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Lockout Tagout Devices and Hasps Guide |

Lockout Tagout Devices and Hasps Guide


The following is a description of some of the most common devices implemented during the lockout process.

Valve Lockouts

Valve lockouts are designed to prevent the release of hazardous substances such as hot water or gas by preventing a valve from being opened.

Ball Valve Lockouts

ball valve lockout

Apply these lockouts to a ball valve handle when it is in the off position, and apply a padlock. The device presses up against the pipe or valve body and the handle cannot move ensuring the valve stays in the off position.

Gate Valve Lockouts

gate valve lockout

Completely cover a valve and rotate freely around it, preventing the valve from turning. There are various sizes available for use with common types of valves, and also adjustable versions which fit most gate valves.

Butterfly Valve Lockouts

butterfly valve lockout

Slides onto a butterfly valve when it is in the off position, clamping it so that it cannot be used.

Circuit Breaker Lockouts

circuit breaker lockout

Used to isolate a particular breaker so that an entire breaker box does not need to be locked out.

Cable Lockouts

cable lockout

Sometimes an energy source or valve will be in a place or of a design which prevents use of the usual types of lockout device, and in this situation a cable lockout can be used instead. Some cable lockout devices can also be used to lockout multiple energy sources.

Pneumatic Lockouts

pneumatic lockout

Equipment supplied by pneumatic energy also needs to be locked out. Pneumatic lockout devices prevent pneumatic fittings from being connected to a source of pressurized air thereby flowing through lines and moving some part of the equipment.

Plug Lockouts

plug lockout

Used to enclose electrical plugs or pneumatic equipment, preventing them being reconnected accidentally.

Lockout Boxes

lockout box

Used for group lockout situations, such as when a large team is working on one machine. Multiple keys are placed into the lock box. A lock is placed on the outside of the box until the job is complete


lockout hasp

A lockout hasp is used to isolate an energy source with multiple padlocks, allowing maintenance to be carried by out by more than one worker. It ensures the safety of staff by locking out an energy source until all workers have removed their padlocks.



Padlocks are used as part of the lockout tagout procedure to keep devices in place, and control access to the device by personnel. See our guide on choosing the correct padlocks for different lockout applications

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