Thanks for the comment.
The nozzle is threaded into the body and may be removed. Note: Air-Vacuum pump: Includes 1/2" ACME (R134a) connector. Venturi systems or the hand pumps are never going to get anywhere near that level. The CV30-HS-TT is a single stage venturi with no moving parts. Its also available from Harbor Freight. Thus any air line contaminants easily clear the generator without clogging or building up.
Fabulous! One problem I had was a single hair was across the rim of the container and it prevented me from pulling and "maintaining" a high vacuum. 120 GPM @ 1 1/4 hose. At 30mmHg you're seeing about -0.6psi, not a lot at all but should be sufficient to pull bubbles from a sufficiently thin mix.
Greetings; If you have an application in the semiconductor industry or handling corrosize materials please contact a Millibar engineer to discuss your requirements. on Introduction. This eliminates the risk of debris blocking the suction pipe and / or damaging the ejector. Millibar brings a generation of practical experience applying vacuum technology, and serves up the best of the best solutions for factory automation, robotics, material handling, packaging and many more applications. Capable of 90% (27Hg) vacuum and a maximum vacuum flow rate of 0.21 SCFM (6 l/min).
Plastic container for the vacuum chamber - from the "Dollar Store" (1 dollar).2. The CV20-HS-TT is a single stage venturi with no moving parts. A static O-ring made of Viton seals the nozzle and body. Pulsing changes the shape of a bubble in the medium and moves it to the surface faster. My venturi is rated for 29.7 Mercury. It is huge. This project shows you how to make a small vacuum degassing apparatus for under 20 dollars. View cart for details. Complete, electrically-controlled venturi pumps, for installation near to suction pads. 9 years ago The item you've selected was not added to your cart. Millibar manufactures a wide variety of custom Teflonpumps with most having no seals at all.
on Introduction. Quiet Operation: All multi-venturi pumps come equipped with the Vac Cube straight through design silencers. Hose size will not change anything, but a tip to keep a soft hose from collapsing is to stick a length of spring inside. Once you pull a vacuum, the diameter of the hose should not make any difference, the vacuum is the same everywhere in a closed system. Nozzles and all port threads are metal not plastic or just inserts. The ejector connected to the high pressure stainless steel pipe is centered in front of the suction pipe and secured with flat, stainless steel bars. Multi Venturi Design: Vac Cubes design of vacuum generators incorporates a series of venturi nozzles. Cheers. I am using a 4.5 hp 25 gallon. It is made using virgin PTFE for both the nozzle and body. Venturi vacuum pumps are used for all normal vacuum gripping applications.Compact and light, venturis may be installed close to the suction pads: no line power loss and a minimum volume to empty, resulting in short response times and minimum energy consumption. You can also hand pump and clamp the line for longer durations as well as pulse the vacuum. The quick connect for the other end is not necessary but you can get it at any hardware store. Hope that helps and thanks for the comments! We use cookies to ensure that we give you the best experience on our website. Its the simple things in life. If you can pull and maintain a vacuum (test with a hose clamp) then try "ANY" available source of continuous vibration while pulling the vacuum, this can literally walk the bubbles up. I've wanted one of these things for years and it turns out I had the stuff all along?! Read More, Millibar, Inc Compact Size: Allows pump placement closer to the point of use. cool instructable, 12 years ago The container in this image has strong corners, a strong rim and is deep enough to hold the small molds that we want to the pull bubbles out of (de-gas).The short segment of hose has to be rigid enough so that it won't collapse under the vacuum. Anything that heats up, pinches, cuts, squeezes or causes traumatic, caustic or thermal injury.We are sharing our experience, not telling you to do it.If you choose to try this, then it is at your own risk!No really, we're not kidding about this. 536 E Tarpon Avenue - Suite #5 - Tarpon Springs, FL 34689, Phone: 727-944-3337 | Fax: 727-945-0079 | Email: info@vac-cube.com. on Introduction. The bubbles leave behind void spaces that can spoil an otherwise flawless model or part. Its allot quieter.We used to call is a Wangensteen suction apparatus and it works pretty well for low viscosity fluid degassing.http://en.wikipedia.org/wiki/Wangensteen_suctionBest of luck! Fax: (508) 589-6033, 2019 Millibar, Inc. All rights reserved, pumps with most having no seals at all. You can pull a