Deadman Handle

A deadman handle is a safety device used in abrasive blasting systems to control the flow of abrasive material and compressed air. It is also known as a deadman switch or a deadman valve. The deadman handle typically consists of a lever or trigger that is connected to a valve on the blasting equipment. The operator must hold down the lever or trigger to allow the flow of abrasive material and compressed air to the blasting nozzle. If the operator releases the lever or trigger, the valve will close and stop the flow of abrasive material and compressed air, effectively shutting down the blasting process.

The purpose of the deadman control handle is to ensure that the blasting equipment is only active when the operator is actively engaged and in control of the process. This helps to prevent the accidental discharge of abrasive material, which can cause injury or damage to surrounding equipment or structures. It also allows the operator to quickly and easily shut down the blasting process in case of an emergency or if a problem arises.

In many jurisdictions, the use of a deadman handle is required by law for abrasive blasting operations. It is important for operators to be trained on the proper use and maintenance of the deadman handle, and to regularly check and test the device to ensure it is functioning properly.

Uses of Deadman Handle 

• Operator Safety: The primary use of the Deadman Handle is to ensure operator safety during abrasive blasting operations. It serves as a safety mechanism that requires continuous operator engagement to keep the blasting process active. When the operator releases the handle or lets go, the blasting operation is immediately halted, preventing any unintended discharge of abrasive media.
• Control of Blasting Operation: The Deadman Handle for blasting gives the operator full control over the blasting process. By holding onto the handle, the operator can initiate and maintain the flow of abrasive media from the blasting nozzle. Releasing the handle stops the flow of abrasive, allowing for precise control and preventing wastage or unwanted blasting.

Features of Deadman Handle

• Spring-Loaded Mechanism: The Deadman Handle for abrasive blasting typically features a spring-loaded mechanism. This means that the handle is in the "on" position by default when the operator is gripping it. When the operator releases the handle, the spring-loaded mechanism quickly returns it to the "off" position, stopping the flow of abrasive media.
• Ergonomic Design: Deadman Handles are designed with ergonomics in mind to ensure operator comfort and ease of use. They often feature a grip that fits comfortably in the hand, minimizing operator fatigue during prolonged blasting operations.
• Safety Interlock System: Some Deadman Handles may include a safety interlock system that requires a specific sequence of actions to activate the blasting process. This adds an additional layer of safety by ensuring that the handle cannot be accidentally engaged or manipulated.
• Durable Construction: Deadman Handles are typically constructed with robust materials that can withstand the harsh conditions of abrasive blasting. They are designed to be durable and long-lasting, able to withstand exposure to abrasive media, moisture, and other elements.
• Compatibility: Deadman Handles are designed to be compatible with various types of blasting equipment, including pressure blast cabinets, blast pots, and portable blasters. They often feature standard connections or adapters that allow easy integration with the blasting system.
• Safety Lanyard Attachment: Some Deadman Handles may have a provision for attaching a safety lanyard. This adds an extra layer of safety by allowing the operator to secure the handle to their wrist or clothing. If the operator were to accidentally drop the handle, the lanyard would prevent it from hitting the ground and potentially activating the blasting process.