Basically, dispensing valves are mechanisms tasked to control or regulate the flow of a liquid material from a pressurized receptacle, such as a syringe or other similar containers, to the dispensing tip by opening and closing a passage way. They are attached to the dispensing containers.
Dispensing valves can be operated through several methods. Most of the time, designs use air pressure, springs or electric solenoids to activate the valves. For example, air pressure may be used to open the valve and a spring may be used to close it.
Dispensing valves are important for accurate and precise dispensing of liquid materials which are extremely hard to manage.
Needless to say, dispensing valves are crucial in most liquid dispenser systems. Without it, processes cannot effectively control and utilize liquid substances.
Say for example you are working in the information technology industry. IT manufacturing companies use liquid adhesives to assemble small mechanisms for the various devices. If your liquid dispensers lack the right dispensing valve, the process might not work properly or might not be as efficient. In the automotive industry, liquid dispensers are needed in applying grease to small gears. If not for an appropriate dispense valve, this task will be extremely hard.
There are different kinds of dispensing valves available depending on your needs. Some of the commonly used types are the diaphragm valve, the needle valve and the pinch tube valve.
The Diaphragm valve is a valve utilizing a moving plunger or poppet which controls the passage of liquid materials. It produces the “suck back” actions which add to the precision and accuracy of material flow.
The Needle valve, on the other hand, contains a tapered needle and a cone shaped seat. The needle action is integral to the whole dispensing process. Needle valves are used for low viscosity liquid materials such as accelerators, marking inks, silicone oils, solvents, and UV-cure adhesives. Despite the seemingly delicate details of the needle valves, they have low maintenance designs.
The Pinch Tube valve uses a flexible tube connected to the pressurized reservoir. As usual, there is a plunger to regulate, stop, or allow the flow of liquid substances. You can automate and adjust the rate of flow depending on your preferences.
The Syringe valve constitute a syringe which houses the fluid. It is directly connected to the valve’s dispensing tip. What is special about this type of valve is that it is time-controlled. It is activated through pressurizing the fluid. The flow of the fluid material depends on the automated amount and duration of the applied pressure.
There is no doubt that the technology of today is advancing rapidly. Companies and tech giants around the world are working very hard to develop technologies that can help make our lives easier. Thanks to technologies such as the dispensing valves our processes are easier than before.