Valves are the cap or lid that is pressed and crimped onto the can creating the seal that keeps the medication and propellant inside of the inhaler.
The valve is the heart of the inhaler system. It is by far the most critical part of the system, the actuator is the next critical part of the system, please see the other part of this page labeled ” Actuator ” for more information. The valve is highly accurate, dose to dose, from the first to the last actuation.
There are approximately 7 to 10 manufacturers thought the world, each one of these manufactures produces 25 to 30 different valves consisting of different materials, designs and µL ( Micro Liter ) volume capacities. Each producer uses about 3 to 4 different physical shape and design of the valves depending on the application. See pictures below.
This leaves the manufacturer with many choices to choose from. Unfortunately to purchase the equipment to crimp and gas the inhaler can, you must provide 20 can and valves, as samples to the equipment builder when you purchase the equipment. They use these samples to build the crimping and gassing head of the machine. If you choose the wrong valve because you have guessed, and have to change to a different valve, you will have to change the crimping and gassing heads on your machine, This is expensive and will take 2 to 3 months to get new parts made.
EM3 has tested about 20+ different valves over the past 5 years. We have learned only 3 of these 20+ valves will infact work correctly with the cannabis THC / CBD formulation.
The drawing above is the schematic drawing of how the valve works, #1 is the medication in the can with liquid propellant. #2 is the metering chamber, this is the part that sets the micro liter volume amount of delivered product. #3 is the stem, this is the part that inserts into the valve when you actuate the actuator. #4 is the seal that keeps everything from leaking. #5 is the opening the stem rests in inside of the actuator. #6 is the nozzle of the actuator.
If you look closely at the photos, you can see the difference between the valves around the top area where the nylon stem exits the valve. Their are some other differences that are not so apparent. Stem length, size and diameter are some variables you have to know before ordering equipment. Other factors include the way the can is gasses, some valves fill thru the stem, others fill thru a small hole on the side of the stem. This is all information you will need to know before ordering equipment.