a 12V tyre inflator with a tube attached to the air inlet. Adixen. Luckily even larger vacuum chambers can be built cheaply at a pinch. If you are purchasing a vacuum pump for resin infusion for the first time, it is best to invest in a model that has a standard pumping speed. (Comment Policy). Over 200+ free JavaScripts here!
(I actually added the tube some time ago, so that I could use it to pump argon in to a shock absorber) Sometimes people use rigid pipework as a handle. mircemk has added details to All Band Radio with New Firmware. var myimages=new Array()
The best way to prevent this is to put the parts in a vacuum chamber so all the air works its way out before the epoxy cures, but thats a considerable investment for a one-off project. random_imglink()
I couldn't be happier. Obviously, the second component is the vacuum pump itself. Epoxy Resin Vacuum Pump High Pressure Vacuum Pump TRD Series 0.5Pa High Pressure Air Composite Epoxy Resin Infusion Vacuum Pump, Epoxy Resin Pump Peristaltic Pump Peristaltic Epoxy Resin Dosing Pump, Epoxy Resin Vacuum Pump Composite Epoxy Resin Infusion Vacuum Pump High Pressure Air Composite Epoxy Resin Infusion Vacuum Pump, Check out top 10 proven tips from 30+ experienced buyers, Epoxy Resin Pump Epoxy Resin Injection Pump Grouting Machine Parts, Epoxy Resin Pump Ss316 Chemical Pump Transport Epoxy Resin Alkyd Solvent SS316 Centrifugal Pump For Chemical, China Factory High Pressure two-component waterproof Epoxy Resin PU Foam grouting injection pump, Portable 2X A Series Air Suction Double Stage For Epoxy Resin Defoaming Rotary Vane Vacuum Pump, epoxy resin adhesive vacuum pump for milking machine, 2X Series Air Suction Double Stage Rotary Vane Vacuum Pump For Epoxy Resin Defoaming, Two cups double component grouting materials epoxy resin injection pump, Vacuum degassing pump 6 Gallon Silicone Resin Degassing Vacuum Chamber for raw material, Water Ring Vacuum Pump Double Stage Rotary Vane Vacuum Pump Epoxy Resin Vacuum Pump, stainless steel positive displacement pump high efficiency epoxy resin adhesive transfer pump, Air compressor resin infusion vacuum pump, Hospital vacuum pump 2X-15A 2.2kw epoxy resin vacuum pump double stage rotary vane vacuum pump, Vacuum degassing chamber 3gallon for resin degassing vacuum pump, RUTH IE-02 Electric Epoxy Resin Injection Pump, Transformer dry vacuum pump for 55.5KW Roots dry screw vacuum pump system made in China, Kaida epoxy resin defoaming solution with vacuum pump and stainless steel vacuum chamber, Epoxy Resin Polyurethane For Injection Pump, Double Stage 2X Air Suction Rotary Vane Vacuum Pump For Epoxy Resin Defoaming, Vacuum pump and vacuum degassing chamber kit for raw material, resin degassing and defoaming, Portable Double Epoxy Resin Grouting Injection Pump For Sealing, Guangzhou BDLF Factory high quality Construction Machinery Waterproof Epoxy and PU Foam injection grouting machine pump, high pressure portable epoxy injection pump, Infusion Resin Machine With High Pressure, Low-noise equal-pitch energy-saving dry-type oil-free pump dry-type 10.5KW screw Roots high vacuum unit, 2X 2XZ Double Stage Belt Drive Oil Rotary Vane Vacuum Pump for Epoxy Resin Defoaming, Popular Sale double component resin injection pump, China Factory high quality wireless remote control hydrophoblic polyurethane injection pump epoxy injection pump, 304 Stainless steel Vacuum chamber with vacuum pump, Resin Infusion Machine Polyurethane Epoxy, Vacuum Pump Epoxy Resin Loader Infusion System, Professional epoxy polyurethane injection pump, Alibaba.com Site: International - Espaol - Portugus - Deutsch - Franais - Italiano - - P - - - - - Trk - Nederlands - ting Vit - Indonesian - , AliExpress I found this bad boy on amazon but there are no reviews. But I'm really torn on what pump to get. If youre trying to get a perfectly clear finish, the last thing you want is a bunch of microscopic bubbles frozen in time. Aaron Shaw liked Super simple foam cutter. Also with that size box and timbers inside its possible you would struggle to actually pull a vacuum at all. But I dont always, sometimes I want to keep some bubbles ;o), I bought a set of these vacuum containers when I wanted to try casting pewter into heat-resistant silicone.