pretty good vacuum based on the height of the column. They are available for about $15. It is made using virgin PTFE for both the nozzle and body. Using vacuum systems or compressors.2. I see you have a tube of E6000 glue in the first pic. I couldn't live without that stuff, it is the best. They fit on the end of your sink faucet . Silencers muffle exhausted air resulting in low noise levels in the 60-65db range, without creating back pressure. If you just want long duration, low vacuum then try using the old Water column trick first. Power-tools that you never read the instructions for.3. The exhaust port is threaded to allow exhaust gases and liquids to be plumbed away. The effectiveness depends on viscosity, area and thickness. Follow all safety guidelines, including but not limited to:1. Other Hydraulics, Pneumatics, Pumps & Plumbing, - eBay Money Back Guarantee - opens in a new window or tab, cleared payment - opens in a new window or tab, Learn more about earning points with eBay Mastercard, - eBay Return policy - opens in a new tab or window, - eBay Money Back Guarantee - opens in a new tab or window. Hudson, MA 01749, Phone Numbers It is made using virgin PTFE for both the nozzle and body. *Vacuum Pump specifications: A Venturi-type vacuum pump is connected to a compressor to supply the airflow that creates the vacuum. The exhaust port is threaded to allow exhaust gases and liquids to be plumbed away. i have had several unsuccessful trips to the hardware store! Another option wound be to combine the vacuum method with pressurisation to approx 50psi, using a different container of course. Good points! Project Team:Richard H. Siderits MDChristoper Sereni MSIIIVarun Singh - Investigational Pathology TeamRemoving bubbles, when you're making blanks to be used for machining plastic parts or casting models from Room Temperature Vulcanization (RTV) silicone rubber is an important step.
The threaded end is only threaded on one end, the other end of the connector has a bayonet tip that goes into the tube. Capable of 90% (27Hg) vacuum and a maximum vacuum flow rate of 2.22 SCFM (63 l/min). Copyright 1995-2022 eBay Inc. All Rights Reserved. Vac-cubes multi-stage vacuum ejectors/venturi ejectors generate no RF noise effect in electrical and electronic systems, which makes them much more desirable over other types of vacuum generators. Commercial degassers can be expensive. on Introduction. Call:(508) 488-9870 The nozzle is threaded into the body and may be removed. Capable of 90% (27Hg) vacuum and a maximum vacuum flow rate of 3.88 SCFM (110 l/min). A static O-ring made of Viton seals the nozzle and body. The exhaust port is threaded to allow exhaust gases and liquids to be plumbed away. All Metal Construction: Manifold Mounted Multi-Venturi Pumps uses metal in all parts that are subject to wear, unlike foreign imports. Also be patient, under a vacuum the bubbles may be almost impossible to see (not like the big ones outside a vacuum. thanks for the great tutorial! Semi-rigid plastic hose and air-hose connectors - from the local hardware store (4 dollars).3. The exhaust port is threaded to allow exhaust gases and liquids to be plumbed away. All tools that you never learned to use properly.4. The CV05-HS-TT is a single stage venturi with no moving parts. No Moving Parts: Expect extra long pump life with no lubrication required. I tend to use this on shallow molds with larger surface areas. Shorter air lines cost less and quicken response time. on Introduction, NICE!Never even thought of it.You can also pull a low steady vacuum with a Wangensteen or gravity water suction apparatus. It is made using virgin PTFE for both the nozzle and body. The CV10-HS-TT is a single stage venturi with no moving parts. 12 years ago Principle of Venturi Pumps: (Venturi Ejectors) When compressed air is forced through a conical nozzle, its velocity increases and a principle discovered by a 18th century physicist G. B. Venturi, can be used to generate vacuum economically without a single moving part. You might also heat the base end of a drill and melt it into the side of the plastic container. A static O-ring made of Viton seals the nozzle and body. i am unfamiliar with what is standard for this type of thing. Vacuum Venturi Generator Nozzle Ejector Pneumatic Fitting CV-10HS - 30HS New, {"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}}. Reply Normally, no special pre filters are required because the venturi nozzles are aligned to allow "straight through" air flow. I am using a 1/4 inch hose. Tube/Tube push fit, 4-12mm tube, 0.01 bar cracking pressure, cheap. Texas Municipal Equipment, All rights reserved, Replaceable, threaded stainless steel ejector, Min. If it's greater than, or at the limit of what you can pull than the pump will be working very hard