AVENTICS directional and pressure control valves, actuators and cylinders provide the reliability, quality, ruggedness and precision needed to ensure safe, positive pneumatic control for clutches, brakes, transmissions and diesel engine governors for drawworks on drilling and service rigs and associated equipment. The leader in the industry from the beginning, our products are found world wide - wherever oil and gas is produced. Valves such as our H-Controlair®, A-Pilotair®, P Rotair®, and D-Pilotair® withstand the harsh conditions and are considered the industry standard.