Pilot Operated 2-Port Solenoid Valve/ Zero ... - SMC Pneumatics

Series VXS22/23For SteamConstructionNormally closed (N.C.)Body material: Brass (C37), Stainless steel!0!1iuyrwotqeWorking principlesWhen the coil i is energised, the armature assembly y is attracted to the core of the tube assembly u and the pilot valveis opened.When the pilot valve is open the pressure inside the pilot chamber decreases, resulting in the pressure difference from theinlet pressure. Then, the piston assembly e is lifted and the main valve is opened.The armature assembly y interacts with the piston assembly e at location . The piston assembly is pulled upward when thearmature assembly is attracted to open the main valve .When the coil i is de-energised, the armature assembly y returns by the reacting force of the return spring r and the pilotvalve is closed.When the pilot valve is closed, the pressure inside the pilot chamber increases, resulting that the pressure difference fromthe inlet pressure is lost and the main valve is closed.Component PartsMaterialNo. DescriptionBody material Body material stainlessBrass (C37) specifications steel specifications1 BodyBrass (C37) Stainless steel234567891011BonnetPiston assemblyReturn springO-ringArmature assemblyTube assemblySolenoid coilHexagon socket head boltName plateClipStainless steelPPS, Stainless steel (PTFE, FKM)Stainless steelFKMStainless steel, PPSStainless steel—Stainless steelALSKThe materials in parentheses are the seal materials.5