Valves
What is Valves?
A valve is a device or natural object that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways.
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At their most basic, valves are devices that work to control, regulate or direct flow within a system or process.
They often feature a range of characteristics that help to define their ideal application.
However, whether you're looking to control flow, provide safety in a system that is piping liquids, solids, gasses or anything in between, there are likely stainless steel valves available to help.
Valves provide several functions, including:
Starting or stopping flow based on the valve state
Regulating flow and pressure within a piping system
Controlling the direction of flow within a piping system
Throttling flow rates within a piping system
Improving safety through relieving pressure or vacuum in a piping system
Valve Opening Methods Explained
While many valves accomplish similar goals, how they do so mechanically can vary.
How a valve opens and closes will not only impact the overall performance but also determine how much control you have over the flow and how quickly the valve can operate.
What Are the Application Areas of Jetting Valve?
Jetting valves are versatile instruments that can be used in a variety of applications across industries. They are designed to dispense liquids, adhesives, and other materials accurately and with high repeatability. They have become an essential and widely used tool for manufacturers in various sectors, including electronics, automotive, healthcare, and aerospace.
Electronics
In the electronics industry, jetting valves are used to apply adhesives, coatings, and bonding agents in the manufacturing of printed circuit boards, semiconductor wafers, and other electronic components. They are also used in the assembly process of various electronic devices and can be used for soldering, encapsulating, and coating parts.
Automotive
Jetting valves are frequently used in the automotive industry for bonding components together and sealing materials. They are used to apply gaskets, adhesives, and sealants for parts such as car windows, sunroofs, and headlights. Jetting valves can also be used for applying coatings to car interiors and exteriors as well as for applying lubricants and greases to engine components.
Healthcare
Jetting valves are essential in the pharmaceutical and medical device manufacturing industries. They are used to dispense precise amounts of liquid and paste formulations for drug delivery, medical adhesive application, and implantation procedures. Jetting valves can also be used for depositing bio-materials for tissue engineering and regenerative medicine applications.
Aerospace
Jetting valves play a crucial role in the aerospace industry for bonding and sealing parts that are exposed to harsh and extreme conditions. They are used in the production of aircraft parts, such as wings and fuselage components, and for assembly and maintenance operations.
Piezo Jet Valves - Art Dispensing
Jet Valves vs Contact-Based Valve
One of the big speed advantages of jet valves over contact-based valves is in their movement. Contact-based valve systems must move the dispensing needles down to contact the substrate, then pull back up, reposition, and start again. This repeated up and down motion on the Z-axis takes valuable time. Because the dispensing needle must touch the substrate, additional time is spent with careful height-sensing and repositioning, which also adds to the total dispensing time.
Contactless jet valves eliminate this excess motion by accurately shooting the fluid being dispensed from a fixed location above the substrate. There is no up-and-down motion on the Z-axis. This economy of motion enables a jet valve to dispense 10 – 20 times faster than a contact dispense process.
Piezo Jet Valves vs Pneumatic Jet Valves
When considering a jet valve, be careful to always distinguish between "pneumatic jet valves" and "piezo jet valves." More common pneumatic jet valves rely on air pressure and mechanics to dispense. Piezo valves, by contrast, use an actuator to create an incredibly precise motion within the valve, dispensing material at much higher speeds.
The process of the pneumatic valve opening, closing, and resetting only takes an extra 20 milliseconds, but those milliseconds add up quickly. This difference makes the piezo jet valve up to twice as fast as a pneumatic jet. For operations looking to maximize throughput, this is an outstanding increase in productivity.
Other Advantages of Piezo Jet Valves
Another huge advantage of the piezo jet valve is its ability to accurately deliver material in the production of substrates with irregular heights, or where there are hard-to-reach areas. With the fluid being jetted rather than dropped into place, the nozzles can be angled to reach the exact point where the material is needed.
And since the dispensing nozzle does not make contact during the application, there is less likelihood of damaging the product compared to a contact-based valve. The piezo jet valve moves quickly over the substrate, with little to no damage, waste, or downtime.
Fine-Tuning the Settings
The key to taking full advantage of a piezo jet valve is in determining the ideal "recipe." This is the exact combination of parameters to ensure the precise placement and amount of material dispensed.
Piezo jet valves achieve their small dot sizes using tiny nozzle apertures and finely tuned material pressure and jetting pressure settings. Once all these parameters are determined, the valve is extremely accurate and consistent. But getting to that point may take some trial-and-error.
