A gate valve comprising a closing element, the closing element being placed in a body of said gate valve, said body comprising a pipe segment and a side pocket as well as guide rails, said closing element being slidingly movable along a displacement axis (Y-Y) being perpendicular to a central fluid flow axis (X-X) of the gate valve, said displacement axis being contained in a displacement plane (Z-Z) in the body of this valve, and said displacement plane being situated transversely to the central fluid flow axis (X-X), the closing element containing the following: - a closure plate (1.1) with a drive unit installed in it in the form of a cap and a drive spindle, a face seal comprised of lower and upper face seals (14,12), wherein the upper face seals are located closer to the cap and they are situated in such a manner, so that they collaborate to provide sealing adequately with the inclined surfaces of the pipe segment that are directed inwards, and oriented in the direction from the inlet side and from the outlet side, and wherein the lower face seal is constructed in such a manner so that it collaborates to provide sealing with the inclined surfaces that are directed inwards as well as with a clamping surface of the pipe segment that is oriented inwards radially or partly radially; - at least two pairs of guiding projections on both sides of the closure plate (1.1) configured to be contained in the displacement plane in the body of this valve, and to collaborate with the corresponding guide rails of the valve body, wherein a pair of lower guiding projections is situated on a level that is closer to the lower face seal, and a pair of upper guiding projections is situated on a level that is closer to the cap of the drive unit, so that upper edges (17.1) of the pair of the upper guiding projections, which are closer to the cap of the drive unit, are situated on a level that is above the top (12.1) of the upper face seal, characterized in that the smallest distance from the lower edges (16.1) of the pair of the lower guiding projections to the upper edges (17.1) of the pair of upper guiding projections is greater than 70% of the dimension of the diameter of a cylindrical part of the pipe segment. - a closure plate (1.1) with a drive unit installed in it in the form of a cap and a drive spindle, a face seal comprised of lower and upper face seals (14,12), wherein the upper face seals are located closer to the cap and they are situated in such a manner, so that they collaborate to provide sealing adequately with the inclined surfaces of the pipe segment that are directed inwards, and oriented in the direction from the inlet side and from the outlet side, and wherein the lower face seal is constructed in such a manner so that it collaborates to provide sealing with the inclined surfaces that are directed inwards as well as with a clamping surface of the pipe segment that is oriented inwards radially or partly radially; - at least two pairs of guiding projections on both sides of the closure plate (1.1) configured to be contained in the displacement plane in the body of this valve, and to collaborate with the corresponding guide rails of the valve body, wherein a pair of lower guiding projections is situated on a level that is closer to the lower face seal, and a pair of upper guiding projections is situated on a level that is closer to the cap of the drive unit, so that upper edges (17.1) of the pair of the upper guiding projections, which are closer to the cap of the drive unit, are situated on a level that is above the top (12.1) of the upper face seal,