A pump equipped with a plurality of systems includes a first system and a plurality of second systems, each of the plurality of systems containing an enclosed gas placed in contact with an internal liquid, it being possible for the enclosed gas to be placed at a depressed pressure or at a raised pressure in relation to the pressure of surroundings external to the system by variations in level of the liquid. The respective liquid environments of the plurality of systems are connected continuously so that compression or depression of the gas enclosed in the first system leads to successive variations in the levels of liquid in the second systems following successive applications of raised pressure or depressed pressure to the gases contained in the plurality of systems so as to allow the pumping of an external liquid in contact with the internal liquid of one of the systems.

A pump equipped with a plurality of systems includes a first system and a plurality of second systems, each of the plurality of systems containing an enclosed gas placed in contact with an internal liquid, it being possible for the enclosed gas to be placed at a depressed pressure or at a raised pressure in relation to the pressure of surroundings external to the system by variations in level of the liquid. The respective liquid environments of the plurality of systems are connected continuously so that compression or depression of the gas enclosed in the first system leads to successive variations in the levels of liquid in the second systems following successive applications of raised pressure or depressed pressure to the gases contained in the plurality of systems so as to allow the pumping of an external liquid in contact with the internal liquid of one of the systems.

A multifunctional air extraction boosting pump includes an upper cover, two positioning rings mounted in the upper cover, a control valve mounted in the upper cover, an air inlet pipe connected with the upper cover, and a container connected with the upper cover. One of the positioning rings is initially mounted in the upper cover. Then, the control valve is mounted in the upper cover. Then, the other one of the positioning rings is mounted in the upper cover. Then, the air inlet pipe is mounted on the upper cover. Thus, the air extraction boosting pump is assembled easily and conveniently.

A multifunctional air extraction boosting pump includes an upper cover, two positioning rings mounted in the upper cover, a control valve mounted in the upper cover, an air inlet pipe connected with the upper cover, and a container connected with the upper cover. One of the positioning rings is initially mounted in the upper cover. Then, the control valve is mounted in the upper cover. Then, the other one of the positioning rings is mounted in the upper cover. Then, the air inlet pipe is mounted on the upper cover. Thus, the air extraction boosting pump is assembled easily and conveniently.

A simple pneumatic ejector pump system allows for efficient transfer of a fluid such as water and has an air release port check valve assembly that opens as the chamber of the X-Pump empties so that it rapidly fills with water again. The air release port check valve assembly works with a check valve on a siphon tube to ensure that the pumping process occurs smoothly and at high efficiency.

A simple pneumatic ejector pump system allows for efficient transfer of a fluid such as water and has an air release port check valve assembly that opens as the chamber of the X-Pump empties so that it rapidly fills with water again. The air release port check valve assembly works with a check valve on a siphon tube to ensure that the pumping process occurs smoothly and at high efficiency.

A method and a dense phase powder pump for conveying coating powder from a first powder reservoir to a second downstream powder reservoir or to a downstream powder spray-coating gun or the like installation for spraying coating powder are disclosed. In order to reduce the number of components of the dense phase powder pump that require maintenance, the dense phase powder pump is designed as a single-chamber dense phase powder pump and has only a single powder conveyor chamber for conveying coating powder.

A method and a dense phase powder pump for conveying coating powder from a first powder reservoir to a second downstream powder reservoir or to a downstream powder spray-coating gun or the like installation for spraying coating powder are disclosed. In order to reduce the number of components of the dense phase powder pump that require maintenance, the dense phase powder pump is designed as a single-chamber dense phase powder pump and has only a single powder conveyor chamber for conveying coating powder.

A pressure-controlling device (10) includes a pump (21), a connection pipe (30), a first valve (41), and a second valve (42). The pump (21) has an inlet port (211) and an outlet port (212). The connection pipe (30) has a first end in communication with the outlet port (212), and a second end in communication with the inlet port (211) and that has a first space (31) that contains the first end, a second space (32) that contains the second end, and a third space (33) that is located between the first space (31) and the second space (32).

A multifunctional air extraction boosting pump includes an upper cover, two positioning rings mounted in the upper cover, a control valve mounted in the upper cover, an air inlet pipe connected with the upper cover, and a container connected with the upper cover. One of the positioning rings is initially mounted in the upper cover. Then, the control valve is mounted in the upper cover. Then, the other one of the positioning rings is mounted in the upper cover. Then, the air inlet pipe is mounted on the upper cover. Thus, the air extraction boosting pump is assembled easily and conveniently.