Badger Air-Brush Co. #51-041 PAC Valve Regulator. Miniaturized air pressure regulator, the PAC (Precision Air Control) valve, stock #51-041, includes # 51-038 Badger Male Quick Disconnect. The PAC valve provides a means to easily and precisely adjust the air pressure an airbrush is being sprayed at by the simple turning a small pressure setting dial. The PAC Valve attaches to any Badger/Thayer and Chandler airbrush hose (an adaptor is necessary for use with other brand hoses) and connects to the airbrush with a quick disconnect. Ideal for airbrush artists working on projects that require recurring air pressure adjustment, for more efficient atomization and detail control.