Description Specifications Description Slow Closing / Anti-Water Hammer - 3/8" to 2 1/2"The ASCO 8221 Series is a 2-way solenoid pilot operated valve available in Normally Closed and Normally Open constructions and in AC and DC brass bodies. The 8221 Series is designed to effectively reduce damage caused by water hammer. Special Features:Pilot operated, normally open or normally closedSnubber slows disc closing speed to protect system against water hammer damage more effectively than other techniquesPressure spike due to water hammer is reduced to a point eliminating the need for suppressors or other controls in most water systems State of California Proposition 65 WARNINGCancer and Reproductive Harm - www.P65Warnings.ca.gov. Product Specifications Product SpecificationsAC/DC:ACInlet Pipe Size (NPT):1/2 inOrifice Size:9/16 inBody Material:BrassCoil Class:FTCv/Kv (Pressure Port):3.50 Cv - 3.03 KvLead Length:18.00 in - 45.72 cmMax Ambient Temperature:125 F - 52 CMax Fluid Temperature:210 F - 99 CMin Ambient Temperature:32 F - 0 CMin Fluid Temperature:32 F - 0 CWatt Rating 60 Hz:6.10 WMax Operating Pressure (Water):150 PSI - 10.3 BarMin Operating Pressure (Water):5.0 PSI - 0.34 Bar Literature & Docs Accessories