Description Specifications Description ASCO Series 8551 valves are 3-way or 4-way, 5 ported 2 position piloted spool type single or dual solenoid valves designed for air or inert gas service. Valves are made of rugged anodized aluminum. A built-in manual operator allows manual operation when desired or during an electrical power outage. Each valve may be used for 3-way (normally closed) or 4-way operation by using the appropriate flow plate provided. Flow plates are marked (3/2) for 3 Ports, 2 Positions (3-way operation) or (5/2) for 5 Ports, 2 Positions (4-way operation). These valves are supplied with all necessary hardware for a NAMUR direct mount installation i.e. flow plates, gaskets, mounting screws, and a lcoating set screw.Special Features:Compact spool valve with threaded port connectionsAll exhaust ports are pipable, providing better protection against harsh environmentsStandard manual operatorDIN, Watertight and Explosionproof solenoids availableSingle and dual solenoid constructionsMountable in any position State of California Proposition 65 WARNINGCancer and Reproductive Harm - www.P65Warnings.ca.gov. Product Specifications Product SpecificationsAC/DC:DCInlet Pipe Size (NPT):1/4 inOrifice Size:1/4 inCoil Class:FTBody Material:Black Anodized AluminumCv/Kv (Pressure Port):0.86 Cv - 0.74 KvMax Ambient Temperature:77 F - 25 CMax Fluid Temperature:77 F - 25 CMin Ambient Temperature:5 F - -15 CMin Fluid Temperature:5 F - -15 CMin Operating Pressure (Air):30.0 PSI - 2.07 BarMax Operating Pressure (Air):150 PSI - 10.3 Bar Literature & Docs Accessories