Dosing a liquefied gas chemical
Dosing a liquefied gas chemical
(OP)
I am attempting to develop a new process for quickly and automatically injecting a specific amount of a pesticide into soil within an orchard replant setting.
Once it can be determined how best to configure for quickly releasing a specific dose of the chemical from its pressurized cylinder, I believe that all else will fall into place.
The chemical, Methyl Bromide (MB), flows much like a refrigerant. MB is a liquid when contained and pressurized (typically at 50-200 psi), but quickly converts to a gas when released into the atmosphere.
The amount to be injected would vary from 4-24 fl/ozs. The speed of release varies, depending upon the pressure and temperature of the contained chemical. With the current manual system of injection, the chemical travels at about 1 fl/oz per second from a .5 inch ID cylinder orifice, through a .1 inch ID line.
My understanding of flow meters and pumps is primitive. I am currently looking into positive-displacement pump information. In any case, I can not seem to find a good fit out there for this application.
Any help will be greatly appreciated.
Bill
Once it can be determined how best to configure for quickly releasing a specific dose of the chemical from its pressurized cylinder, I believe that all else will fall into place.
The chemical, Methyl Bromide (MB), flows much like a refrigerant. MB is a liquid when contained and pressurized (typically at 50-200 psi), but quickly converts to a gas when released into the atmosphere.
The amount to be injected would vary from 4-24 fl/ozs. The speed of release varies, depending upon the pressure and temperature of the contained chemical. With the current manual system of injection, the chemical travels at about 1 fl/oz per second from a .5 inch ID cylinder orifice, through a .1 inch ID line.
My understanding of flow meters and pumps is primitive. I am currently looking into positive-displacement pump information. In any case, I can not seem to find a good fit out there for this application.
Any help will be greatly appreciated.
Bill





RE: Dosing a liquefied gas chemical
good luck!
-pmover
RE: Dosing a liquefied gas chemical
RE: Dosing a liquefied gas chemical
It seems that a new invented is warranted? Do you require intermittent injection or adjustable frequency (speed) of injection, hence a rotary injection pump?
I suggest you talk to a company called Lewa who can help you with a package that will include a pump and peripherals that will control the varying capacities that you require. They are well known and leaders in their field. Hope this helps.
Regards,
Bill.
RE: Dosing a liquefied gas chemical
Best,
Bill
RE: Dosing a liquefied gas chemical
Thanks, I would appreciate hearing the outcome. I don't think that your liquefied gas will be a problem for them as a common application is dispensing matural gas odourant (which is extremely volatile at ambient conditions).
Regards,
Bill