side channel blower vs centrifugal blower
Belt-drive type ring blower. Highly effective and affordable, yet robust and reliable, we supply a range of centrifugal fan blowers from the worlds most trusted manufacturers, that are rigorously tested for performance and are backed by solid warranties. Side Channel Blower, Vacuum Blower, Regenerative Blower manufacturer / supplier in China, offering R17 3kw Vacuum Pump Air Blower Vortex Pump Ring Blower, New 48, 000 BTU Outdoor Patio Heater Propane Standing Lp Gas CSA, Steel with Wheels, Glass Tube Gas Outdoor Heater for Swimming Pool Gas Patio Heaters and so on. The impeller is mounted directly on the shaft of the motor and, together with the specially shaped housing, forms the side channel. SIDE CHANNEL BLOWERS. Gas powered blowers will provide the most powerful leaf blowing gusts, but they tend to be heavy and loud. There are many application of ring blowers not only above picture. Application Areas. If the discharge valve is closed, positive displacement blowers will continue to flow and could burst the line. Our goal is to provide customers with the highest quality and competitive price! Typical Characteristic Side Channel Blowers. SIDE CHANNEL BLOWERS Side channel blowers (sometimes called a vacuum pump or regenerative blower) are air delivery systems that produce relatively high air flow (when compared to compressed air) and much higher pressure capabilities than traditional centrifugal type … With our rich knowledge & experience of pumps and blowers industry, we, TURBO BLOWER MANUFACTURER have established ourselves as most reliable manufacturer supplier, trader and exporter of Twin Lobe Blower, Industrial Centrifugal Blower, Side Channel Blowers, Regenerative Ring Blowers, Flame Proof Side Channel Blower, High & Rotary Vacuum Pump, Turbine Blowers, Centrifugal Blower, … This rotor fits into the flute of a second rotor. Choose the right Blowers with air pressure and air flow. email@example.com, By firstname.lastname@example.org In Information On April 27, 2017. At Pump Solutions we have a range of side channel vacuum pumps for water supply, industrial, engineering, agriculture and marine applications. HTB125-704 High temperature resistance air centrifugal fan Dongguan Jieming Electric Tech Co., Ltd. E-mail: email@example.com Tel: +86 769 2166 1466 Fax: +86 769 2166 1466 Whatsapp : +86 137 9022 9580 Centrifugal Blower / Industrial Centrifugal Blower; Turbo Side Channel Blower; Medium Pressure Blower; Ring & Side Channel Blower; Turbine Blower . Side Channel Exhausters: 50/60Hz blower achieves pressure of -450 hPa(g) & flow rates of 2000m³/hr. One specific kind of centrifugal blower is called a multistage centrifugal blower. Savio Side Channel Blower and Multistage Blower. Various components are used in safety features for systems with vacuum pumps and compressors. DHB 940C 025 side channel blower. Blower Assessories. The unit can be mounted in any position, horizontally or vertically. Ring blower VS Roots Blower comparison for your reference. In an attempt to repair a water motor, one brother spun a motor’s shaft, and this caused the impellers to spin, creating so much air that the other brother’s hat flew off. Fax: (801) 973-9546, Address: 3333 W 2400 S, Salt Lake City, UT 84119, Boise ACI is the official UK & Ireland distributor for the italBlowers range of side channel blowers and exhausters. For Enquiry Call +91-9821501735, Supplier, Mumbai, Thane, India, Ring blower, Side Channel Blower, Twin Lobe Rotary, Centrifugal Blower, regenerative blower, Heat Exchanger, Vacuum pump Diaphragm Rotary One type of positive displacement blower is the Rotary lobe blowers which consist of two rotors spinning in opposite directions. DHBT type side channel blower. This means that kinetic energy from a rotating impeller is transferred to the pumping medium and converted into pressure. Phone: (208) 522-0180 Side Channel Blowers are suitable for all those applications requiring considerably higher pressures than that which can be achieved using centrifugal fans. Available in both single stage and two stage units, ... CENTRIFUGAL FAN BLOWERS. Centrifugal Blowers. Ring blower have more advantage compared with roots blowers. When the gas exits the centrifugal blower, new gas enters to normalize the gas pressure. Fax: (208) 522-0181, Elko ... TB200-15 Centrifugal blower for gas delivery 11KW Inquire Now . They are incredibly loud but can be quieted with silencers. Industrial Blowers, Vacuum Pumps, Heat Exchanger From Turbo Blower Manufacturer. Single phase ring blower. As the name implies, this blower produces