MOLEAER LOTUS
NANOBUBBLE GENERATOR
Owner’s Manual
www.moleaer.com 8
Connecting the Oxygen
The Moleaer Lotus nanobubble generator is designed for
use with compressed oxygen only.
Do NOT mix gases with this system.
All gas fittings and hoses must be maintained free
from oil and lubricants.
DO NOT PERMIT SMOKING OR OPEN FLAMES
IN ANY AREAS WHERE OXYGEN IS STORED OR
HANDLED. THE LOTUS GENERATOR MUST BE
SEPARATED FROM FLAMMABLES AND
COMBUSTIBLES BY AT LEAST 20’ (6 METERS)
OR HALF-HOUR FIREWALL.
Gas Flow and Pressure
Inspect the cylinder following the instructions of your gas
supplier. Be sure to inspect the regulator to see if the
sealing washer is in place on the inlet to the regular.
Connect the gas regulator to the feed gas tank to supply
the Lotus. Connect the hose between the supplied regulator
and the hose barb on the right side of the Lotus. Install hose
clamps. Open the valve on Gas tank slowly
(counterclockwise), about one full turn. If you hear a hissing
sound, there is a leak in the system. Turn the cylinder off
and turn the regulator on to relieve any built-up pressure.
Try tightening the regulator to the cylinder and opening the
cylinder again. If this does not help, shut the system down
again and contact a service representative. NEVER attempt
to repair a regulator or cylinder yourself.
Adjust flow on regulator dial by turning the knob clockwise
until the desired setting shows through the window. The
readings indicated are in liters per hour.
Spray soapy water to gas fittings and connectors to ensure
there are no gas leaks. If leaks are detected, then tighten
the hose clamps.
Gas flow rates can be adjusted depending on the
application and desired effect. The Lotus generators are
designed to deliver a spectrum of nano and/or micro
bubbles to meet the requirements of the process or
application. Low gas flow rates produce more nanobubbles
and have a higher gas transfer efficiency, whereas higher
gas flow rates produce both nano and microbubbles that
have a lower gas transfer efficiency, but higher mass
transfer rate. Refer to the specification Table 1 for
suggested gas flow rates.
If the cylinder pressure falls below 300 psi (20.5 bar), you
should exchange the cylinder for a full one. Turn off the
system, close the cylinder valve, wait for the oxygen to flow
out of the regulator, and turn the regulator to the “0”
position. NEVER try to remove the regulator unless the
cylinder is off, and pressure has been relieved.
System Operation
Pump must be fully primed before initial operation.
The pump is capable of self-
sufficient water in the pump strainer basket.
Operation at or near zero flow can cause extreme
heat, personal injury, or property damage.
1. Open the intake and discharge valves to flood
piping and prime the pump. Pump is primed by
removing the strainer lid, filling the basket with
water, and replacing the lid before starting. It
will take a few minutes for the pump to reach
full flow and the strainer basket is full, as can
be seen through the lid.
NOTE: If the Lotus generator is located above the
water line of the tank or water body, it is important to
install a check valve on the end of the intake.
Leaks in suction piping may only be visible while the
pump is off, and piping is flooded. Leaks in suction
piping may draw air into the system and impact
performance.
Press start switch to activate “ON” and run pump at normal
operating conditions and check the piping for visible leaks.
If necessary, adjust the pipe supports.
NOTE: Normal operating pressure range on the pump is
between 13 PSIG and 25 PSIG (0.9 BAR to 1.7 BAR). Pump
flow rates should be +/- 10% of the system’s designed flow.
Pump flow rates lower than the system specifications will
result in larger bubbles and lower oxygen transfer
efficiencies – it is NOT recommended.
Do NOT exceed 25 PSI (1.72 BAR) on pump
pressure.
Every Lotus unit comes with a rotameter (see general
arrangement). However, the flow should be controlled by
the regulator, with the rotameter knob in the fully open
position.
