The VMUS-4 (VMUS-K) Ozone Generator produces 10 g/hr ozone from oxygen, or 4 g/hr from dry air. Air cooled, wall mount ozone generator is very versatile and configurable for a wide variety of ozone production applications. Ozone concentrations over 6% by weight are possible at low oxygen flow rates.
The VMUS-4 is an extremely flexible ozone generator able to produce ozone efficiently from either dry air, or oxygen feed gas. Either vacuum operation or pressure is okay for the ozone generator cell. Air cooled operation allows for use in many applications without the hassle of cooling water. With the compact size and great ozone production, the VMUS-4 is a great value in ozone generators!
The VMUS-4 is a wall mountable Ozone generator which produces up to 10 g/hr of ozone @ 4 l/min of oxygen at over 3% by weight. Higher ozone concentrations are possible at lower oxygen flow rates. At 1 LPM the VMUS-4 produces ozone at 5.3% by weight. For full details on ozone generator performance view our performance chart
This generator utilizes corona discharge technology. The corona cell in the VMUS-4 uses a true quartz dielectric in a stainless steel shell. This provides maximum reliability and ability for future repairs if ever necessary. Every component on the VMUS-4 is replaceable or repairable for long-term operation in your facility
For lab or water treatment applications the VMUS-4 is a great option. Ozone concentrations over 5% are possible at oxygen flow rates less than 1 LPM. Ozone concentration is important to improve ozone solubility into water and increase potential dissolved ozone levels into water.
- Produces Up to 10 g/hr ozone efficiently
- Can also produce 4 g/hr ozone from dry air
- Wall mountable
- Flow meter is standard
- Adjustable output Standard
- Flow Switch Standard
- Detachable power cord
- Easy to install and operate
- Powder coated Al. cabinet
- Can operate under pressure or vacuum
- Circuit protection equipped
- Rebuildable ozone generator corona cell
- 120 or 220 VAC power, 50/60 Hz capability standard
Ozone Generator Options
Optional features shown in the ordering section are available for the VMUS-4 ozone generator, these are described further below:
4-20 mA input control - control output of ozone generator from 0-100% via a 4-20 mA input. Additional information on this in the adjustable ozone output section below.
External ON/OFF control - turn ozone generator ON/OFF via dry contacts from remote location. Useful for system integration where some automation is required.
Internal air pump - small air-pump can be built into the VMUS-4 to push air through the ozone generator. This is useful when the VMUS-4 is used with an air dryer to produce ozone and a motive flow source is required. Such as, a bubble diffuser at the bottom of a water tank.
Disable Flow Switch - option to disable the integrated flow switch. Useful for low-flow applications, where ozone production at flows below 1 LPM are required.
Integrated Flow switch
The VMUS-4 uses an integrated flow switch for simple and reliable automation. This switch will turn the ozone generator ON when feed-gas flow rises above about 1.5 LPM, and turn the ozone generator OFF when feed-gas flow drops below about 1 LPM. This provides some simple automation for your ozone system. When used with a simple venturi injector the VMUS-4 will turn ON and OFF automatically based on suction from the venturi. When used with an oxygen generator the VMUS-4 will turn ON and OFF automatically when flow starts or stops from the oxygen generator. This feature eliminates the need for external wiring or flow/pressure switches.
When the ozone generator is turned OFF due to no flow, the No Flow light illuminates indicating this. When the flow is present this No Flow light will go out, and the blue Ozone light will illuminate, indicating ozone is now produced.
This flow switch can be disabled by choosing the "Disable flow-switch" option when purchasing. There is no cost difference on this option.
Adjustable Ozone Output
The VMUS-4 uses a digital adjustable ozone output shown in the image above. This will allow setting the ozone output from 0-100% using the rocker switch. Green status lights will show the current power setting of the ozone generator clearly and easily. The ozone output can also be adjusted while the ozone generator is in a No Flow status and not producing ozone.
Ozone output can also be adjusted via 4-20 mA input. This allows adjustment of ozone output via a PLC or another device for automated operation. When this option is chosen the keypad is overridden as long as the 4-20 mA is connected, if the connection is terminated the keypad is functional again. Ozone output is displayed via the green LED indicators on the touchpad with the 4-20 mA input or the pushbuttons.
The VMUS-4 uses a sophisticated power inverter board that will protect the corona cell and/or transformer against failure. In the event, the corona cell does become contaminated with moisture, or dust the inverter will turn OFF ozone production immediately to protect against damage. Every 6 seconds this inverter will attempt to produce ozone and will restart automatically when conditions improve. While we hope our customers never flood, or contaminated the ozone generator corona cell, we know this is a possibility, this circuit protection will prevent potentially costly repairs.
Rebuild-able Corona Cell
The VMUS-4 corona cell is completely rebuildable. The Quarts dielectric can be removed from the stainless steel shell and be cleaned, or replaced if necessary. We know that air dryers, oxygen concentrators, and check valves can fail. Therefore we provide an easily rebuild-able corona cell so that these external failures do not have to be fatal to your ozone generator.
VMUS-4 Corona Cell
The most common failure of any ozone generator is poor feed-gas quality, either wet air, or poor quality oxygen. The VMUS-4 ozone generator corona will get dirty, wet, and full of contamination, however, the fundamental components of stainless steel and quartz are still good and can be disassembled, cleaned, and put back into service in even some of the worst cases.