When shopping for a piezo jet valve, be sure to determine the level of support you will receive from the manufacturer. Each dispensing application is unique, so find a manufacturer that offers some level of hands-on testing of your materials in their valve. This is the best way to ensure their valve will meet your challenges. And confirm they can help quickly fine-tune your controller parameters for your operation.
The Controller
Controllers for the piezo jet valve have reached the cutting edge as well, offering incredibly precise parameter control. Smart Controller with advanced touchscreen controls and intuitive user interfaces, that allow for faster set-up and ease of operation.
The most advanced controllers allow the operator to monitor the system through their smartphone, adjusting settings and troubleshooting from anywhere in the world. These fully connected jet valve systems fit perfectly into the operation of an Industry 4.0 factory, or a facility that is moving in that direction.
Purchasing Considerations
Consider the size, weight, and footprint of the valve itself, and how it will fit into the available factory space. Machine integrators take advantage of the piezo valve's speed and precision by building them into high-end automation equipment, delivering best-in-class results.
Be aware that piezo valves are highly precise pieces of equipment that are very difficult to properly manufacture. The tolerances of the components are extremely tight and producing them within these parameters may be impossible for many parts fabricators. Lower-priced piezo valves quickly develop problems, causing inaccurate dispensing, inconsistent speeds, and other failures that negatively impact productivity and quality. Be sure you are purchasing from a top dispensing valve manufacturer.
Such cutting-edge technology comes at a price, and a piezo valve system is a larger investment than that of a contact-based dispensing system. Still, the lifecycle cost is surprisingly similar to older pneumatic systems, with the piezo assembly rated at around 1 billion cycles. If your manufacturing process would benefit from dispensing at the highest speed and with super-high precision, the investment is worth it.
How Choose to Dispensing Valve Systems Selection?
Dispensing valve systems are designed to provide precise fluid dispensing depending on applications. There are different types of precision dispensing valve including diaphragm valves, micro-dispensing valves, needle or spool dispensing valves, pinch valves, spray valves, or positive displacement precision valves.
Diaphragm and micro-dispensing valves are two types of dispensing valve systems. Diaphragm dispensing valve systems receive pressure, forcing it to allow materials through the fluid body and out the dispensing tip. Micro-dispensing valves have a micro-liner and nano-liter dispensing capabilities. They often have interfaces for circuit board integration.
Needle or spool, and pinch precision dispensing valves are also available. Needle or spool dispensing valves release fluid when an activator acts on a piston, which shifts the needle or spool into an open position. Pinch valves are precise valves that use occlusion to direct the movement of the media.
Other types of precision dispensing valve systems include spray valves and positive displacement valves. Spray precision dispensing valves spray media, especially viscous fluids, onto a target area. Positive displacements valves provide fluid dispensation depending on the application. They function by opening quickly, releasing the product, and closing again.
The dispensed output can be a bead, dot, flat spray, round spray, or fill (potting). The type of dispensing pattern from precision dispensing valves is determined by valve design and is dependent on dispensed fluid properties.
Each output or pattern from Dispensing valve systems has specifications that are applicable to the shape. Dot outputs have a specifiable diameter and operating frequency. The dot size diameter is specified in mils and the operating frequency in dots per minute. Round spray outputs have a specifiable diameter and spray frequency. The spray diameter of precision dispensing valves is specified in mils and the frequency in cycles per minute. Flat spray or bead outputs have a width range and bead or spray frequency.
Dispending valve systems or bead width is specified in mils and the frequency in cycles per minute. Fill outputs have a minimum shot size, a maximum flow rate, a maximum fill operating frequency and repeatability. The minimum shot size is specified in cubic centimeters, the maximum flow rate in milliliters per minute, and the maximum fill operating frequency in cycles per minute. Repeatability is specified as a percentage.
Our Factory
Guangdong Anda Automation Solutions Co.,Ltd. is a smart equipment and system manufacturer providing vertical integration of research & development, manufacturing, sales and service to fluid applications, and intelligent automation systems. Anda's main product lines include high precision dispensing machines, conformal coating systems, plasma treatment equipment, curing systems, multi-functional assembly systems, semiconductor manufacturing equipment, medical electronic dispensing and assembly machines, and smart manufacturing system solutions. Anda equipment covers the application of consumer electronics, automotive electronics, communication electronics, instrument equipment, electric appliances, new energy, power supply, LED, military electronics, medical electronics, semiconductor and other industries.
FAQ
We're well-known as one of the leading valves manufacturers and suppliers in China. If you're going to buy valves made in China, welcome to get quotation from our factory. Also, customized service is available.