Choose from a wide range of airline lockout and pneumatic lockout valves from Aro, Milton Industries and Speedaire. They are designed to prevent unauthorised pressurisation of air systems by shutting off airflow during service or maintenance. Aro OSHA-compliant pneumatic airline lockout valves are designed to prevent the accidental start-up of pneumatic tools due to accidental supply of compressed air. They feature a lockable tab slider to block the inlet port and exhaust the downstream air into the atmosphere. The slider has a hole to disable unintentional shifting. These modular valves support airflow up to 471 CFM. Speedaire valve lockouts are manually operated airline lockouts designed to handle air pressure up to 300 PSI. These Speedaire lockout valves are made from zinc for durability and feature elastomer seals for tight shut-off. They are available in 3/8, 1/2 and 3/4 inch NPT port sizes.