With the rapid advancement of technology, various dispensing techniques are developed. When faced with too many options, choosing the right type of dispensing valves can be challenging if you are unfamiliar with dispensing technology. Here is an overview of typical types of dispensing valves to help you choose the right one for your applications.
Diaphragm valve
Recommend applied materials:
The unique feature of the Diaphragm valve is the material used to make the liquid contacting part, which is ultra-high-molecular-weight polyethylene (UHMWPE). This enables the valve to prevent moisture from the air cylinder from contacting the fluid.
Therefore, the Diaphragm valve is ideal for use with moisture-sensitive fluid like cyanoacrylates, anaerobic threadlockers and other reactive fluids. Moreover, most low to medium viscosity fluid can be dispensed using one of the diaphragm valve variations.
General Features and benefits:
The Diaphragm material is durable, so it can handle millions of cycles before replacement is required. Other features that have made the Diaphragm valve a popular choice in the industry are its compact size, lightweight, simple cleaning and maintenance as well as adjustable stroke control.
Application:
This valve can be used for a variety of applications, including dispensing UV-cured adhesives in the medical device sector, and dispensing moisture-sensitive adhesives for general bonding applications.
Needle-off valve
Recommend applied materials:
Some recommended low to medium fluids are UV adhesives, solvents, inks, oils, primers, and activators. With this valve, higher viscosity fluid up to 100,000 cps can be accurately dispensed. It is also noted that moisture-sensitive fluid and fast-curing adhesives shouldn’t be used.
General Features and benefits:
Needle-off valve is not only unaffected by entrapped air in fluid, there is also a needle seat in the dispense tip. These features help this valve effectively perform a positive shutoff feature to eliminate dead fluid volume between shots, and makes it possible to produce even smaller and more consistent micro deposits.
Moreover, with the low-maintenance design, needle-off valves can be easily and quickly serviced, then operate again in seconds. Which means it can reduce the downtime and increase the profit margins.
Application:
For applications that require micro-dot-sized deposits, the micro-shot needle valve is an ideal choice.
For example, typical applications include dispensing small amounts of UV adhesive to bond the speaker of a hearing aid device and dispensing small dots of ink for marking applications, etc.
Spray valve
Recommend applied materials:
Spray valves are recommended to use with Low to medium viscosity fluids such as Activators, Coatings, Greases, Liquid Fluxes, Silicones, Solvents, Inks, Oils, etc.
General Features and benefits:
The compressed air dispensing valve ensures perfect ultra-fine spray discharge without over-spraying or scattering. Moreover, the spray valve whose nozzle end is not blocked, no clogging, dripping or drying out, can help to eliminate unwanted phenomena which increase the time of dispensing and reduce working efficiency.
Gluditec also provides the lineup of nozzles with various patterns that can provide the spray width and patterns desired by the customers.
Application:
Spray valves are frequently used for tasks like applying conformal coating to PCBAs, lubricating oil, and spraying ink to indicate Pass or Fail.
Auger valve
Recommend applied materials:
The Auger dispensing valve is designed to make precise, repeatable deposits of thermal interface materials, solder paste and other medium to high viscosity materials.
General Features and benefits:
It can perform high precise glue output with minimum dead volume in the valve. The Auger valve can also effectively reduce the problem of broken glue due to air bubbles. Moreover, its convenient disassembly and assembly of shaft and shaft sleeve, greatly reducing idle time due to cleaning materials.
Application:
The Auger valve can make precise, repeatable deposits of thermal interface materials, solder paste and other medium to high viscosity materials
Suck-back valve
Recommend applied materials:
High viscosity materials (Epoxy, Silicone, Urethane, Grease, Oil)
General Features and benefits:
After stopping putting pressure onto the surface of liquid, the materials would be able to continue pouring out or leaking due to the remaining air pressure. Our Suck-back valve would prevent these problems by ensuring that residual liquid is sucked back before it can escape.
As a result, Suck-back valve would help manufacturers achieve consistent deposits, a nice finished surface, and increase productivity. In addition, allows users to dispense virtually everything inside the syringe barrel reservoir — reducing fluid waste and operating costs.
Application:
Suck-back valve is designed to be able to dispense a large amount of material liquid. It is also the most suitable solution for the process requiring the vacuum efficiency to prevent the remaining pressure after dispensing.
High-pressure valve
Recommend applied materials:
High-pressure valves are designed to be used with High viscosity materials like Greases, Sealants, Silicones, Epoxy.
General Features and benefits:
High-pressure valve ensures high dispensing accuracy, capable of easily adjusting the dispensing volume minutely.
Gluditec also supplies pressure pump systems to be used with high-pressure valves in order to provide users with the most precise dispensing dots or lines. Moreover, high-pressure valve’s type has a product line of needle-off valves or suck-back valves’ features to prevent the dispensing system from dripping materials.
Application:
Dispensing sealant for form-in-place gaskets, dispensing grease for automotive applications, and filling material into syringes or cartridges for the material packaging industry are the three most typical uses of high pressure valves.
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Different types of dispensing valves also have additional features and other parameters to serve a variety of demands. Moreover, we also provide additional equipment to boost valve performance, thereby increasing the revenue of the manufacturer. You can visit our website or contact us for consulting to find the valve that best suits your needs:
Email: info@gluditec.com
Hotline: (+84) 969 469 089