High Pressure Oxygen Injectors

At Efficiencies Greater Than 96%


The OX Oxygen Injector Series
The OX series of Oxygen Injectors, combine rugged reliability and flexibility with efficiency of oxygen use.

Key Features
Efficient Use of Oxygen Typically the OX range shows an efficiency greater than 95% dissolution in to the water.
Low Oxygen Pressure Alarm A low oxygen pressure alarm is fitted, this can be connected via remote alarm contacts to existing farm alarm panels.
Modular Units Multiple units can be plumbed in parallel to give the required capacity.
Easy Installation The systems come ready skid mounted, all electrics are rated to IP65 and system is suitable for marine environments. Just connect it up and away you go!
Flexibility The systems can be turned up or down as your stock require it, making valuable savings in oxygen. OX injector controls can also be linked to oxygen controllers for optimum efficiency.
Self Regulating Control Prevents over use of oxygen. An integral auto-change facility is also available, which switches between oxygen bottles (or packs) when they are empty.
Integrated Alarms OX injectors come as standard with an alarm signal if the pump fails, or the pressure in the oxygen line fails.


Operation: Water is pumped through the contact chamber under pressure. At high pressures the water is able to naturally hold much more oxygen, also the oxygen bubble size is reduced which increases the gas / water interface. Any un-dissolved oxygen will rise up the column as bubbles and will be drawn back through the venturi into the water stream. Thereby increasing efficiencies higher than conventional cone systems.

Model No. OX-800 OX-1300 OX-2200 OX-3000
Oxygen injection (kg / hour @ 2.5 bar) 0.8 1.3 2.2 3.0
Approximate pump size 1.1 3.0 4.0 5.5
Standard supply voltages available 220V (1ph) / 415V (3ph) 415V (3ph) 415V (3ph) 415V (3ph)
Oxygen inlet size / type 1/2" barbed spigot 1/2" barbed spigot 3/4" barbed spigot 3/4" barbed spigot
Water inlet diameter 1 1/2" 2" 2" 2"
Water outlet diameter 1 1/2" 2" 2" 2"


Oxygen Control

Operation of the saturators are usually carried out by a feed back of information from oxygen probes and/or Flowguards. Although they can easily be manually operated, the use of an automatic system can optimise on oxygen consumption by keeping for example the tank outlets at 7 mg/l at all times.

Helpful Information

Fish Oxygen Consumption - in general is between 0.2kg and 0.3kg oxygen per kg fed. This can increase by more than 30% at peak times and decrease by more then 30% at the zenith

Natural Waters - especially lake supplies can vary in their oxygen content by more than 30% over an hour period.


The table below gives a GUIDELINE to oxygen level required:

Oxygen Concentration Effect on Salmonids (eg. Salmon, Trout..) Effect on Non-Salmonids (eg. Carps, Tilapias..)
0.3mg/l - 0.8mg/l Lethal Lethal to many species if sustained over a long period of time. Survivable by most for VERY short periods.
0.8mg/l - 4.0mg/l May Be Lethal Sub-lethal effects including poor food conversion, reduced tolerance to disease etc..
4.0mg/l - 5.0mg/l Sub-lethal effects including conversion, reduced tolerance to disease etc... Some sub-lethal signs, poor to average growth and food conversion.
5.0mg/l - 6.0mg/l Some sub-lethal signs, poor to average growth and food conversion. Normal growth and reproduction
6.0mg/l - 7.0mg/l Normal growth and reproduction Normal growth and reproduction
>7.0mg/l Recommended for good hatchery conditions Normal growth and reproduction