Is there a difference between a diaphragm air pressure tank and a non negative pressure tank?

There is a difference between a diaphragm pressure tank and a non-negative pressure tank, and the specific differences are as follows:

1. Differences in working principles.

The working principle of the diaphragm pneumatic tank is that the rubber diaphragm completely separates the water chamber from the air chamber, when the external pressure water is filled into the inner tank of the diaphragm pneumatic water tank, the air sealed in the tank is compressed, according to Boyle's gas law, the volume of the gas becomes smaller after compression, the pressure rises to store energy, and the compressed gas expansion can press the water in the rubber diaphragm out of the tank.

The working principle of the non-negative pressure tank is that the water inlet is connected with the tap water pipe network, the water outlet is connected to the water pump to the user, the tap water enters the non-negative pressure tank, the water level in the tank rises to a certain position, and the non-negative pressure valve is connected to the water level signal and the automatic exhaust valve is closed.

Pressure is formed in the non-negative pressure tank. The water in the pipe network continues to enter, and the pressure in the non-negative pressure tank gradually increases until the pressure in the non-negative pressure tank and the inlet pipe network are balanced, and the water level in the tank is stable.

2. Differences in characteristics.

The characteristics of the diaphragm pneumatic tank are that the internal diaphragm structure of the tank ensures that the water does not contact with the tank wall, so there is no rust inside the tank wall, no condensation outside, and the service life is greatly extended; The rubber diaphragm can be dilated more than 200,000 times, and can be used for a long time after inflation; It can effectively smooth the pressure fluctuation in the water system and reduce the start and stop frequency of the water pump; The diaphragm is made of food-grade natural rubber.

Diaphragms can be used in drinking water systems.

The non-negative pressure tank is made of excellent material, using L, 321 and other stainless steel materials.

Manufactured, the upper and lower oval heads, after precision manual mirror polishing; Welding process.

Precision, mainly fish pattern welding and seamless welding two processes, both of which use stainless steel beads with the same stainless steel tank material as welding materials; The specifications are complete, and stainless steel tanks of different specifications and different stainless steel materials can be customized.

3. Differences in composition.

The diaphragm air pressure tank is an energy storage device composed of a steel shell and a rubber diaphragm liner.

The non-negative pressure air pressure tank is mainly composed of a cylinder, a suction pipe, a water inlet pipe of the water receiving pump, a water injection pipe, an overflow pipe and a valve.

If you do not understand the performance and structural characteristics of the diaphragm pressure tank before it is simply selected and used, it may be misleading and cause unnecessary losses. 1. Classification of diaphragm pressure tanks: 1

There are two types of appearances: vertical and horizontal. The smaller diameter of the vertical tank is usually 400mm, the larger diameter is 2400mm, and the diameter of the horizontal tank is generally larger, with a volume of more than 10 cubic meters. The diameter is usually 1800mm-2000mm, and the length is usually around 3500mm-5000mm.

Of course, it can also be customized to a larger one, depending on customer requirements and design requirements. 2. There are two kinds of materials: stainless finch pants steel and carbon steel. 3. There are two kinds of structural forms: diaphragm single port and double port, balloon single port and balloon single port.

2. The working principle of the diaphragm pressure tank: The diaphragm pressure tank is an energy storage container composed of a steel shell and a rubber diaphragm lining. A rubber diaphragm completely separates the water chamber from the air chamber.

When the inner tank of the diaphragm is filled with external pressure, according to Boyle's gas law, the amount of gas decreases after compression, the pressure rises to store energy, and the expansion of the compressed gas presses the water out of the tank. 3. Scope of application of diaphragm pressure tank: Diaphragm pressure tank is widely used in air conditioning circulating water stabilization, distilled water expansion system, heating system circulating water supply stability, fire grass water supply system water supply stability, frequency conversion water stabilization, boiler water supply, pneumatic water supply, etc.

4. Features and advantages of diaphragm type air pressure tank equipment: The internal diaphragm structure of the diaphragm air pressure tank can prevent water from contacting the tank wall, thereby preventing rust inside the tank wall and external condensation, and greatly prolonging its service life.

Want to know which is better, diaphragm pressure tank or capsule pressure tank? It is necessary to know the internal structure of these two pressure tanks. The following Nanjing Jiedeng tells you how to judge.

Diaphragm pressure tanks have a hot-rolled diaphragm in the middle of the tank, while capsule pressure tanks have an air bag built into the tank and are flanged at the mouth of the tank.

1.Because the shell of the diaphragm water supply pressure tank is in direct contact with the water, the shell is sprayed with an anti-rust layer. The interface of the tank and the shell are welded branches.

In this way, during the welding process, the high temperature will oxidize the anti-rust coating. It was originally a silvery-white coating, but it was black after welding. When touched by hand, you can feel small black particles.