vacuum and air pressure; needed in petrochemical, effluent treatment & waste water treatment plants, and various other industries. Regenerative Blower, Centrifugal Blower, Side Channel Blower for Pressure. Mob : +91 - 9892593910 / 9821501735 / 9820449467, • Almost completely maintenance free Have a wide range of performance Robust yet light weight, • 50/60 Hz Voltage range motors Low level of noise, • No vibration, complete dynamic stability Pulsation free discharge, • Simple and minimal maintenance Higher Pressure Ratios, • Suitable to environment protection Small dimensions, • Drying out buildings - Ventilating/drying out buildings after flood, • Fishpond/breeding pond ventilation - Enriching water with oxygen, • Industrial vacuum cleaners, central extraction systems, • Lifting and holding parts using vacuum suction, • Laser printers - Powder dusting and extraction, • Paper Industry - Sheet separation, turning, transport, fixation and drying, • Soil Treatment - Extracting ground level air, • Swimming pool technology/spas - Blowing air into water tanks, • Textile machines - Extracting waste thread and fluff, • Ventilation of sewage treatment plants - Enriching water with oxygen. These are Specially Designed and Fabricated to ensure High Efficiency & … The RT Range of side channel blowers are suitable for a single or three phase supply. Compressors up to 4 bar are tailored by Dutair to your application. Ring Blower, Side Channel Blower, Centrifugal Blower, Renegerative blower, Twin lobe blower, Heat Exchanger, Tubine Blower, Turbo Blower Manufacturer Mumbai, India. We also provide advice, installation, servicing and design and development of pumping solutions based upon … Side Channel Blowers – Accessories. Mist Air Cooler. Classics with innovative technology - G-BH1 With their high inlet volume flow up to 2,500 m³/h and a differential pressure of up to 780 mbar, our low noise G-BH1 side channel blowers have earned their reputation. Now-a-days ring blower is used in lot of applications instead of roots blower use. If you need a blower with a significantly high pressure and flow, look for a high speed blower. To put it simply, positive displacement blowers trap and then release the air. DEREIKE Air Knife SA-25-S1 in ext... Air knife SA-25-S1. The beginnings of modern blowers go back to the mid-1800s, with engineering brothers Philander and Francis Roots. G-BH100 blowers are the smallest side channel blowers available on the market, with a height and width of approx. For help choosing the correct blower, talk to the experts at Compressor-Pump & Service, Inc. Save my name, email, and website in this browser for the next time I comment. The air or gas enters the fan wheel, turns 90 degrees, and speeds up before exiting the blower. You can use it for fish tank aeration, gas meter testing, and even powering artificial lungs. Phone: (208) 377-0225 The structure of a blower is usually composed of an impeller, an inlet door, a frame, a transmission housing, a coupling or pulley (triangle belt), and a motor. A centrifugal blower is an ideal tool to maintain a continual gas transfer. Teflon type turbo blower. Fax: (775) 738-1607, Address: 341 W Commercial St, Elko, NV 89801, Reno Now-a-days ring blower is used in lot of applications instead of roots blower use. Centrifugal side channel blower on sale manufacturers, find details about Centrifugal side channel blower manufacturers, supplier and wholesaler - REXCHIP Mechanical and Electrical Co.,Ltd. You can use these blowers to move both air and neutral gases. MS Series; MD Series; TS Series; TD Series; ATEX Series; Dosing Skids; Pneumatic Transporting. Use these guidelines to choose the perfect blower for your needs. Side Channel Vacuum Blower (For Suction) Side Channel Pressure Blower (For Blowing) Food washing equipment. CX Turbo Blowers. Sale price £240 00 £240.00 Regular price £288 00 £288.00. Air or gas enters through an expanding section on one side and exits through a decreasing section on the other side. RT Side channel blowers have the added benefits of a low noise operation(64-88db) and are a compact, virtually maintenance free design. DHB DAEHA ENG Ring blower regenerative blower side channel blower centrifugal blower turbo blower ... All about Ring Regenerative Centrifugal Side Channel Blowers BLOWING. Sale price £270 00 £270.00 Regular price £324 00 £324.00. One specific kind of centrifugal blower is called a multistage centrifugal blower. Axial Vs Centrifugal Blowers. China Side Channel Centrifugal Blower for Stocking Knitting Machine, Find details about China Centrifugal Blower, Side Channel Blower from Side Channel Centrifugal Blower for Stocking Knitting Machine - SCB Vacuum Tech Limited They are especially important in sensitive environments like food manufacturing facilities and hospitals. DHBT 210B D55 ring blower. All this leads to how these two designs affect leaf blower builds, and the design utilized seems somewhat contingent upon how the blower is powered. 