just to overcome the spring tension on the valve and the valve will only open momentarily until it builds sufficient suction again. I couldn't get it to degass anything. Cheers; USB-Sewer Equipment Corporation utilizes one concentrated water jet (one thick bundled jet provides a much higher efficiency than six small, thin water jets). Nice Instructable! Each nozzle has a progressively larger orifice selected to extract the maximum amount of energy from the compressed air, while optimizing the levels of vacuum generated. This small "Hand-vac" will pull enough of a vacuum to pull the bubbles out of most resins and RTV silicone molds and still costs under 20 dollars. This will assure that the nozzle fits snugly.When you have a hole in the side of the container, screw in the connector and then hot-glue or rubber cement the nozzle in place from the INSIDE. The only thing that you need to use the apparatus is a standard air compressor. Venturi nozzles, also known as ejector nozzles use the water coming from a pressurized hose. Most have upper psi limits of about 90 but thats for safety not performance. Our structure taps over 30 years of practical experience at every level of vacuum design, engineering and manufacturing. The water is smoothly turned around into an ejector thus creating a vacuum in the suction barrel. Quick Change Valves: Valves can be replaced using only a screw driver and without removing the pump from its mounted position. The CV25-HS-TT is a single stage venturi with no moving parts. Capable of 90% (27Hg) vacuum and a maximum vacuum flow rate of 5.65 SCFM (160 l/min).
I made one exactly like this, but I used a stainless steel can with the glass see through lid that is sealed. Seller assumes all responsibility for this listing. The nozzle is threaded into the body and may be removed. I bought a check valve and it is a half inch. Does the size of the hose make a difference in the amount of pressure it is going to pull. I am wondering if that is causing the pull to be weak. With the check valves, check what the cracking pressure (effort required to open the valve) is. Remember to wet the fittings with soap water to get a good and easy fit. A cheaper source of vacuum for this type of project is a "Water Aspirator". This fitting has to be air-tight. Image 1: Example of two part plastic resin available through Micro-Mark or Room Temperature Vulcanization (RTV) silicone rubber two part mold mixture available from PolytekImage 2: Example of a flawless, bubble free, plastic blank made by pouring the liquid two part plastic resin into a PVC pipe that the inner surfaces have been coated with a layer of Vaseline for release agent.Image 3: Here is an example of a two part plastic resin "blank" that was degassed. 1. Instead of using a drill, you might consider heating the connector and melting your way through the plastic container. Hope this helps. The CV15-HS-TT is a single stage venturi with no moving parts. Alternately use a hard poly tube such as that you'd find on a drink dispensing machine. Millibar manufactures PTFE (Teflon) venturi vacuum pumps for a wide range of applications involving corrosive chemicals and high temperatures. Share it with us! If you have an application in the semiconductor industry or handling corrosize materials please contact a Millibar engineer to discuss your requirements. Combined with ease of installation, control and maintenance, it means that your investment is far less when you have Vac Cubes. 
Hot glue gun. An interlocking lid (like the one I used) and a fine layer of Vaseline around the rim may help. I used 3/8 tubing and standard fittings. See below:http://forum.motorcycle-usa.com/attach.aspx/11156/wangenstein.JPG. I remember that episode too, DIY for the win! Is that a 1/2 inch. I used these to de-gass jewelry molds for years. All you need is two 1 gallon jugs, tape, latex tubing and some water. These pumps have no moving parts and only one Viton seal. 
The exhaust port is threaded to allow exhaust gases and liquids to be plumbed away. The exhaust port is threaded to allow exhaust gases and liquids to be plumbed away. 4.4 hp air compressor 25 gallon. A static O-ring made of Viton seals the nozzle and body. A static O-ring made of Viton seals the nozzle and body. The pump is constructed of only Virgin (white) Teflon. The only item that needs to be replaced are the standard viton flapper valves. In regards to vacuum, you can't pull more than -1atm/-14.7psi, thats an absolute. It is made using virgin PTFE for both the nozzle and body. The smaller the diameter tubing, the longer it takes to pull the vacuum. and as the water rushes through it a port on the side of it pulls a vacuum, Light Weight Construction: Most models weigh less then two pounds providing maximum flexibility and mounting ease.
