Abstract: Closing element (1) of a gate valve (2) containing a closure plate (1.1) placed in the body (3) of said valve, said valve comprising a pipe segment (4), a side pocket (5) and guide rails (9), said closing element being slidingly movable along a displacement axis being perpendicular to the central fluid flow axis (x), wherein said closing element possesses at least two pairs of guiding projections (10) of the closure plate (1.1), wherein a pair of lower guiding projections (16) is found on a level that is closer to the lower face seal (14), and a pair of upper guiding projections (17) is found on a level that is closer to a cap (8) of a drive unit (6).

Abstract: A method of pumping a liquid using at least one operating tank (2), a pneumatic positive pressure displacement pump (1), which is based on the fact that during pumping, inflow valve (4) closure is controlled through the introduction of a control gas into the operating tank (2) positive pressure displacement pump (1) at a pressure lower than the pressure of the compressed actuating gas and from the hydrostatic pressure at the egress of the outflow valve but higher than the hydrostatic pressure on the ingress into the inflow valve (4), which causes the inflow valve (4) to close. A device for pumping liquids comprising at least one operating tank (2) of a positive pressure displacement pump (1), to which leads a control gas conduit (10) with a control valve (11) mounted thereon, which is used to close off the inflow valve (4), and the lower section of the operating tank (2) has a narrow section in the form of a vertical cylinder (16).

Abstract: In the device, according to the invention, the retention tank (7) constitutes a distributing chamber which is connected to the external retention tank (10) being a segment of a gravity-flow channel (11) with its cross-section greater than the cross-section of gravity waste water transfer required in the calculations, located on the line of waste water inflow to the retention tank (7), whereas the capacity of the retention tank (7) is at least two times smaller than the capacity of the external retention tank (10) constituting a segment of the gravity-flow channel (11) with its cross-section greater than the required cross-section of the gravity-flow channel (11) for gravity waste water transfer required in the calculations.

Abstract: In the valve according to the invention the supporting blind (6) of the deflected channel (5) is terminated at its free ends with the oblique surfaces (10), and the guiding rail (7) of the ball (4) is terminated with the supporting directional arrangement (8) directing the ball (4) toward the supporting blind (6) of the deflected channel (5), and the top (9), which is positioned closer to the valve outlet than to the inlet, and together with the oblique surfaces (10) of the supporting blind (6) of the deflected channel (5) produce a slot (11) widening itself to the direction of deflected channel (5) interior.

Abstract: A method of pumping a liquid using at least one operating tank (2), a pneumatic positive pressure displacement pump (1), which is based on the fact that during pumping, inflow valve (4) closure is controlled through the introduction of a control gas into the operating tank (2) positive pressure displacement pump (1) at a pressure lower than the pressure of the compressed actuating gas and from the hydrostatic pressure at the egress of the outflow valve but higher than the hydrostatic pressure on the ingress into the inflow valve (4), which causes the inflow valve (4) to close. A device for pumping liquids comprising at least one operating tank (2) of a positive pressure displacement pump (1), to which leads a control gas conduit (10) with a control valve (11) mounted thereon, which is used to close off the inflow valve (4), and the lower section of the operating tank (2) has a narrow section in the form of a vertical cylinder (16).

Abstract: The subject of the present invention is a pump-hydrant quick-connector (1) possessing an inflow/outflow conduit (2) terminating with a sealing flange (3) made in the form of a symmetrical funnel (6) widened at one end, and a compression pipe (5) possessing a guiding element (7), which determines the essentially co-axial positioning of the compression pipe (5) with a sealing piston (4), upon its connection to and disconnection from the interior surface of the symmetrical funnel (6) of the sealing flange (3). A subject of the present invention is also a pump station containing the pump-hydrant quick-link (1), which is connected directly to the side wall of the tank (36).

Abstract: In the device, according to the invention, the retention tank (7) constitutes a distributing chamber which is connected to the external retention tank (10) being a segment of a gravity-flow channel (11) with its cross-section greater than the cross-section of gravity waste water transfer required in the calculations, located on the line of waste water inflow to the retention tank (7), whereas the capacity of the retention tank (7) is at least two times smaller than the capacity of the external retention tank (10) constituting a segment of the gravity-flow channel (11) with its cross-section greater than the required cross-section of the gravity-flow channel (11) for gravity waste water transfer required in the calculations.

Abstract: In the valve according to the invention the supporting blind (6) of the deflected channel (5) is terminated at its free ends with the oblique surfaces (10), and the guiding rail (7) of the ball (4) is terminated with the supporting directional arrangement (8) directing the ball (4) toward the supporting blind (6) of the deflected channel (5), and the top (9), which is positioned closer to the valve outlet than to the inlet, and together with the oblique surfaces (10) of the supporting blind (6) of the deflected channel (5) produce a slot (11) widening itself to the direction of deflected channel (5) interior.