Spray Injectors: Critical but Often Overlooked Components
At the heart of any spray application is the spray nozzle. But equally important in a spray system is the spray injector (also known as a spray lance or quill) that delivers the liquid and/or gas to the spray nozzle.

Like spray nozzles, spray injecto rs must also meet exacting standards to ensure optimal performance and to prevent costly inefficiencies. Relatively simple operations can often use a standard injector. Applications like gas conditioning, chemical injection, secondary fuel injection, emergency quench, and lime slurry injection often require a custom solution. Here’s why:

• Spray injectors used in these applications typically require sophisticated designs. Integrating the injector into the available space can be complicated and a standard solution, available in pre-determined designs, may be too simplistic
• Special materials and coatings are required to withstand high-temperature, erosive and/or corrosive environments
• Insulated, water- or steam-jacketed injectors often prove to be more effective in high-temperature applications
• Extreme engineering and safety issues require compliance with ASME® codes such as B31.1, B31.3 and others
• Retractable and flexible designs are frequently needed to minimize or eliminate process interruption and/or maintenance downtime. In most applications, standard hydraulic or gas atomizing nozzles are used in conjunction with a custom injector to achieve the desired spray performance

If you have a sophisticated application, give some thought to the equipment upstream of your spray nozzles. You may find that an integrated solution – spray nozzles and injectors – can help improve spray performance.