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Pressure expansion tank

Brief description:A pressure expansion tank consists of an energy storage device made of a steel shell and a rubber diaphragm inner tank. The rubber diaphragm completely separates the water chamber from the air chamber. When pressurized water from outside fills the inner tank of the pressure expansion tank, the sealed air inside the tank is compressed. According to Boyle's gas law, when the gas is compressed, its volume decreases and the pressure rises to store energy. The compressed gas expands and can push the water inside the rubber diaphragm out of the tank. Scope of application: Pressure expansion tanks are widely used for central air conditioning circulating water pressure stabilization,

Basic Information

Update time

06-14-2026

View count

16
Detailed Introduction

A pressure expansion tank is an energy storage device composed of a steel shell and a rubber diaphragm inner tank. The rubber diaphragm completely separates the water chamber and the gas chamber. When water under pressure from the outside is filled into the inner tank of the pressure expansion tank, the air sealed inside the tank is compressed. According to Boyle's gas law, the volume of the compressed gas decreases, and the pressure increases to store energy. The compressed gas expansion can push the water inside the rubber diaphragm out of the tank.

Scope of adaptation:

Pressure expansion tanks are widely used in central air conditioning circulating water stabilization, steam water supply expansion systems, heating system circulating water replenishment and stabilization, fire water supply system replenishment and stabilization, variable frequency water supply and stabilization, boiler replenishment, pneumatic water supply and other occasions.

Equipment characteristics:

The diaphragm structure inside the tank ensures that water does not come into contact with the tank wall, so there is no rust inside the tank wall and no condensation outside, greatly extending its service life.

The rubber diaphragm can dilate more than 200000 times and can be used for a long time after inflation.

It can effectively smooth out pressure fluctuations in the water system and reduce the start stop frequency of the water pump.

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