Pre-Trimmed Dry Actuator, Series/Model: Series 753A

The Victaulic® series 753-A dry actuator/anti-flood device is a pneumatically actuated valve which must be used with pneumatically released Victaulic series 756 dry check valves or series 758 actuated valves to trigger system operation. System air pressure in the upper chamber sets the dry actuator in the closed position. This prevents water from escaping from the piston charge line and holds the main check valve's clapper shut. When a sprinkler head opens and system air pressure is released, the air evacuates from the upper chamber allowing the lower chamber to open. This permits water to escape from the piston and the main check valve to operate. This valve features an integral anti-flood device which prevents the main check valve from prematurely closing due to system water filling the valve's upper chamber. The series 753-A dry actuator/anti-flood device is rated to 300 PSI/2065 KPA working pressure and is tested and approved to be used with all sizes of Victaulic series 756 and 758 fire protection check valves. The lower chamber is constructed of durable 85-5-5-5 cast bronze, the upper chamber and internal components are made of 360 brass, the seals are EPDM, and the fasteners are 316 stainless steel.

• Specification Sheet https://macombstage.cimm2.com//ASSETS/DOCUMENTS/ITEMS/EN/Victaulic_S014753001_Specification_Sheet.pdf