Introduce AODD pump

Introduce AODD pump:

Diaphragm pumps are based on reciprocating piston pumps and evolved by adding diaphragm chambers. By receiving the control signal output by the modulation unit, the fluid flow can be changed by power operation. The power often used is air, electric device, liquid medium, etc.

The pneumatic diaphragm pump uses compressed air as the power source. It is a positive displacement pump whose volume changes due to the reciprocating deformation of the diaphragm. Its working principle is similar to that of a plunger pump. SAIKEN Pump Industry will introduce to you
The motor on the electric diaphragm pump drives the diaphragms on the left and right plungers to reciprocate one after the other through the reduction box. In the two pump chambers on the left and right, the movement of the diaphragms of the upper and lower four one-way ball valves causes the volume change in the working chamber, forcing the four one-way ball valves to open and close alternately, so as to continuously suck and discharge the liquid.

Pneumatic double diaphragm pump is only double diaphragm pump refers to double suction chamber, single diaphragm pump has one suction chamber. However, the pressure of the diaphragm pump cannot be increased and is limited by the pressure of the air source. Diaphragm pump flow is usually not too large, most of which are used in small systems. It is different from traditional centrifugal pumps used in large flow.

The selection of the valve body type of the diaphragm pump is the most important link in the selection of the diaphragm pump. There are many types of diaphragm pump valve bodies. Commonly used are straight single-seat, straight double-seat, angular, diaphragm, small flow, three-way, eccentric rotation, butterfly, sleeve, spherical, etc. 10 types. Before selecting a valve, it is necessary to carefully analyze the medium, process conditions and parameters of the control process, collect enough data, understand the system’s requirements for the diaphragm pump, and determine the type of valve to be used based on the collected data. In the specific selection, the following aspects can be considered:

(1) The spool shape and structure are mainly considered based on the selected flow characteristics and unbalanced force.

(2) Wear resistance. When the fluid medium is a suspension containing a high concentration of abrasive particles, the valve core and valve seat joint surface will be severely rubbed every time it is closed. Therefore, the flow path of the valve must be smooth, and the internal material of the valve must be hard.

(3) Corrosion resistance. Due to the corrosive nature of the medium, a valve with a simple structure should be selected as far as possible if the adjustment function can be met.

(4) The temperature and pressure of the medium. When the temperature and pressure of the medium are high and the changes are large, the valve core and valve seat materials should be selected with small changes in temperature and pressure.

(5) Prevent flashing and cavitation. Flashing and cavitation only occur in liquid media. In the actual production process, flashing and cavitation not only affect the calculation of the flow coefficient, but also cause vibration and noise, which will shorten the service life of the valve. Therefore, when selecting the valve, prevent the valve from flashing and cavitation.

Diaphragm pumps can absorb all kinds of corrosive liquids, liquids with particles, high-viscosity, volatile, flammable, and highly toxic liquids. It is reliable and low-cost to use pneumatic pumps in flammable and explosive environments, such as the transportation of fuel, gunpowder, and explosives. It can still work stably in harsh places such as construction sites and industrial and mining wastewater discharge environments.

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How to see the selection parameters of the diaphragm air pump

How do you look at the selection parameters of diaphragm air pumps? Any pump equipment selection needs to be selected based on the performance parameters of the model. Diaphragm pumps are no exception. They are also based on the flow, head, suction, working pressure, etc. required by the transportation project. Parameters can be selected according to actual needs. For details, please refer to the following content brought by SAIKEN Pump Industry.

At present, the diaphragm pump model and specifications are relatively abundant. When selecting the model, the user mainly focuses on the parameters such as flow, pressure, and suction. At the same time, according to the different working conditions and environment, decide which pump body material to choose. Currently, cast iron and aluminum are supported. The pump body is made of alloy, stainless steel, plastic, rubber lining and other materials. In addition, depending on the composition of the transportation medium, it is necessary to consider which material the diaphragm is used. Zhongcheng Pump provides diaphragms made of nitrile rubber, neoprene, fluorine rubber, polytetrafluoroethylene, food rubber and other materials.

In fact, users don’t have to worry about how to look at the selection parameters of the diaphragm air pump at all. They only need to inform SAIKEN pumps of their transportation needs to get professional and detailed selection guidance. SAIKEN can provide complete and mature after-sales technical services. , So that users have no worries.

After the above introduction, you must also have a certain understanding of how to look at the selection parameters of diaphragm air pumps. If you want to know other pump information, you can refer to other related content in the station.
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Application industries of air-operated double diaphragm pumps

Application industries of air-operated double diaphragm pumps

The application industry of AODD pumps is quite wide. The common ones are petrochemical and pharmaceutical machinery industries. The reason why diaphragm pumps are popular is that this pump product has unique characteristics and excellent comprehensive performance, which can replace a variety of common transportation equipment, such as It can be used as submersible pumps, self-priming pumps, mud pumps, canned pumps and other equipment in many situations.

