IN OUT i !3 !4 !5 u !1 y t r !0 w q e !2 o IN OUT Stainless steel Stainless steel 14 15 Series VXZ22/23 For Air, Water, Oil Construction Normally closed (N.C.) Normally open (N.O.) Body material: Brass (C37), Stainless steel Body material: Brass (C37), Stainless steel Working principles When the coil o is energized, the armature attacted by the core of the tube assembly i closes the pilot valve via the push rod assembly !1. When the pilot valve is closed, the pressure inside the pilot chamber increases, resulting in the pressure difference from the inlet pressure is lost and the main valve is closed. The coil o is de-energized, the armature returns by the reacting force of the return spring r via the push rod assembly !1 and the pilot valve is opened. When the pilot valve is opened, the pressure inside the chamber decreases, resulting in the pressure difference from the inlet pressure. Then the diaphragm assembly e is lifted and the main valve is opened. The push rod assembly !1 and the diaphragm assembly e are connected with each other with the lift spring !0. When the push rod assembly returns, the diaphragm assembly is pulled up and the main valve is opened. Component Parts No. Description Body Bonnet Diaphragm assembly Return spring O-ring Nut Armature assembly Tube assembly Note) Solenoid coil Lift spring Hexagon socket bolt Name plate Clip Body material brass (C37) specification Material Brass (C37) Brass (C37) Stainless steel (NBR, FKM, EPDM) Stainless steel (NBR, FKM, EPDM) Stainless steel . Stainless steel Stainless steel Aluminum SK Body material stainless steel specification Stainless steel Stainless steel 1 2 3 4 5 6 7 8 9 10 11 12 13 The materials in parentheses are the seal materials. Note) Cu and Ag are inapplicable to the DC spec and to the AC spec with built-in fullwave rectifier. Stainless steel, Cu Brass (C37) Brass (C37), Ni plated Stainless steel, Ag Component Parts No. Description Body Bonnet Diaphragm assembly Return spring O-ring Nut Armature assembly Tube assembly Note) Solenoid coil Lift spring Push rod assembly Valve assembly Name plate Cover Clip Body material brass (C37) specification Material Brass (C37) Brass (C37) Stainless steel (NBR, FKM, EPDM) Stainless steel Stainless steel . Stainless steel Aluminum Stainless steel Body material stainless steel specification Stainless steel Stainless steel 1 2 3 4 5 6 7 8 9 10 11 12 13 Stainless steel, Cu NBR Brass (C37) FKM, EPDM Brass (C37), Ni plated Stainless steel, Ag PPS, Stainless steel, NBR Stainless steel, FKM, EPDM o !2 !3 i y t r !1 w q e u !0 Working principles When the coil o is energized, the armature assembly u is attacted into the core of the tube assembly i and the pilot valve is opened. When the pilot valve is opened and the pressure inside the pilot chamber decreases, resulting in the pressure difference from the inlet pressure. Then the diaphragm assembly e is lifted and the main valve is opened. The armature assembly u and the diaphragm assembly e are connected with each other with the lift spring !0. When the armature assembly is attracted, the diaphragm assembly is pulled up and the main valve is opened. When the coil o is de-energized, the armature assembly u returns by the reacting force of the return spring r and the pilot valve is closed. When the pilot valve is closed, the pressure inside the pilot chamber increases, resulting that the pressure difference from the inlet pressure is lost and the main valve is closed. 88