March 2004 67C Series Instrument Supply Regulators Online supplier of Instrumentation, Fittings, Dust Collection, Belts, Lifting products, Various Valves, Motors and many other industrial products. The 67C Series regulators are typically used to provide constantly controlled, reduced pressures to pneumatic and electropneumatic controllers and other instruments. These direct-operated regulators are suitable for most air or gas applications. Other applications include providing reduced pressures to air chucks, air jets, and spray guns.