passageway is prevented by the closure member the closure member includes a stem portion and a gate portion wherein the gate portion includes a port extending therethrough and wherein the stem portion and the gate portion are formed as a single integral piece application_number US 201615243185 A description fig1 12 illustrate a control gate valve constructed in accordance with the present invention the valve 100 comprises a body 101 having a cylindrical neck opening 102 with two cylindrical axial slots 106 106 u2032 in an opposite direction and extended to an inlet passageway 104 and an outlet passageway 105 a closure member 120 having a stem 124 and a gate 121 having a port 125 and two axial cylindrical slots 126 126 u2032 in an opposite direction is movably disposed in opening 102 by means of two cylindrical mating surfaces 122 122 u2032 and two hollow cylindrical support bars 145 145 u2032 engaged respectively with cylindrical slots 126 106 and 126 u2032 106 u2032 for throttling flow fluid through inlet passageway 104 a seat 170 and outlet passageway 105 between fully closed and fully open positions the inlet passageway 104 includes a seat pocket 107 to receive seat 170 one of flat surfaces 123 123 u2032 of gate 121 is engaged with a front surface 173 of seat 170 for providing a seal support bar 145 can be constructed as solid round bar 146 or a spiral pin not shown in special conditions referring fig9 a bonnet 150.