A micro-valve (164, 230, 2530, 2630, 2730, 3520, 3620) comprising: an orifice plate (250, 812, 1316, 1514, 1814, 2314, 2414, 2550, 3510, 3610) including a first surface and a second surface, the orifice plate comprising an orifice (260, 1318, 1516, 1816, 2316, 2416, 2560, 3560, 3660) extending from the first surface to the second surface; an actuating beam (240, 802, 1302, 1502, 1802, 2302, 2540, 2640, 2740, 3540, 3640) disposed in spaced relation to the orifice plate, the actuating beam including a base portion (306, 2542, 2642) and a cantilevered portion (308, 804, 1304, 1504, 1804, 2304, 2544, 2644, 2744), the base portion separated from the orifice plate by a predetermined distance, the cantilevered portion extending from the base portion towards the orifice such that an overlapping portion (806, 1306, 1506, 1806, 2306, 3549, 3649) thereof overlaps the orifice wherein the actuating beam is movable between a closed position and an open position; and a sealing structure (500, 800, 900, 1000, 1100, 1200, 1300, 1500, 1600, 1800, 2300) disposed on the actuating beam, the sealing structure comprising: a valve seat (810, 1512, 1812, 2200, 2312, 2412, 2570, 3522, 3672) surrounding the orifice, the valve seat defining an opening that surrounds the orifice to define a fluid outlet, a sealing member (178, 290, 808, 1102, 1202, 1308, 1508, 1614, 1508, 1808, 2100, 2308, 2590, 3524, 3624) disposed at the overlapping portion of the cantilevered portion, and characterised in that the micro-valve further comprises a first sealing blade (1510, 1602, 2310, 2592 extending a distance from a sealing member surface of the sealing member towards the orifice plate, the first sealing blade surrounding an entire perimeter of the orifice, the sealing blade configured to contact the valve seat in the closed position so as to seal the orifice and close the micro-valve. an orifice plate (250, 812, 1316, 1514, 1814, 2314, 2414, 2550, 3510, 3610) including a first surface and a second surface, the orifice plate comprising an orifice (260, 1318, 1516, 1816, 2316, 2416, 2560, 3560, 3660) extending from the first surface to the second surface; an actuating beam (240, 802, 1302, 1502, 1802, 2302, 2540, 2640, 2740, 3540, 3640) disposed in spaced relation to the orifice plate, the actuating beam including a base portion (306, 2542, 2642) and a cantilevered portion (308, 804, 1304, 1504, 1804, 2304, 2544, 2644, 2744), the base portion separated from the orifice plate by a predetermined distance, the cantilevered portion extending from the base portion towards the orifice such that an overlapping portion (806, 1306, 1506, 1806, 2306, 3549, 3649) thereof overlaps the orifice wherein the actuating beam is movable between a closed position and an open position; and a sealing structure (500, 800, 900, 1000, 1100, 1200, 1300, 1500, 1600, 1800, 2300) disposed on the actuating beam, the sealing structure comprising: a valve seat (810, 1512, 1812, 2200, 2312, 2412, 2570, 3522, 3672) surrounding the orifice, the valve seat defining an opening that surrounds the orifice to define a fluid outlet, a sealing member (178, 290, 808, 1102, 1202, 1308, 1508, 1614, 1508, 1808, 2100, 2308, 2590, 3524, 3624) disposed at the overlapping portion of the cantilevered portion, and characterised in that the micro-valve further comprises a first sealing blade (1510, 1602, 2310, 2592 extending a distance from a sealing member surface of the sealing member towards the orifice plate, the first sealing blade surrounding an entire perimeter of the orifice, the sealing blade configured to contact the valve seat in the closed position so as to seal the orifice and close the micro-valve. a valve seat (810, 1512, 1812, 2200, 2312, 2412, 2570, 3522, 3672) surrounding the orifice, the valve seat defining an opening that surrounds the orifice to define a fluid outlet, a sealing member (178, 290, 808, 1102, 1202, 1308, 1508, 1614, 1508, 1808, 2100, 2308, 2590, 3524, 3624) disposed at the overlapping portion of the cantilevered portion, and characterised in that the micro-valve further comprises a first sealing blade (1510, 1602, 2310, 2592 extending a distance from a sealing member surface of the sealing member towards the orifice plate, the first sealing blade surrounding an entire perimeter of the orifice, the sealing blade configured to contact the valve seat in the closed position so as to seal the orifice and close the micro-valve.