The AVENTICS Series 511 (Size 1) ISO are high-speed, heavy-duty valves designed for general service on all types of pneumatic automation. The valves comply with ISO standard 5599/2 for valve unit-to-base interchangeability. Direct-solenoid and solenoid pilot-actuated models are available. They are multi-purpose valves that employ the patented AVENTICS spool-and-sleeve technology for reliability and extended service life in harsh environments.