Founded in 1918, Parker Hannifin Corporation has grown to become a $13 billion, global company. Parker's engineering expertise spans the core motion and control technologies in Aerospace, Climate Control, Electromechanical, Filtration, Fluid & Gas Handling, Hydraulics, Pneumatics, Process Control and Sealing & Shielding. Parker Hannifin has become a global leader in HVAC and Refrigeration supplies, and sells some of the most popular and recognizable Filter Driers, Refrigeration Ball Valves, and Refrigeration Solenoid Valves available.