The nozzle is threaded into the body and may be removed. Note: Air-Vacuum pump: Includes 1/2" ACME (R134a) connector. Venturi systems or the hand pumps are never going to get anywhere near that level. The CV30-HS-TT is a single stage venturi with no moving parts. Its also available from Harbor Freight. Thus any air line contaminants easily clear the generator without clogging or building up.
Fabulous! One problem I had was a single hair was across the rim of the container and it prevented me from pulling and "maintaining" a high vacuum. 120 GPM @ 1 1/4 hose. At 30mmHg you're seeing about -0.6psi, not a lot at all but should be sufficient to pull bubbles from a sufficiently thin mix. Greetings; If you have an application in the semiconductor industry or handling corrosize materials please contact a Millibar engineer to discuss your requirements. on Introduction. This eliminates the risk of debris blocking the suction pipe and / or damaging the ejector. Millibar brings a generation of practical experience applying vacuum technology, and serves up the best of the best solutions for factory automation, robotics, material handling, packaging and many more applications. Capable of 90% (27Hg) vacuum and a maximum vacuum flow rate of 0.21 SCFM (6 l/min).
Plastic container for the vacuum chamber - from the "Dollar Store" (1 dollar).2. The CV20-HS-TT is a single stage venturi with no moving parts. A static O-ring made of Viton seals the nozzle and body. Pulsing changes the shape of a bubble in the medium and moves it to the surface faster. My venturi is rated for 29.7 Mercury. It is huge. This project shows you how to make a small vacuum degassing apparatus for under 20 dollars. View cart for details. Complete, electrically-controlled venturi pumps, for installation near to suction pads. 9 years ago The item you've selected was not added to your cart. Millibar manufactures a wide variety of custom Teflonpumps with most having no seals at all.
on Introduction. Quiet Operation: All multi-venturi pumps come equipped with the Vac Cube straight through design silencers. Hose size will not change anything, but a tip to keep a soft hose from collapsing is to stick a length of spring inside. Once you pull a vacuum, the diameter of the hose should not make any difference, the vacuum is the same everywhere in a closed system. Nozzles and all port threads are metal not plastic or just inserts. The ejector connected to the high pressure stainless steel pipe is centered in front of the suction pipe and secured with flat, stainless steel bars. Multi Venturi Design: Vac Cubes design of vacuum generators incorporates a series of venturi nozzles. Cheers. I am using a 4.5 hp 25 gallon. It is made using virgin PTFE for both the nozzle and body. Venturi vacuum pumps are used for all normal vacuum gripping applications.Compact and light, venturis may be installed close to the suction pads: no line power loss and a minimum volume to empty, resulting in short response times and minimum energy consumption. You can also hand pump and clamp the line for longer durations as well as pulse the vacuum. The quick connect for the other end is not necessary but you can get it at any hardware store. Hope that helps and thanks for the comments! We use cookies to ensure that we give you the best experience on our website. Its the simple things in life. If you can pull and maintain a vacuum (test with a hose clamp) then try "ANY" available source of continuous vibration while pulling the vacuum, this can literally walk the bubbles up. I've wanted one of these things for years and it turns out I had the stuff all along?! Read More, Millibar, Inc Compact Size: Allows pump placement closer to the point of use. cool instructable, 12 years ago The container in this image has strong corners, a strong rim and is deep enough to hold the small molds that we want to the pull bubbles out of (de-gas).The short segment of hose has to be rigid enough so that it won't collapse under the vacuum. Anything that heats up, pinches, cuts, squeezes or causes traumatic, caustic or thermal injury.We are sharing our experience, not telling you to do it.If you choose to try this, then it is at your own risk!No really, we're not kidding about this. 536 E Tarpon Avenue - Suite #5 - Tarpon Springs, FL 34689, Phone: 727-944-3337 | Fax: 727-945-0079 | Email: info@vac-cube.com. on Introduction. The bubbles leave behind void spaces that can spoil an otherwise flawless model or part. Its allot quieter.We used to call is a Wangensteen suction apparatus and it works pretty well for low viscosity fluid degassing.http://en.wikipedia.org/wiki/Wangensteen_suctionBest of luck! Fax: (508) 589-6033, 2019 Millibar, Inc. All rights reserved, pumps with most having no seals at all. You can pull a pretty good vacuum