A water supply system for delivering water from a water inlet manifold to a water outlet manifold, comprises a first water inlet pipe, an air pressure water tank and a first water pump; the first water inlet pipe is connected to the water inlet manifold; the air pressure water tank is connected between the first water inlet pipe and a water suction pipe of the first water pump; a water outlet pipe of the first water pump is connected to the water outlet manifold; the air pressure water tank is provided with a preset first water level; and the quantity of gas compressed in the air pressure water tank allows a pressure inside the air pressure water tank to be an atmospheric pressure when water in the air pressure water tank is in the first water level.

A water supply system for delivering water from a water inlet manifold to a water outlet manifold, comprises a first water inlet pipe, an air pressure water tank and a first water pump; the first water inlet pipe is connected to the water inlet manifold; the air pressure water tank is connected between the first water inlet pipe and a water suction pipe of the first water pump; a water outlet pipe of the first water pump is connected to the water outlet manifold; the air pressure water tank is provided with a preset first water level; and the quantity of gas compressed in the air pressure water tank allows a pressure inside the air pressure water tank to be an atmospheric pressure when water in the air pressure water tank is in the first water level.

A system for reducing an amount of volatile organic compounds which includes: a water-storage tank having a tank containing water, a roof positioned over the tank, and a headspace region formed between the roof and a surface of the water contained in the tank; an air exchange system positioned at least partially in the headspace region that is configured to exchange air exterior to the tank with air inside the tank; and a water conveyance device located at least partially in the water of the water-storage tank and which is configured to convey water in a manner that produces a surface flow velocity. A method reducing an amount of volatile organic compounds is also included.

A system for reducing an amount of volatile organic compounds which includes: a water-storage tank having a tank containing water, a roof positioned over the tank, and a headspace region formed between the roof and a surface of the water contained in the tank; an air exchange system positioned at least partially in the headspace region that is configured to exchange air exterior to the tank with air inside the tank; and a water conveyance device located at least partially in the water of the water-storage tank and which is configured to convey water in a manner that produces a surface flow velocity. A method reducing an amount of volatile organic compounds is also included.

The present disclosure relates to a hydrostatically adjustable flow control valve. In one embodiment, the valve includes a fixed sleeve that slidably receives a spool. A spring biases the spool relative to the fixed sleeve. A primary orifice is used to deliver fluid to the interior area of the fixed sleeve and spool. A control device is used to selectively vary the rate at which fluid drains from the interior area. Draining the fluid results in the spool being received within the interior of the fixed sleeve. The movement of the spool opens flow ports within the sleeve. This, in turn, allows fluid to exit the valve. Conversely, the control device can be set to prevent fluid drainage. This results in the spool extending from interior of the fixed sleeve, the closure of the flow ports, and the sealing of the valve.

The present disclosure relates to a hydrostatically adjustable flow control valve. In one embodiment, the valve includes a fixed sleeve that slidably receives a spool. A spring biases the spool relative to the fixed sleeve. A primary orifice is used to deliver fluid to the interior area of the fixed sleeve and spool. A control device is used to selectively vary the rate at which fluid drains from the interior area. Draining the fluid results in the spool being received within the interior of the fixed sleeve. The movement of the spool opens flow ports within the sleeve. This, in turn, allows fluid to exit the valve. Conversely, the control device can be set to prevent fluid drainage. This results in the spool extending from interior of the fixed sleeve, the closure of the flow ports, and the sealing of the valve.