3. The highly energy efficient technique of direct driven centrifugal blowers and compressors we call turbo blowers and turbo compressors. Centrifugal blowers are the most common blowers used in ventilation systems. The required power at the shaft and the discharge temperature increases simultaneously. BL01 SINGLE impeller / SINGLE stage Side Channel Blower - 0.2kW, 1" Connections. Unknown 전체 프로필 보기 . Our firm also works as a service provider to render After Sales Support solutions of offered products. This blower is also called as side channel blower or turbine blower and it is used in air agitation, aeration blower applications. Helical screw blowers typically produce air at higher pressures than rotary lobe blowers do. Salt Lake City Side Channel Vacuum Blower is a kind of vacuum blower manufactured, supplied by our company; to meet the demands of domestic and international markets. These blowers stand out for their durability, due to the robust aluminium design, which makes them highly resistant against corrosion. Side Channel Blowers are suitable for all those applications requiring considerably higher pressures than that which can be achieved using centrifugal fans. However, this air has low pressure (about 15 psi), so a rotary lobe blower is not the best choice for applications that require high pressure. Chlore Dioxide Systems; UV/Ozone Systems; E-BULLETIN. Our Infrastructure. Positive displacement blowers maintain a constant speed and flow regardless of changes in pressure. Side Channel (Regenerative) Blower, (as known as Vacuum pump, Air Pump, Ring Blower, Vortex blower)refers to a Blower with a range pressure of 30Kpa to 200KPa or a compression ratio of e = 1.3 to 3 under design conditions.as known as Vacuum pump, Air Pump, Ring Blower, Vortex blower)refers to a Blower with a range pressure They are an economical solution to a wide variety of applications. The use of Turbo side channel blowers is common in machine-building as high pressure ventilator, vacuum pump, air pump, booster, low pressure compressor and oil-free compressor. Ring Blower, Side Channel Blower, Centrifugal Blower, Renegerative blower, Twin lobe blower, Heat Exchanger, Tubine Blower, Turbo Blower Manufacturer Mumbai, India. Ring Blower, Aluminum Ring Blower, High Pressure Ring Blower manufacturer / supplier in China, offering High Efficiency Centrifugal Ring Blower Fan 2.2 Kw Side Channel Blower Fan, AC PP FRP Plastic Centrifugal Fan Blower, AC FRP PP Plastic Air Industrial Centrifugal Ventilation Exhaust Fan Blower and so … Additionally, we have a table with easy to read / understand specifications of our range of Olympias pumps here.. Side channel blowers can be used for vacuum or pressure and are efficient way to supply low pressure air or vacuum. As the impeller rotates, the gas between the impeller blades is radically and circumferentially accelerated and pushed into the side channel. Air knife TA-38-S1... Air knife TA-38-S1. Side Channel Compressors: 50/60Hz blower delivers pressure up to 650 hPa(g) & flow rates up to 2000m³/hr. Call : +91-9821501735 / 9892593910, +91-22-26852842. Product Description. Unlike positive displacement compressors and vacuum pumps, regenerative blowers ‘regenerate’ air through a process of centrifugal and rotational forces. Other advantages ofTurbo side channel ventilators include: For the three phase machines the tolerance is +/- 10% for fixed voltage range and +/- 5% for regular voltage range.The single phase machines are designed with a +/- 5% tolerance. The blades of the fan spin around a central shaft, creating a difference in air pressure th… side channel blower,High Pressure Single Stage Side Channel Blower manufacturer china But they do let some air escape, so they are not the most energy-efficient blower option. WRITE US. Ring blower VS Roots Blower comparison for your reference. Centrifugal blowers actually change the airflow’s direction as well. There are six main kinds of blowers, each with specific characteristics and uses. One of the best aspects of rotary lobe blowers is they produce a high volume of air, which is crucial for vacuum systems. The use of side channel blower needs our company’s special attention, because high-pressure fan is