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AP Tech, also known as Advanced Pressure Technology, is a global leader in pressure regulators and valves used for semiconductor wafer fabrication and other clean industries such as solar and flat panel displays. AP Tech also services many other industries delivering specialty and bulk gases for a wide variety of applications.

The company was founded in 1987 and is based in Napa, California. APTech was acquired by SMC in May 2007 and continues to operate independently, though now a member of the SMC family.

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