Electromagnetic valve (2; 102) for a fluid like pressurized gas, comprising: - a body (4; 104) with an inlet (8; 108), an outlet (10; 110), a main passage (6; 106) communicating said inlet (8; 108) with said outlet (10; 110), and a seat (12; 112) in said passage (6; 106); - an armature (14; 114) with a bore (14 5; 114 5) and a bore bottom (14 4; 114 4), said bore (14 5; 114 5) housing: ∘ a main valve member (16; 116) cooperating with the seat (12; 112) and comprising a pilot passage (24; 124) for the fluid; ∘ a pilot valve member (20; 120) configured for opening the pilot passage (24; 124) in the main valve member (16; 116); ∘ a core (18; 118) linked to the pilot valve member (20; 120) and a counter-core (22; 122) cooperating with the main valve member (16; 116), said core (18, 118) and counter-core (22; 122) forming a first air-gap; - a solenoid (28; 128) around the armature (14; 114) and configured for producing a magnetic field in the first air-gap (30; 130) that moves the core (18; 118) towards the counter-core (22; 122) and opens the pilot passage (24; 124); wherein the counter-core (22; 122) forms with the bottom (14 4; 114 4) of the armature (14; 114) a second air-gap (32; 132); characterized in that in the presence of the magnetic field and after movement of the core (18; 118) towards the counter-core (22; 122), said counter-core (22; 122) is magnetically attracted towards said bottom (14 4; 114 4) so as to move the main valve member (16; 116) and open the main passage (6; 106). - a body (4; 104) with an inlet (8; 108), an outlet (10; 110), a main passage (6; 106) communicating said inlet (8; 108) with said outlet (10; 110), and a seat (12; 112) in said passage (6; 106); - an armature (14; 114) with a bore (14 5; 114 5) and a bore bottom (14 4; 114 4), said bore (14 5; 114 5) housing: ∘ a main valve member (16; 116) cooperating with the seat (12; 112) and comprising a pilot passage (24; 124) for the fluid; ∘ a pilot valve member (20; 120) configured for opening the pilot passage (24; 124) in the main valve member (16; 116); ∘ a core (18; 118) linked to the pilot valve member (20; 120) and a counter-core (22; 122) cooperating with the main valve member (16; 116), said core (18, 118) and counter-core (22; 122) forming a first air-gap; ∘ a main valve member (16; 116) cooperating with the seat (12; 112) and comprising a pilot passage (24; 124) for the fluid; ∘ a pilot valve member (20; 120) configured for opening the pilot passage (24; 124) in the main valve member (16; 116); ∘ a core (18; 118) linked to the pilot valve member (20; 120) and a counter-core (22; 122) cooperating with the main valve member (16; 116), said core (18, 118) and counter-core (22; 122) forming a first air-gap; - a solenoid (28; 128) around the armature (14; 114) and configured for producing a magnetic field in the first air-gap (30; 130) that moves the core (18; 118) towards the counter-core (22; 122) and opens the pilot passage (24; 124); wherein the counter-core (22; 122) forms with the bottom (14 4; 114 4) of the armature (14; 114) a second air-gap (32; 132); characterized in that in the presence of the magnetic field and after movement of the core (18; 118) towards the counter-core (22; 122), said counter-core (22; 122) is magnetically attracted towards said bottom (14 4; 114 4) so as to move the main valve member (16; 116) and open the main passage (6; 106). wherein the counter-core (22; 122) forms with the bottom (14 4; 114 4) of the armature (14; 114) a second air-gap (32; 132); characterized in that in the presence of the magnetic field and after movement of the core (18; 118) towards the counter-core (22; 122), said counter-core (22; 122) is magnetically attracted towards said bottom (14 4; 114 4) so as to move the main valve member (16; 116) and open the main passage (6; 106).