A float type drain trap in which an inlet, a valve chamber, and an outlet are formed in a valve casing, a valve seat member, a discharge passage, a float, an operation member, a valve member that communicates between the periphery anterior to and the periphery posterior to the middle portion of the operation member when the operation member is in the advanced position and that blocks the periphery anterior to and the periphery posterior to the middle portion of the operation member from one another when the operation member is in the most retracted position is provided to the middle portion of the operation member, and a blow passage formed to communicate the periphery posterior to the valve member of the operation member with the outside distinct from the outlet.

A nozzle-type steam trap including a venturi nozzle, an orifice nozzle, or a tunnel structure resistance nozzle minimizes the outflow of steam even when a pressure difference between a drain-water inlet and a drain-water outlet of each nozzle fluctuates, the steam trap being compatible with any usage environments and enabling maintenance and inspection to be easily performed. The nozzle-type steam trap including the venturi nozzle, the orifice nozzle, or the tunnel structure resistance nozzle includes a means for sealing the nozzle by using a drain water. The nozzle-type steam trap further includes a plurality of steam inflow ports and drain-water outflow ports and includes a closure means for determining, for a selected one of the steam inflow ports and a selected one of the drain-water outflow ports, passages of steam and drain water. More preferably, the steam trap includes a swirl flow formation means in the vicinity of the nozzle.

A pumping and trapping device is provided. The pumping and trapping device removes condensate from a heat exchanger even when upstream pressure in the device is lesser than the downstream pressure. The device includes a float operated mechanical linkage. The float is displaceable with respect to condensate level within a vessel of the device. The mechanical linkage is configured to selectively operate a steam inlet port and a steam outlet port configured on the vessel, thereby removing condensate accumulated within the vessel.

The present invention relates to a bellows-type steam trap that comprises: a steam trap body having an inflow port formed at one side thereof, to which an inflow pipe is connected, and a discharge port formed at the other side thereof, to which a discharge pipe is connected, wherein a channel through which steam passes is formed between the inflow port and the discharge port; and a valve body which is installed in the steam trap body and can expand or contract to open or close the channel.

A nozzle-type steam trap including a venturi nozzle, an orifice nozzle, or a tunnel structure resistance nozzle minimizes the outflow of steam even when a pressure difference between a drain-water inlet and a drain-water outlet of each nozzle fluctuates, the steam trap being compatible with any usage environments and enabling maintenance and inspection to be easily performed. The nozzle-type steam trap including the venturi nozzle, the orifice nozzle, or the tunnel structure resistance nozzle includes a means for sealing the nozzle by using a drain water. The nozzle-type steam trap further includes a plurality of steam inflow ports and drain-water outflow ports and includes a closure means for determining, for a selected one of the steam inflow ports and a selected one of the drain-water outflow ports, passages of steam and drain water. More preferably, the steam trap includes a swirl flow formation means in the vicinity of the nozzle.

A pumping and trapping device is provided. The pumping and trapping device removes condensate from a heat exchanger even when upstream pressure in the device is lesser than the downstream pressure. The device includes a float operated mechanical linkage. The float is displaceable with respect to condensate level within a vessel of the device. The mechanical linkage is configured to selectively operate a steam inlet port and a steam outlet port configured on the vessel, thereby removing condensate accumulated within the vessel.

A condensate drain is described. The condensate drain comprises a thermodynamic actuator and a closing arrangement. The closing arrangement is configured to switch a fluid connection between a first connector and a second connector of the condensate drain in a thermodynamically controlled manner by the thermodynamic actuator. In order to achieve an improved cleaning capability, the condensate drain further comprises an adjusting device attached to the closing arrangement, wherein the adjusting device switches the fluid connection between the first connector and the second connector. A processing system simplified by the condensate drain is also described.

An automatic drain discharge utilizing a vertically movable float to activate a diaphragm of a pilot valve to drive a drain plug. The inner diameter at the bottom of a case is gradually decreased from upper to lower positions. A bottom surface of a communication hole of a drain housing provided in an opening of the case has an inclined surface inclined toward a drain discharge hole. An outer marginal portion which is positioned at the uppermost position in the bottom surface of the communication hole is in the same plane as or lower than a marginal portion which is positioned at the lowermost position in an inner circumferential surface of the case and adjacent to the opening.

The present invention relates to a bellows-type steam trap that comprises: a steam trap body having an inflow port formed at one side thereof, to which an inflow pipe is connected, and a discharge port formed at the other side thereof, to which a discharge pipe is connected, wherein a channel through which steam passes is formed between the inflow port and the discharge port; and a valve body which is installed in the steam trap body and can expand or contract to open or close the channel.

A drain valve including a housing having a float chamber, a piston chamber, and a plenum communicating with the piston chamber through a seat. The housing has a liquid inlet passage, and an outlet port. The drain valve has a tube passage communicating with the piston chamber. The drain valve includes an annular float. The drain valve includes a seal body connected to the float and rising away from the tube passage when liquid is in the float chamber. The drain valve includes a piston slidably mounted in the piston chamber having a head that moves away from the seat when gas enters the piston chamber. The piston includes a valve element that moves as the piston head moves to expose the liquid inlet port and allow liquid to flow from the liquid inlet passage through the plenum and into the liquid outlet passage.