based on the height of the column. They are available for about $15. It is made using virgin PTFE for both the nozzle and body. Using vacuum systems or compressors.2. I see you have a tube of E6000 glue in the first pic. I couldn't live without that stuff, it is the best. They fit on the end of your sink faucet . Silencers muffle exhausted air resulting in low noise levels in the 60-65db range, without creating back pressure. If you just want long duration, low vacuum then try using the old Water column trick first. Power-tools that you never read the instructions for.3. The exhaust port is threaded to allow exhaust gases and liquids to be plumbed away. The effectiveness depends on viscosity, area and thickness. Follow all safety guidelines, including but not limited to:1. Other Hydraulics, Pneumatics, Pumps & Plumbing, - eBay Money Back Guarantee - opens in a new window or tab, cleared payment - opens in a new window or tab, Learn more about earning points with eBay Mastercard, - eBay Return policy - opens in a new tab or window, - eBay Money Back Guarantee - opens in a new tab or window. Hudson, MA 01749, Phone Numbers It is made using virgin PTFE for both the nozzle and body. *Vacuum Pump specifications: A Venturi-type vacuum pump is connected to a compressor to supply the airflow that creates the vacuum. The exhaust port is threaded to allow exhaust gases and liquids to be plumbed away. i have had several unsuccessful trips to the hardware store! Another option wound be to combine the vacuum method with pressurisation to approx 50psi, using a different container of course. Good points! Project Team:Richard H. Siderits MDChristoper Sereni MSIIIVarun Singh - Investigational Pathology TeamRemoving bubbles, when you're making blanks to be used for machining plastic parts or casting models from Room Temperature Vulcanization (RTV) silicone rubber is an important step.
The threaded end is only threaded on one end, the other end of the connector has a bayonet tip that goes into the tube. Capable of 90% (27Hg) vacuum and a maximum vacuum flow rate of 2.22 SCFM (63 l/min). Copyright 1995-2022 eBay Inc. All Rights Reserved. Vac-cubes multi-stage vacuum ejectors/venturi ejectors generate no RF noise effect in electrical and electronic systems, which makes them much more desirable over other types of vacuum generators. Commercial degassers can be expensive. on Introduction. Call:(508) 488-9870 The nozzle is threaded into the body and may be removed. Capable of 90% (27Hg) vacuum and a maximum vacuum flow rate of 3.88 SCFM (110 l/min). A static O-ring made of Viton seals the nozzle and body. The exhaust port is threaded to allow exhaust gases and liquids to be plumbed away. All Metal Construction: Manifold Mounted Multi-Venturi Pumps uses metal in all parts that are subject to wear, unlike foreign imports. Also be patient, under a vacuum the bubbles may be almost impossible to see (not like the big ones outside a vacuum. thanks for the great tutorial! Semi-rigid plastic hose and air-hose connectors - from the local hardware store (4 dollars).3. The exhaust port is threaded to allow exhaust gases and liquids to be plumbed away. All tools that you never learned to use properly.4. The CV05-HS-TT is a single stage venturi with no moving parts. No Moving Parts: Expect extra long pump life with no lubrication required. I tend to use this on shallow molds with larger surface areas. Shorter air lines cost less and quicken response time. on Introduction, NICE!Never even thought of it.You can also pull a low steady vacuum with a Wangensteen or gravity water suction apparatus. It is made using virgin PTFE for both the nozzle and body. The CV10-HS-TT is a single stage venturi with no moving parts. 12 years ago Principle of Venturi Pumps: (Venturi Ejectors) When compressed air is forced through a conical nozzle, its velocity increases and a principle discovered by a 18th century physicist G. B. Venturi, can be used to generate vacuum economically without a single moving part. You might also heat the base end of a drill and melt it into the side of the plastic container. A static O-ring made of Viton seals the nozzle and body. i am unfamiliar with what is standard for this type of thing. Vacuum Venturi Generator Nozzle Ejector Pneumatic Fitting CV-10HS - 30HS New, {"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}}. Reply Normally, no special pre filters are required because the venturi nozzles are aligned to allow "straight through" air flow. I am using a 1/4 inch hose. Tube/Tube push fit, 4-12mm tube, 0.01 bar cracking pressure, cheap. Texas Municipal Equipment, All rights reserved, Replaceable, threaded stainless steel ejector, Min. If it's greater than, or at the limit of what you can pull than the pump will be working very hard just to