not only a high power consumption equipment or a high loss equipment, which requires us to pay more attention to the use and operation of the equipment, master the correct operation mode, and effectively improve the service life and work efficiency of centrifugal blower. Fax: (775) 284-1208. Working principle of side channel blowers (regenerative blowers) The blower is a kind of machine that uses the air pressure difference to draw in, compress, and finally spit out the air. Manufacturer of Centrifugal Blower, Air Blower & Side Channel Blower offered by Turbo Blower Manufacturer from Mumbai, Maharashtra, India Our History：Manvac was founded in 2012.Head office located in Hongkong.Factory and export sales office located in Dongguan city, China mainland. This blower is used for creating pressure, circulating air, and creating suction. Phone: (775) 284-1207 60 mm. In order to realise high operating reliability in your pump or blower, we will first show the safety mechanism for the side channel ventilator, implemented as a … They also perform more quietly than rotary lobe blowers. China Low Noise Industry Centrifugal Blower, Find details about China Blower, Side Channel Blower from Low Noise Industry Centrifugal Blower - Shenzhen Recker Technology Co., Ltd. Vacuum Pumps NZ have the best range of Side Channel Blower in New Zealand. Industrial Blowers, Vacuum Pumps, Heat Exchanger From Turbo Blower Manufacturer. It can handle high pressure and high flow rates and is ideal for creating high pressure from small volumes of air. Tips Side Channel Blowers. The gas moving through the machine therefore remains uncontaminated and completely oil-free. Filter Installation Elbows – Cast Iron; Filter Installation Elbows ... Silencers; Tee pipes for Relief Valves; Thread Flanges – 2 Bolt; Thread Flanges – 3 Bolt; Turbo Blowers; Vortron Centrifugal Blowers. These blowers are also referred to as lateral channel blowers, side channel blowers or ring compressors. Our comprehensive range of side channel blowers are fitted with … By using this method, the side channel blower is able to build a great differential pressure between in- and outlet. These machines are common used as aeration blowers and compressors for water treatment and industrial process air. Save £48 BL02 SINGLE impeller / SINGLE stage Side Channel Blower - 0.4kW, 1 ¼" Connections. Side Channel Blowers are used to produce high pressures or vacuums from relatively small motors and at very reasonable costs versus a high pressure centrifugal fan. These electrical blowers run via a motor. DHB 630B 2D2 air blower. Blower, Side Channel Blower, Centrifugal Blower manufacturer / supplier in China, offering Glass Tube Gas Outdoor Heater for Swimming Pool Gas Patio Heaters, Pyramid Stocked Feature and Patio Gas Heater in Stainless Steel, High Pressure Turbo Blower Flexible Water Spraying Nozzle and so on. However, a side channel blower generates lower air flow than, for example, centrifugal fans. Various components are used in safety features for systems with vacuum pumps and compressors. The operating principle of vacuum pumps has its own technology: the air gets sucked in through a fast rotary vane impeller. The differences between various blower types are small yet significant. These common examples of axial fans pull air through the fan, parallel to the shaft the blades rotate on. The applications are unlimited like aireting, dust cleaning, vacuum lifting, vacuum tables, blowing off, pneumatic transport, cooling and vacuum molding. DEREIKE Air Knife KA-25-S1 in ext... Air knife KA-25-S2. They can also be known as ring blowers or regenerative blowers. 2JM double stage Side Channel Blower. China Centrifugal Blowers, Find details about China Vertilation, Side Channel Blower from Centrifugal Blowers - Guangdong OuGuan Intelligent Blower Co., Ltd. Quick Contact. These types of blowers are good choices if you need to move large air volumes at a low pressure. A side channel blower transports air or gas by rotating a fan with many blades through a close narrow fitting pump house at high speed. Centrifugal Blower / Industrial Centrifugal Blower; Turbo Side Channel Blower; Medium Pressure Blower; Ring & Side Channel Blower ; Turbine Blower; Our firm also works as a service provider to render After Sales Support solutions of offered products. China Blower supplier, Side Channel Blower, Centrifugal Blower Manufacturers/ Suppliers - Manvac Technik Limited Save £54 Double Impeller / Double Stage Blowers. After this, the air in the side channel blower gets pushed and compressed outwards by the centrifugal force. Industrial Multistage Blowers and Side channel Blowers. 