Air and Dirt Separators

Installing an Air and Dirt Separator guarantees the continual removal of air and dirt from the system, thus optimising equipment efficiency & minimizing downtime.

Economical, reliable and convenient

The installation of an Optivent ensures the continual removal of air from the system so that the equipment is performing at its optimum performance all the time.

  • Operating pressure 0-16bar
  • Fluid temperature 0-100°C
  • Sizes DN50 to DN600
  • Available as air only or as a combined unit
  • Large throat air vent fitted, also available as individual items.

 

WE CAN HELP YOU CHOOSE THE RIGHT Air and Dirt Separators FOR YOUR PROJECT

How air is generated
“In chemistry, Henry’s law is one of the gas laws, formulated by William Henry in 1803. It states that: At a constant temperature, the amount of a given gas dissolved in a given type and volume of liquid is directly proportional to the partial pressure of that gas in equilibrium with that liquid. Or solubility of a gas in a liquid at a particular temperature is proportional to the pressure of that gas above the liquid.” The 3 types of air that exist in a system are:

  • Free air – air that generally accumulates at the high points or dead ends of a system. It is air you can ‘see’.
  • Microbubbles – entrained air bubbles that over extended period of time and through extensive commissioning practices, eventually become free air. The greater the velocity of the system, the less chance of microbubbles transferring to free air.
  • Dissolved air – microbubbles not visible to the naked eye. Essentially a gas, that only morphs into microbubbles as the pressure is reduced in a system.

The air chamber of Optivents are designed to remove both free air and microbubbles. For the removal of dissolved gases, refer to the Masterflow Vacuum Degasser system.

Air removal is simple and takes place as the water enters a vertical chamber. This breaks the velocity in the water, and as the microbubbles collide with the internal stainless concentrator, they coalesce to form larger bubbles. The natural consequence is these inflated air bubbles rise to the top and discharge via the automatic air vent installed on the top of the Optivent.

Dirt Removal
Dirt is the enemy of all HVAC capital equipment, and must be removed. The design of the dirt chamber on an Optivent works in a similar fashion to the air chamber, in that the break in velocity as the water enters the vessel causes anything heavier than water to sink to the bottom. A simple test to verify if the Optivent will remove dirt particles is to put some into a jar and see if it sinks to the bottom. If it doesn’t sink, this is classified as suspended solids, and additional filtration is necessary for its removal – refer Masterflow Filtration…

Case Study

King Street Wharf Precinct

The King Street Wharf precinct, which is the area bound by Lime, Shelly & King Streets Sydney houses a range of commercial offices, Highrise hotel and several restaurants of various cultures. In preparation of the Bicentennial Celebration, the NSW embarked on a huge redevelopment of Darling Harbour which included the King Street Wharf (KSW). Work begun on this area in the mid1990s and was completed in 2000. Like many harbour front commercial properties, the sea water is used as the means of Heat Rejection. Pumps were installed in numerous basement plant rooms that serviced the mechanical requirements of the buildings within the precinct.

We recommend high-flow products for productivity which is longer than standart products.

Mentally, there is not a problem if you use standard product in high-flow installation but the separator can not work properly. For example; If you minimize the air to “0” after 200 circulation and filter all dirts with the high-flow product in 3m/s system,  standard product may do these after 700-800 circulation. Because of water speed, dirts and fresh water may enter and quickly exit from the air & dirt separator. So, dirts can not  fall to the bottom when water pass on dirt separator. *Given circulation numbers are just an example.

We recommend high-flow products for productivity which is longer than standart products.

Mentally, there is not a problem if you use standard product in high-flow installation but the separator can not work properly. For example; If you minimize the air to “0” after 200 circulation and filter all dirts with the high-flow product in 3m/s system,  standard product may do these after 700-800 circulation. Because of water speed, dirts and fresh water may enter and quickly exit from the air & dirt separator. So, dirts can not  fall to the bottom when water pass on dirt separator. *Given circulation numbers are just an example.

Air Only Separators (OVA Series)

  • Sealed
  • Demountable

Dirt Only Separators (OVD Series)

  • Sealed
  • Demountable

Our extensive range provides the ideal solution to eliminating contaminants such as air and dirt in heating and cooling systems. Our hydraulic separators can quickly and effectively remove free gas and dissolved gas in the systems as well as ease the dirt accumulation within the pipelines. Our products also greatly reduce erosion in the systems, enhance heat exchange efficiency and reduce system noise.

Frequently asked Questions

No. The need to be installed at the hottest point where there is a larger concentration of visual air bubbles, this is where the dissolved gasses form into micro bubbles. Chilled water circuit – the ideal location is on the return line Heating Water system – on the boiler supply line

The temperature goes up to and including 120 degrees centigrade and as low as minus 30 degrees centigrade for the standard units. We can on request go to 150, 200 etc. Keep in mind that the unit has to be installed on the hottest part of the system (return pipework) to remove the microbubbles and air efficiently.
Yes. The optivent does not eliminate the need for chemicals but does enhance your chemicals and make them more efficient.
The heat transfer rate in the heat exchanges will be increased because of the reduced air content in the water. Pump servicing will be less frequent, as the removal of air will mean seal failure and other associated problems with pumps will be greatly reduced

ENGINEERED SOLUTIONS FOR PUMPS, TANKS, CHILLERS, FILTRATION, VALVES & CONTROLS. Get a quote or contact us today

Masterflow is and has been a trusted name among Australia’s HVAC suppliers for over 20 years. We supply a wide range of pump types and can provide the ideal solution to the many and varied fluid requirements that face the industry. We pride ourselves on remaining agile, innovative, and having fast turn arounds. We are local! All our pumps are locally designed, built and manufactured here in Australia.

Our experienced team are here to help you. Please call us on 02 9748 2022 or leave us a message on our contact form.