overcome the spring tension on the valve and the valve will only open momentarily until it builds sufficient suction again. I couldn't get it to degass anything. Cheers; USB-Sewer Equipment Corporation utilizes one concentrated water jet (one thick bundled jet provides a much higher efficiency than six small, thin water jets). Nice Instructable! Each nozzle has a progressively larger orifice selected to extract the maximum amount of energy from the compressed air, while optimizing the levels of vacuum generated. This small "Hand-vac" will pull enough of a vacuum to pull the bubbles out of most resins and RTV silicone molds and still costs under 20 dollars. This will assure that the nozzle fits snugly.When you have a hole in the side of the container, screw in the connector and then hot-glue or rubber cement the nozzle in place from the INSIDE. The only thing that you need to use the apparatus is a standard air compressor. Venturi nozzles, also known as ejector nozzles use the water coming from a pressurized hose. Most have upper psi limits of about 90 but thats for safety not performance. Our structure taps over 30 years of practical experience at every level of vacuum design, engineering and manufacturing. The water is smoothly turned around into an ejector thus creating a vacuum in the suction barrel. Quick Change Valves: Valves can be replaced using only a screw driver and without removing the pump from its mounted position. The CV25-HS-TT is a single stage venturi with no moving parts. Capable of 90% (27Hg) vacuum and a maximum vacuum flow rate of 5.65 SCFM (160 l/min).
I made one exactly like this, but I used a stainless steel can with the glass see through lid that is sealed. Seller assumes all responsibility for this listing. The nozzle is threaded into the body and may be removed. I bought a check valve and it is a half inch. Does the size of the hose make a difference in the amount of pressure it is going to pull. I am wondering if that is causing the pull to be weak. With the check valves, check what the cracking pressure (effort required to open the valve) is. Remember to wet the fittings with soap water to get a good and easy fit. A cheaper source of vacuum for this type of project is a "Water Aspirator". This fitting has to be air-tight. Image 1: Example of two part plastic resin available through Micro-Mark or Room Temperature Vulcanization (RTV) silicone rubber two part mold mixture available from PolytekImage 2: Example of a flawless, bubble free, plastic blank made by pouring the liquid two part plastic resin into a PVC pipe that the inner surfaces have been coated with a layer of Vaseline for release agent.Image 3: Here is an example of a two part plastic resin "blank" that was degassed. 1. Instead of using a drill, you might consider heating the connector and melting your way through the plastic container. Hope this helps. The CV15-HS-TT is a single stage venturi with no moving parts. Alternately use a hard poly tube such as that you'd find on a drink dispensing machine. Millibar manufactures PTFE (Teflon) venturi vacuum pumps for a wide range of applications involving corrosive chemicals and high temperatures. Share it with us! If you have an application in the semiconductor industry or handling corrosize materials please contact a Millibar engineer to discuss your requirements. Combined with ease of installation, control and maintenance, it means that your investment is far less when you have Vac Cubes. Hot glue gun. An interlocking lid (like the one I used) and a fine layer of Vaseline around the rim may help. I used 3/8 tubing and standard fittings. See below:http://forum.motorcycle-usa.com/attach.aspx/11156/wangenstein.JPG. I remember that episode too, DIY for the win! Is that a 1/2 inch. I used these to de-gass jewelry molds for years. All you need is two 1 gallon jugs, tape, latex tubing and some water. These pumps have no moving parts and only one Viton seal. The exhaust port is threaded to allow exhaust gases and liquids to be plumbed away. The exhaust port is threaded to allow exhaust gases and liquids to be plumbed away. 4.4 hp air compressor 25 gallon. A static O-ring made of Viton seals the nozzle and body. A static O-ring made of Viton seals the nozzle and body. The pump is constructed of only Virgin (white) Teflon. The only item that needs to be replaced are the standard viton flapper valves. In regards to vacuum, you can't pull more than -1atm/-14.7psi, thats an absolute. It is made using virgin PTFE for both the nozzle and body. The smaller the diameter tubing, the longer it takes to pull the vacuum. and as the water rushes through it a port on the side of it pulls a vacuum, Light Weight Construction: Most models weigh less then two pounds providing maximum flexibility and mounting ease.