4JM High Pressure Blower. 702, Poonam Enclave A, Film City Road, Malad (E), Mumbai - 400097, Maharashtra, India. These intricate blowers are energy-efficient options as well. Another benefit to rotary lobe blowers is that they take little maintenance and work with most blower systems. China Centrifugal Blowers, Find details about China Vertilation, Side Channel Blower from Centrifugal Blowers - Guangdong OuGuan Intelligent Blower Co., Ltd. The flow of side channel blowers decreases when the pressure increases. DHBT 610B 2D2 regenerative blower . Vacuum cleaner. Industrial Blowers. Axial fans are actually named as such because of the direction of the airflow that the fan creates; fan blades rotate around an axis, forcing air out parallel to the axis. A centrifugal blower is an ideal tool to maintain a continual gas transfer. Regenerative blowers create pressure by displacing air molecules. High speed centrifugal blower. They’re also used to transport gas and control air pollution. We're Here to Help You! When an air stream passes through this blower’s rotating impellers, it increases in both speed and volume. Ring Blower, Aluminum Ring Blower, High Pressure Ring Blower manufacturer / supplier in China, offering High Efficiency Centrifugal Ring Blower Fan 2.2 Kw Side Channel Blower Fan, AC PP FRP Plastic Centrifugal Fan Blower, AC FRP PP Plastic Air Industrial Centrifugal Ventilation Exhaust Fan Blower and so … Turbo Die cast aluminium side channel blowers are robust units used for versatile applications. An iron foundry superintendent witnessed this and pointed out that he could use this machine to melt iron. Call +91-9821501735 Each helical screw blower has a main rotor with two lobes. DHB 420B 2D2 turbo blower. Inspired, the Roots brothers created their first blower. The sealed design of helical screw blowers leads to a smooth air flow and limited air leakage. Phone: (801) 973-0154 Side channel blowers are often used as vacuum pump. Our highly experienced team understands that as a business operating a controlled environment – such as a laboratory, processing facility or manufacturing facility – that you require a superior vacuum pump or blower, customised to suit your needs, that performs with consistent reliability cycle after cycle. 'PROMIVAC' Regenerative Vacuum Pressure Side Channel Blowers, Turbine Type, Single Stage are manufactured from good quality die casted aluminium alloy and are directly mounted on single / three phase Electric Motor. Fax: (208) 377-9477, Idaho Falls A side channel blower has a circular casing with a multi-bladed impeller, the combination which using the centrifugal thrust, ‘multiples’ up the pressure to a point where a relatively small machine can produce up to 0.5 Bar vacuum or .75 Bar … TB Turbo Blowers. 125 mm and a depth of approx. Side Channel Blowers. Centrifugal blowers actually change the airflow’s direction as well. Ring blower have more advantage compared with roots blowers. Sparse Phase; Dense Phase; Disinfection. China High Pressure Side Channel Centrifugal Blower, Find details about China Centrifugal Blower, Side Channel Blower from China High Pressure Side Channel Centrifugal Blower - Jiangxi SOP Precision Intelligent Manufacturing Technology Co., Ltd. The blower sucks in air, and the lobes spin the air around before pushing it out. Air blower Accessories. Helical screw blowers are used to move both air and gas, depending on the application. Side channel blowers work according to the impulse principle. CR Elec blowers are complete units ready for immediate installation either as a vacuum or as a compressor. Side Channel Vacuum Blower is a kind of vacuum blower manufactured, supplied by our company; to meet the demands of domestic and international markets. The side channel narrows at the rotor, sweeping the gas off the impeller blades and discharging it through the outlet silencer where it exits the pump. Today, blowers ventilate mines, charge internal combustion engines, and perform many other tasks. HTB Turbo Blower. Dereike side channel blower has passed CE, SGS,ROHS,UL,ISO2000 and other quality certification, using SKF bearings, with the characteristics of high temperature resistance, low noise and long life，etc. Hence, the maximum performance of the side channel blower is limited due to the motor power and the maximum acceptable discharge temperature. The two rotors turn in a helical pattern that is carefully timed so they do not contact each other. Side Channel Blowers – Accessories. If you have any inquiry or query, feel free to contact us. In order