y !0 r w !1 o u i t e q Construction Normally closed (N.C.) Body material: Brass (C37), Stainless steel Working principle When the coil o is energized, the armature assembly u is attracted into the core of the tube assembly i and the pilot valve A is opened. When the pilot valve is opened and the pressure inside the pilot chamber B decreases, resulting in the pressure difference from the inlet pressure. Then the diaphragm assembly e is lifted and the main valve C 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 C 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 A is closed. When the pilot valve is closed, the pressure inside the pilot chamber B increases, resulting that the pressure difference from the inlet pressure is lost and the main valve C is closed. Component Parts No. Description Body Bonnet Diaphragm assembly Return spring O-ring Nut Armature assembly Tube assembly Solenoid coil Lift spring Clip Brass (C37) body specification Material Brass (C37) Brass (C37) (NBR, FKM, EPDM) Stainless steel Stainless steel (NBR, FKM, EPDM) (NBR, FKM, EPDM) Stainless steel, PPS Stainless steel . Stainless steel SK Stainless steel body specification Stainless steel Stainless steel 1 2 3 4 5 6 7 8 9 10 11 The materials in parentheses are seal materials. Brass (C37) Brass (C37), Ni plated Series VXEZ22/23 For Air/Water/Oil 238