This video visually illustrates the stepbystep actuation of the Tyco Model DV5A preaction valve. The DV5A preaction valve is designed to provide maximum protection against inadvertent flooding from the sprinkler system piping.

Where water delivery time is critical, a QRS2 Quick Release Switch may be used to increase the systems response time and accuracy compared to conventional mechanical accelerators.

In addition, the DV5A system for Quell helps protect highrack refrigerated areas up to 55 feet. This system combines the QRS2 Quick Release Switch with linear heat detection and Ultra K34 or K17 sprinkler heads for maximum protection.

See below for related product information.