So these seemingly insignificant oxidation points work in contact with water for a long time, and slowly rust and gradually expand until the whole tank is rusty, why this kind of water supply pressure tank is used for a period of time, and the water poured out is not surprising.

2.The inner membrane of the diaphragm water supply pressure tank is fixed in the middle of the carbon steel of the two half-shells of the water supply pressure tank by hot rolling, if this process is not handled well, it will leave tiny pores between the inner membrane and the carbon steel, and these tiny pores will leak out the prefilled gas, and if the water supply pressure tank brigade leaks gas, 90% is leaked from here. This kind of leaky water supply pressure tank is used for a period of time, if the gas is no longer replenished, the orange can not play the role of constant pressure unloading.

And this in itself is very difficult to detect. Since the thickness of the tank wall is generally about 1mm, the interface is directly welded to the tank, and the torque that this connection method can withstand is quite small. When installing the tank, you can only hold the housing and rotate, so that if the force is too large or too violent, the interface will be broken.

This is most common in the production of air conditioners.

The air bag type water supply pressure tank solves the above problems very well, so the air bag structure is basically on the market now.

A make-up pressure tank is an iron tank with a hole and a small make-up tank; But in a diaphragm or capsule pressure tank, one or two rubber pads are fixed with flanges at the top and bottom or in the middle, because there are capsules or diaphragms in the iron can.

The pressure tank is used in the closed water circulation system, which plays a role in balancing the water volume and pressure, avoiding the frequent opening of the safety valve and the frequent replenishment of the automatic water supply valve. In addition to the expansion tank to hold the expansion water, it can also play the role of a water supply tank, the expansion tank is filled with nitrogen, and a larger volume can be obtained to accommodate the expansion water, and the high and low pressure expansion tank can use its own pressure to supplement water to the pressure stabilization system in parallel. Each point control of this device is interlocking reaction, automatic operation, small pressure fluctuation range, safe and reliable, energy saving, good economic effect.

A make-up pressure tank is an iron can, which may have a manhole, plus a small make-up tank, but a diaphragm or capsule pressure tank, with one or two rubber pads fixed with flanges at the top and bottom or in the middle, because there are capsules or diaphragms in the iron can.

Hello dear! Glad for your question: I have inquired for you that the diaphragm pressure tank is an auxiliary equipment used in the pump system, the main function is to balance the pressure change generated by the pump during the working process, and protect the safe operation of the pump and pipeline system.

The diaphragm pressure tank is divided into two parts, one is the container where the water is placed, and the other is the air detection cavity isolated from the water. When the water pump is running, the water is pumped into the tank, so that the air in the air cavity is compressed, and when it reaches a certain pressure, the water pump automatically stops working. When water is used, the water flows out of the tank, and as the water decreases, the pressure in the air cavity gradually returns to its original level, so that the water pump works automatically and maintains a stable pressure in the system.

As a result, diaphragm pneumatic tanks can increase the efficiency and longevity of the pump while reducing the occurrence of water hammer in the piping system.

Diaphragm air pressure tank is a kind of pressure stabilizing equipment, which is mainly used in air conditioning circulating water stabilization, steaming water expansion system, heating system circulating water replenishment and stabilization, fire water supply system water replenishment and stabilization, frequency conversion water supply and water stabilization, boiler water replenishment, pneumatic water supply and other occasions.

Working principle: The diaphragm air pressure tank is an energy storage device composed of steel shell and rubber diaphragm liner, the rubber diaphragm completely separates the water chamber from the air chamber, when the external pressure water is filled into the inner tank of the diaphragm air pressure water tank, the air sealed in the tank is compressed, according to Boyle's gas law, the volume of gas becomes smaller after compression, the pressure rises to store energy, and the compressed gas expansion can press the water in the rubber diaphragm out of the tank.

Scope of application: Diaphragm type air pressure tank is widely used in air conditioning circulating water stabilization, steaming water expansion system, heating system circulating water replenishment and stabilization, fire water supply system water replenishment and stabilization, frequency conversion water supply and water stabilization, boiler water supply, pneumatic water supply and other occasions.

Performance characteristics:1The internal diaphragm structure of the tank ensures that the water is not in contact with the tank wall, so there is no rust inside the tank wall, no condensation outside, and the service life is greatly extended.

2.The rubber diaphragm can be dilated more than 200,000 times, and can be used for a long time after inflation;

3.It can effectively smooth the pressure fluctuation in the water system and reduce the start and stop frequency of the water pump;

4.The diaphragm is a food-grade natural rubber diaphragm that can be used in drinking water systems.

Diaphragm pressure tank is now not produced in the industry, this technology is about to be eliminated, because the diaphragm pressure tank is half of the tank body in direct contact with water when working, so that for a long time, the tank body is rusty, not to mention the short service life of the air pressure tank also causes water pollution, which gives users a very bad feeling. At present, the air pressure tank adopts air bag technology, so that the tank is not in direct contact with the water, which prolongs the life of the tank and ensures the water quality