to realise high operating reliability in your pump or blower, we will first show the safety mechanism for the side channel ventilator, implemented as a … When gas passes through a centrifugal blower, it increases in kinetic energy. As the impeller continues to spin, it pushes the air forward, where it goes back to the bottom of the blade. Filter Installation Elbows – Cast Iron; Filter Installation Elbows – Plastic ; Hose Flanges; Hose Flanges – Stepped; Inlet Filters; Relief Valves; Silencers; Tee pipes for Relief Valves; Thread Flanges – 2 Bolt; Thread Flanges – 3 Bolt; Turbo Blowers; Vortron Centrifugal Blowers. Side channel blowers are used in all those applications requiring an operating vacuum higher than the one achievable by a fan, but not as high as to require the use of a vacuum pump. If only 90% of the maximum allowed pressure will be used for continuous operation then the allowed voltage range adds up to +/- 10%. When an air stream passes through this blower’s rotating impellers, it increases in both speed and volume. All of our products can be manufactured in accordance with the ATEX specifications ... from the supply of axial and centrifugal industrial fa n to the study and realisation of specific aeraulic efficiency system. And we can assist you with fast, expert, high quality help. EVEREST TURBO offers end to end solutions to Water & Wastewater Treatment Plants, Sewage Treatment Plants, Effluent Treatment Plants, Cement Plants, Aquaculture Farms, Chemical Plants, Paper Plants, Vacuum Plants and Systems, & Pneumatic Conveying Systems. High speed blowers can reach a pressure up to 25 psi and a flow up to 15,000 m3 per hour. Commonly used for aeration, air knives, vacuum lifting, cnc routers, waste water treatment, pneumatic conveying, printing, food packing, air sampling and many more uses. Every rotation adds kinetic energy, resulting in further increase of pressure along the side channel. When the gas exits the centrifugal blower, new gas enters to normalize the gas pressure. The pressure in the channel is intensified by a turbulent stream in the radial channel. 800-488-0154 When you're in the market for a blower, things can get complicated especially when it's your first time reviewing several competing blower technologies. Up to 1 bar is called a blower and for the higher pressures a compressor. Oil-free blowers are important if you don’t want oil released in the air. For Enquiry Call +91-9821501735, Supplier, Mumbai, Thane, India, Ring blower, Side Channel Blower, Twin Lobe Rotary, Centrifugal Blower, regenerative blower, Heat Exchanger, Vacuum pump Diaphragm Rotary Sirocco/EcoAir blower includes an impeller and a side channel formed with a semi-circular side wall and having an inlet and outlet. Turbine / Ring Blower; Side Channel / Regenerative Blowers; Twin … Blowers are ideal for aeration, combustion, transportation, and many other functions. Our blower with high efficiency, larger airflow, good quality is widely used in semiconductor electronics, food, and medicine, beverage, automotive industry, … Copyright 2014 Compressor Pump and Services, Inc. When gas passes through a centrifugal blower, it increases in kinetic energy. Side Channel Centrifugal Blower. Centrifugal blowers are the most common blowers used in ventilation systems. They have impellers at each side of the shaft to provide double suction. Home; About Us; Products . TB200-15 Centrifugal blower for gas delivery 11KW Inquire Now TB150-10 Centrifugal fan for industrial dust removal Inquire Now TB150-7.5 industrial furnace turbo blower Inquire Now DHB type side channel blower. Side Channel blowers are the first choice in many automation projects for applications requiring higher pressures or vacuums than can be economically produced by a centrifugal or high speed blower. We are a professional manufacturer of side channel blowers with over 15 years experience and production of over 100,000 units per year. A positive displacement blower has a function that’s straightforward yet effective. DHB 210A 0D4 Air Blower. The impeller spins to draw in and then capture the air between every blade. The frequency tolerance is maximum +/- 2%. Side channel blowers can operate as high pressure blowers but have smaller flow capacity compare to centrifugal fans. HTB125-704 High temperature resistance air centrifugal fan Dongguan Jieming Electric Tech Co., Ltd. E-mail: firstname.lastname@example.org Tel: +86 769 2166 1466 Fax: +86 769 2166 1466 Whatsapp : +86 137 9022 9580 Centrifugal force in the impeller blades accelerates the gas outward and the pressure increases. Air Knife.