Disassembly of corona cell
The VMUS-4 Corona cell consists of very few components. The Stainless shell and quartz dielectric are the main components. Each end is sealed with a Kynar end cap that has the fitting molded in (fewer leak points) with a Viton O-ring and Kynar sealing ring. We stock and sell all replacement and repair parts for the VMUS-4 ozone generator. Therefore, you can be confident that no matter what happens your ozone generator will be repairable.
Ozone Production from Oxygen:
||O2 Flow||O3 Concentration|
|2.0 g/hr||0.35 LPM||95 g/m3|
|2.69 g/hr||0.5 LPM||89.6 g/m3|
|3.87 g/hr||0.75 LPM||85.9 g/m3|
|4.78 g/hr||1.0 LPM||79.6 g/m3|
|6.29 g/hr||1.5 LPM||69.9 g/m3|
|7.67 g/hr||2.0 LPM||63.9 g/m3|
|8.73 g/hr||2.5 LPM||58.2 g/m3|
|9.4 g/hr||3.0 LPM||52.2 g/m3|
|10.92 g/hr||4.0 LPM||45.5 g/m3|
|11.97 g/hr||5.0 LPM||39.9 g/m3|
|12.67 g/hr||6.0 LPM||35.2 g/m3|
|15.54 g/hr||10 LPM||25.9 g/m3|
|16.92 g/hr||15 LPM||18.8 g/m3|
Click on the images below to see complete performance data for the VMUS-4 Ozone Generator
VMUS-4 Performance Chart showing maximum ozone production
VMUS-4 Performance Chart showing each ozone output set-point production
|Performance charts shown were created with an IN-USA ozone analyzer. Ozone generator was operated for at least 1 hour prior to the test to warm-up corona cell. Higher ozone concentration values would be possible with shorter run-times.|
Ozone Production from Dry Air:
||Air Flow||O3 Concentration|
|1.28 g/hr||2 LPM||0.8 %|
|2.19 g/hr||4 LPM||0.68 %|
|2.88 g/hr||6 LPM||0.6 %|
|3.3 g/hr||8 LPM||0.52 %|
|4.0 g/hr||10 LPM||0.5 %|
Click on image for larger view
Using the VMUS-4 with Oxygen:
We provide a variety of oxygen concentrators that could be used with the VMUS-4. Our recommendation would be the MAX-5. The MAX-5 will produce 4.9 LPM of oxygen, this is sufficient for a full 10 g/hr of ozone production from the VMUS-4. The oxygen pressures flow and general operation of the MAX-5 will be a great fit with the VMUS-4. However, if you choose to use your own oxygen concentrator, simply contact our office and let us ensure it is the right fit for your application.
Keep in mind that ozone generated from oxygen will be generated at a high concentration, and will, therefore, dissolve into the water more efficiently. Therefore, if using ozone to be dissolved into water consider using an oxygen concentrator first.
Click on image to enlarge
Using the VMUS-4 with Dry Air:
The VMUS-4 Ozone Generator can operate under vacuum. Using the VMUS-4 with the VMD-8 vacuum-driven air dryer is a simple method of dissolving ozone into water. A venturi injector can be used to create a suction of gas into a water stream. The ozone generator and air dryer can be plumbed in series so that the dry air is pulled through the ozone generator and into the water via the venturi injector. There will be no major moving parts and simple, reliable operation.
The wall dimensions and wall bracket connections on the VMUS-4 Ozone Generator. Please note this is listed in centimeter (cm).
- Ozone in water application for water treatment
- Ozone in swimming pools
- Laundry applications
- Well water treatment
- Bottled water
- Laboratory applications
Review from Oxidation Tech
The VMUS-4 is an extremely versatile ozone generator capable of operating from oxygen or dry air, and under a pressure or vacuum. This allows the VMUS-4 to fit a wide variety of applications. With the most recent updates to the VMUS-4 in 2017 the form, function, and reliability are second to none in this price and size range. The VMUS-4 is a reliable machine will all replaceable parts. We have successfully serviced units over 10 years old that are still in operation today, and with the newest updates, we feel the latest VMUS-4 is the best yet.
Due to the flexibility of the VMUS-4, it can be used in most any ozone generation application. This is one of the few ozone generators available that can efficiently produce ozone from dry air, or oxygen, at pressure, or vacuum. This flexibility along with the wall mounting configuration make this a great ozone generator for many applications.
How to Operate Flowmeter and Flow Switch Video:
|Call For Price||No|
|Ozone Output||10 g/hr ozone from oxygen, 4 g/hr ozone from dry air|
|Feed Gas||O2 or Dry Air|
|Nominal Gas Flow Rate||4 LPM oxygen to produce 10 g/hr ozone|
|Operating Pressure||5 PSI|
|Max Pressure||5 PSI|
|Cooling Method||Air Cooled|
|Corona Cell||Quartz , Stainless Steel|
|Gas Connections||1/4" barbed fittings|
|Dimensions||Enclosure Dimensions: 17-inch height x 10-inch width x 3.5-inch depth
Generator Weight: 15 lb
|Operational Temperature Range||35 - 95-deg F|
|Max O3 %||5% - 7.5%|
|Power Requirements||120 or 220 VAC, 50 or 60 Hz, 120 watts|
|Country of Origin||Canada|