Pressure Tanks with Replaceable Membrane Series VAV 200-500

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Modern Pumps Co

Jeddah, Saudi Arabia

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The pressure tank with replaceable membrane is an element used in hydraulic applications for sanitary water circuits, such as pressure groups in combination with pumps or devices such as anti-water hammer.

The main purpose of the pressure tank is to give water at a steady pressure, in order to limit the pump hourly starts, safeguarding its working and electricity consumption. This is possible thanks to precharged air pressure stored between the membrane and the internal metal surface of the tank. When the pressure increases, the air cushion compresses letting the water filling in the tank, and then keeping it under pressure to be reused when the user requests it. The shape of pressure tank can be vertical or horizontal. Pressure tank can have a max working pressure that changes according to the needs of the system; it can be also available in galvanized or AISI 304 stainless steel for high quality performance.

Mechanism

Once the system is working, the pressure of the pump lets the water filling in the bladder inside tank.
When the pressure reaches its maximum threshold value, the pump stops. Inside the tank there is the maximum quantity of water. When the membrane expands, it occupies all the volume of the tank. If water is required by the system, it starts flowing out of the tank without using the pump but just using the pressure in the air cushion.
As the process is going on, the membrane deflates until the pressure reaches its minimal threshold value. At this point the membrane is back to its initial dimensions, the pump starts again and a new cycle begins.