Intellectual Property Protection An oil-sealed, single-stage rotary vane vacuum pump is ideal for resin infusion. I have been pondering if you could make a good enough vacuum chamber out of a couple sheets of 3/4 plywood coated with that epoxy stuff separated by 28s coated with that stuff. imagelinks2[2]="https://woodlandmills.com/product/hm130/?utm_source=forestryforum&utm_medium=banner&utm_campaign=hm130max"
| Really cool technique for small scale vacuum. I seem to recall in one of his videos he explained the switch, mostly because the vaccum method would make such a mess if you werent paying attention and youd often get bubbles forming after forming the vaccum sometimes far into the setting cycle. I never met an air conditioner I didn't like. Sawing part time mostly urban logs -St. Louis/Warrenton, Mo. Hackaday Podcast 179: Danger Chess, Corona Motors, An Omni-Walker, And A Fast Talking Telescope, This Week In Security: Symbiote, Smart Locks, And CosmicStrand, Your Own Engineering Workstation, With Mame. Protecting The Hughes H4 Hercules With Beach Balls? Vacuum pumps tend to bypass this problem efficiently allowing the infusion to take place without any interruption. The Forestry Forum is sponsored in part by:
function random_imglink(){
Im using such setup to pull air bubbles out of the supply hose (RO pumps do a terrible job when having to pressurise air, they just want to pump water). This site uses Akismet to reduce spam. You want to put the resin into a positive air pressure chamber to reduce bubbling. on Drying and Processing, Started by Zeke I'm looking into pumps. document.write('')
You can replace the stir stick that penetrates the middle of the lid, cut it off (cut the part inside the tank) or loosen the screws holding it in place and slide it up out of the way. Copyright 1995-2022 eBay Inc. All Rights Reserved.
Yes, it is a tempting option, especially when you are finding it hard to make both ends meet. I watch a YouTube video of someone doing this stuff professionally a while back, they did both. imagelinks[3]="https://woodmizer.com/us/?utm_source=forestryforum.com&utm_medium=banner&utm_campaign=40th&utm_term=2022-02-01&utm_content=800x160" I bought cheap vacuum pump and chamber (~$150) for a single project I needed to cast a silicon part, and Ive used it many times since. Project: V2? Over 200+ free JavaScripts here! {"modules":["unloadOptimization","bandwidthDetection"],"unloadOptimization":{"browsers":{"Firefox":true,"Chrome":true}},"bandwidthDetection":{"url":"https://ir.ebaystatic.com/cr/v/c1/thirtysevens.jpg","maxViews":4,"imgSize":37,"expiry":300000,"timeout":250}}, Add to cart to save with this special offer. var ry=Math.floor(Math.random()*myimages.length) I'm new to this and really cant afford it so I'm trying to by once, cry once. myimages[3]="../../../images/top-banner/wm-40-years.jpg" Im surprised as well. /* //specify corresponding links below See this for a discussion: https://www.artmolds.com/pressure-pot-vacuum-chamber. Its made a huge difference, especially if I keep the silicone in the fridge for a while to give it time to settle down. Make a gusset around the front that could hold an O ring or some kind of a seal and use some bolts to hold it on. You can have as many as you wish Login with username, password and session length. Vacuum pumps are ideal for this kind of setting because of their wide speed and pressure range. ry=1 Ningbo Boyu Waterproof Material Co., Ltd. Anhui Tenglong Pump And Valve Manufacturing Co., Ltd. Guangzhou Bdlf Building Materials Co., Ltd. Beijing Long Way Times Science & Technology Co., Ltd. Nantong Zhongtian Machinery Manufacturing Co., Ltd. Wenling Sanco Mechanical & Electrical Co., Ltd. Shanghai Ruth Constructional Materials International Trading Co., Ltd. Xiamen Taixing Machinery& Electronic Co., Ltd. Guangzhou Jingjin Building Materials Co., Ltd.