Stopping Surge By Charmaine Jones Uniform bending is achieved by adjusting the spool valve's internal stroke limit.
Silicones are versatile assembly fluids that are used to seal, cushion, and attach.
Typical applications include weatherproofing housings, sealing bezels around touchscreens and monitors, and cushioning circuit boards and other electronic components. Controlled application of silicones is important for cosmetic appearance as well as product performance. But with hundreds or even thousands of psi needed to push these thick materials from bulk containers, through several feet of tubing, and out a narrow dispensing orifice, consistent results can be difficult to achieve. It occurs when pressurized material is suddenly expelled at the start of the dispensing cycle, resulting in uneven beads that are wider at the beginning than the end. The problem can be time-consuming to correct, since many dispensing devices require multiple adjustments to reduce surging to an acceptable level.