What are the two types of quick opening devices in a dry type system?

In a dry type fire suppression system, the two types of quick opening devices are indeed referred to as the exhauster and the accelerator.

The exhauster is designed to remove air from the system when a triggering event occurs, which helps to quickly open the valve that releases the suppressing agent. This is vital in ensuring that the system can respond rapidly to a fire, minimizing damage and enhancing safety.

The accelerator functions to speed up the operation of the system by increasing the flow rate of the suppression agent, ensuring that it reaches the fire as quickly as possible. This type of device is crucial for the rapid activation of the fire suppression system, allowing it to work efficiently in controlling or extinguishing a fire before it spreads.

These roles are essential to a dry type system's effectiveness, making it clear why the exhauster and accelerator are integral components for a quick response to fire emergencies.