Spray wands

Where possible, incorporate cleaning apparatus into the equipment. This can be accomplished either with spray nozzles, spray wands, or spray ball diffusers. Drains should be carefully placed in the equipment so that rinse waters and solvents are allowed to fully drain. 

The Ml7 Lightweight Decontamination System (LDS) is designed to draw water from any source and deliver it to the two installed spray wands at pressures up to 100 psi and at temperatures up to 120°C (Figure 16-40). The M17 LDS can be used to provide pressurized hot water before or after application of decontaminant at regulated pressures and temperatures. It has a liquid soap siphon hose attachment for use with mud, dirt, or grease removal (these may have absorbed chemical agent). 

The M12A1 Power-Driven Decontamination Apparatus (PDDA) is used to apply decontamination solutions or hot soapy water and rinses during field decontamination operations. The M12A1 PDDA consists of a pump unit, 500-gal tank, personnel shower assembly, and M2 water heater, all of which is mounted on a 5- or 10-ton truck with drop sides (Figure 16-41). The pump assembly can deliver 50 gal of water or super tropical bleach (STB) decontaminating agent per minute at a pressure of 105 psi to the two spray wands. 

Some equipment components used for vapor degreasing are similar to those used in ultrasonic cleaning. Ultrasonic cleaning equipment consists of an immersion tank, high frequency sound generator, and heater as shown in Fig. 11-5. Vapor degreasing and ultrasonic equipment are commercially available as separate units or combined in one unit, which may include a spray wand. 

The top spray system has been used to coat materials as small as 100 microns. Smaller substrates have been coated, but agglomeration is almost unavoidable due to nozzle limitations and the tackiness of most coating substances. Batch sizes range from a few hundred grams to approximately 1,500 kg. Typically, a single nozzle wand with up to six liquid delivery ports is used, but multiple nozzle systems have been applied. 

An alternative to using spray bulbs and wands to clean an isolator is utilizing disposable wipes soaked in an appropriate solvent to clean all areas that had potential to become contaminated with high-potency material. This allows the material to be solu-blized and removed from the surface. This wipedown can then be followed with... 

Fig. 3 Insulated nozzle and wand for top-spray hot-melt coating. (From Ref...

Before and after each application of a spray, a 20 ml aliquot was obtained from the sprayer through the wand for later analysis. 

Auxiliary equipment operation Work fiequently dbrush plating wand. No auxiliary equipment used for a lank plating... 

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