An electronic accelerator includes a pressure sensor, a first control valve, and a control circuit. The pressure sensor detects a pressure in a fluid supply line between a fluid supply and at least one sprinkler head. The first control valve is coupled to a second control valve that when open permits fluid to flow from the fluid supply to the at least one sprinkler head. The control circuit receives the pressure detected by the pressure sensor, determines the at least one sprinkler head to be open based on the pressure detected by the pressure sensor, and in response causes the first control valve to open to reduce a chamber pressure in a chamber of the second control valve to cause the second control valve to open to permit fluid to flow from the fluid supply through the fluid supply line to the at least one sprinkler head.

An electronic accelerator includes a pressure sensor, a first control valve, and a control circuit. The pressure sensor detects a pressure in a fluid supply line between a fluid supply and at least one sprinkler head. The first control valve is coupled to a second control valve that when open permits fluid to flow from the fluid supply to the at least one sprinkler head. The control circuit receives the pressure detected by the pressure sensor, determines the at least one sprinkler head to be open based on the pressure detected by the pressure sensor, and in response causes the first control valve to open to reduce a chamber pressure in a chamber of the second control valve to cause the second control valve to open to permit fluid to flow from the fluid supply through the fluid supply line to the at least one sprinkler head.

An activator for a pilot type firefighting system for accelerating firefighting system activation is disclosed. The system comprises a control valve which acts to control firefighting fluid flow to a distribution system, and configured such that release of pressure to a control chamber would activate the control valve. The activator comprises a first chamber in fluid coupling to the pilot fluid and a second chamber in fluid coupling to the pilot line via a flow restrictor. A pressure sensing member is disposed such that pressure difference between the chambers would cause an activation of a switch. The release of the switch directly or indirectly causes activation of an electrical valve which vents the pressure in the control chamber. Several aspects of the invention include various firefighting arrangements, various optional features of the activator, firefighting system, and several methods of operation of a system utilizing the activator.

A sprinkler accelerator system includes an accelerator and at least one orifice. The accelerator is coupled with at least one pipe coupled with at least one sprinkler, and vents gas from the at least one pipe when the at least one sprinkler opens. The at least one orifice controls a rate of change of pressure in the at least one pipe to control operation of a flow control valve coupled with the accelerator.

A sprinkler accelerator system includes an accelerator and at least one orifice. The accelerator is coupled with at least one pipe coupled with at least one sprinkler, and vents gas from the at least one pipe when the at least one sprinkler opens. The at least one orifice controls a rate of change of pressure in the at least one pipe to control operation of a flow control valve coupled with the accelerator.