The value of air and gas compressors combined with vacuum pumps could rise from $3.7 billion in 2006 to $4.4 billion in 2010, according to market research publisher SBI, a division of MarketResearch.com. Similarly, the value of the industrial spraying-equipment market is projected to increase at a compound annual growth rate of nearly 12%, from $1.5 billion in 2006 to $2.3 billion in 2010.