A float valve, in particular for draining condensate in a medical compressed-air system, including: a float; a valve seat, which defines a valve opening having a valve opening cross-sectional area q.sub.A; and a closure element for opening and closing the valve opening cross-sectional area q.sub.A of the valve opening. The closure element can be controlled by means of the float between a completely open position X and a completely closed position Y. The closure element is elastic and is part of a partial opening mechanism, which is designed to successively open the valve opening cross-sectional area q.sub.A of the valve opening between the completely closed position Y and the completely open position X as a result of the elasticity of the closure element.

A float valve, in particular for draining condensate in a medical compressed-air system, including: a float; a valve seat, which defines a valve opening having a valve opening cross-sectional area q.sub.A; and a closure element for opening and closing the valve opening cross-sectional area q.sub.A of the valve opening. The closure element can be controlled by means of the float between a completely open position X and a completely closed position Y. The closure element is elastic and is part of a partial opening mechanism, which is designed to successively open the valve opening cross-sectional area q.sub.A of the valve opening between the completely closed position Y and the completely open position X as a result of the elasticity of the closure element.

A pump assembly is disclosed. The pump assembly including a pump having an outer casing having a first end, an opposing second end, and a cavity therein and a multi-function valve connected to the first end of the pump. The pump further including a discharge tube positioned in the cavity and exiting the first end of the outer casing; a check valve positioned in the cavity and operably connected to the discharge tube by a coupling; and a multi-float control assembly positioned in the cavity, the multi float control assembly including a bottom float check valve operably connected to the discharge tube by the coupling and an upper float check valve connected to a vent exiting the first end of the outer casing.

An oil suction pump contains: an oil storage cylinder, a pumping mechanism, and a cap. The pumping mechanism includes a body, a drive rod, a plug, and a pressure relief valve. The cap is disposed on the body and the oil storage cylinder, and the cap includes a connector. The drive rod has a press lever, the cap further includes a first air conduit, a first one-way valve assembly, and a second air conduit. The second air conduit has an inlet segment, an outlet opposite to the inlet segment, and a pump segment defined between the inlet segment and the outlet segment and communicating with the oil storage cylinder. The cap further includes a second one-way valve assembly accommodated in the oil storage cylinder and connected with the pump segment, and the second conduit accommodates a pressure reducing valve.

A filling head for an operating liquid tank, in particular of a motor vehicle, comprising a filling tube with an inlet end, which lies farther away from the tank, and an outlet end, which lies nearer to the tank, the filling tube for conducting operating liquid in a filling direction from the inlet end to the outlet end, a venting arrangement with an inflow end, which lies nearer to the tank and an outflow end which lies farther away from the tank, which end is provided for passing of gas in a counter-flow direction with respect to liquid flowing in the filling direction, in a venting direction extending from the inlet to the outflow end, the venting arrangement is provided, at least in the area of its outflow end, separate from the filling tube, the venting arrangement has a valve with a gas valve body, which is movable between a closed position, in which a gas flow in a valve passage is prevented, and a passage position, in which the gas may flow in the valve passage past the gas valve body, the valve having a liquid valve body, which is movable between a blocking position, in which a liquid flow in the valve passage is blocked, and an open position, in which the valve passage past the liquid valve body is open.

A negative pressure pipeline opening-and-closing device includes a blocking member and a buoyant member. The buoyant member comprises two floats and a connection rod connected to the two floats. The liquid reservoir is provided with a guide therein, and the guide confines the two floats, the blocking member and the liquid outlet port in the same vertical line. A limiting member is arranged between the two floats and is fixed to an inner wall of the liquid reservoir. A maximum distance between the limiting member and a top wall of a lower float of the two floats is smaller than a maximum distance between a top wall of an upper float of the two floats and a top wall of the liquid reservoir. The negative pressure pipeline opening-and-closing device can replace an existing electrically controlled valve. Therefore, the cost is reduced, the maintenance is convenient and service life is prolonged.

A negative pressure pipeline opening-and-closing device includes a blocking member and a buoyant member. The buoyant member comprises two floats and a connection rod connected to the two floats. The liquid reservoir is provided with a guide therein, and the guide confines the two floats, the blocking member and the liquid outlet port in the same vertical line. A limiting member is arranged between the two floats and is fixed to an inner wall of the liquid reservoir. A maximum distance between the limiting member and a top wall of a lower float of the two floats is smaller than a maximum distance between a top wall of an upper float of the two floats and a top wall of the liquid reservoir. The negative pressure pipeline opening-and-closing device can replace an existing electrically controlled valve. Therefore, the cost is reduced, the maintenance is convenient and service life is prolonged.

The present disclosure is directed to a combination air valve that uses buoyancy to lift seals into place, preventing media from escaping from the valve. Once the seals are in place, pipeline pressure is used to open and close the valve. The combination air valve includes a low flow vent configured with a pressure equalizing configuration allowing for reduced extrusion forces along the low flow vent, allowing vertical movement of a float shaft at high valve gas pressures with reduced forces.

The present disclosure is directed to a combination air valve that uses buoyancy to lift seals into place, preventing media from escaping from the valve. Once the seals are in place, pipeline pressure is used to open and close the valve. The combination air valve includes a low flow vent configured with a pressure equalizing configuration allowing for reduced extrusion forces along the low flow vent, allowing vertical movement of a float shaft at high valve gas pressures with reduced forces.

A venting and/or bleeding valve with a valve housing, a main valve arranged in the valve housing for rapid venting and bleeding of piping connected to the valve housing, an auxiliary valve arranged in the valve housing for operating ventilation of the piping at operating pressure, and a float arranged within the valve housing and controlling the main valve and the auxiliary valve as a function of the filling level of a fluid located in the valve housing. The venting and/or bleeding valve contains a valve position sensor for acquisition of the position of the main valve, at least one additional sensor for acquisition of the humidity and/or the pressure and/or of the temperature in an interior space of the valve housing, and an evaluation unit for acquisition of an operating state of the venting and/or bleeding valve as a function of the values acquired by the valve position sensor and any additional sensor.