Before understanding the application industry of the diaphragm air pump, it is necessary to have an understanding of its working characteristics and advantages. The diaphragm pump is a pneumatic pump. Unlike other motor pumps, which rely on power, it uses compressed air to achieve material discharge. Therefore, the motor is light and the whole pump is light, the internal structure is also very simple and compact, and the body is small, which brings great convenience to the use and installation. Moreover, according to actual working conditions, the pump body supports materials such as cast iron, stainless steel, aluminum alloy, and engineering plastics.

In terms of working performance, the adaptability of the diaphragm pump to the medium is comparable to that of a screw pump. At the same time, it can be self-primed, submersible, and can handle fluids with particles. It will not leak during transportation, and it will not heat up even if it is idling due to an accident. , It will not damage the pump even if it is running under load. It has an automatic protection function and has fewer internal components. It will not cause performance degradation due to component wear after long-term use like other pump products. It is an ideal transportation equipment at the moment.

Such a comprehensive performance, worry-saving and labor-saving transportation equipment is very popular in the current industrial field. The application industry of diaphragm air pumps is also increasing. It can be used to transport sewage in sewage ponds or other tunnels, and can suck more viscosity. High liquids, such as adhesives and glues, can also be used to transport hazardous media, such as various highly toxic, flammable, and volatile liquids. The pump’s tolerance to the medium is as high as 150°C, and it can handle transportation projects that many pumps cannot complete.

After the above introduction, I believe that you also have an intuitive understanding of the application industry of diaphragm air pumps. In short, the scope of application of this equipment is extremely wide, and because the motor is not used, it means that the use environment is not restricted. The remote corners of the power cord can be used freely.
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Disassembly steps of pneumatic diaphragm pump

Knowing the disassembly steps of the Air Operated Diaphragm Pumps can effectively sort out the faults and facilitate the maintenance of the stable progress of the transportation project. This is also the basic mechanical knowledge necessary for equipment operators. SAIKEN Pumps combines the previous dismantling experience of pneumatic diaphragm pumps and organizes the relevant operating steps for reference. For details, please refer to the following.

AODD pumps are well-known for their excellent comprehensive performance and wide versatility. They are stable and reliable in daily operation, and the failure rate is not high. However, long-term use and harsh working conditions will inevitably bring wear and tear, so it is necessary to know the pneumatic Perform necessary maintenance on the diaphragm pump after the disassembly steps, the relevant steps are as follows.

Mark the pump body and air chambers on the left and right sides of the pneumatic diaphragm pump before disassembling to avoid subsequent assembly errors;
Remove the fastening bolt connecting the outlet pipe and the pump body. After disassembly, you can directly see the two key components of the valve ball and the valve seat. You can check the signs of aging and wear to determine whether you need to replace new parts; Abnormal, it will cause abnormal pressure of the pump, irregular work, etc.;
Separate the intermediates of the outer pump body and the inner pump body. After disassembling the pump body, the status of the diaphragm can be checked. The integrity of the diaphragm is particularly important. If it is damaged, the medium will leak;
To check the diaphragm, you need to use tools to fix the edge of the diaphragm outer splint, separate the diaphragm device from the intermediate body, and then rotate clockwise to loosen the diaphragm device;
After removing the outer splint of the diaphragm, take out the shaft in the intermediate body, and use a tool to separate the shaft and the diaphragm device to check the wear of the splint and diaphragm of the shaft;
Use a wrench or other tools to open the valve to check the wear of the piston, oil seal, sealing ring, resistance rod and other components;

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Precautions for using AODD PUMP

Precautions for using AODD PUMP:
Pneumatic diaphragm pump is a positive displacement pump that uses compressed air as its power to change the volume through the reciprocating deformation of the diaphragm. Its working principle is similar to that of a plunger pump.
Pay attention to the following points when using a pneumatic diaphragm pump to operate:

Ensure that the largest particle contained in the fluid does not exceed the maximum safe passing particle diameter standard of the pump.
The intake pressure should not exceed the maximum allowable working pressure of the pump. Compressed air higher than the rated pressure may cause personal injury and property loss and damage the performance of the pump.
Ensure that the pump pressure piping system can withstand the highest output pressure reached, and ensure the cleanliness and normal working conditions of the driving air system.
Electrostatic sparks may cause explosions, resulting in personal injury and death accidents and property losses. If necessary, use a wire with a large enough cross-sectional area to properly and reliably ground the ground screw on the pump.
Grounding requirements comply with local laws and regulations and some special requirements on site.
Tighten the pump and all connecting pipe joints to prevent electrostatic sparks from being generated due to vibration, impact and rubbing. Use antistatic hose.
To periodically check and test the reliability of the grounding system, the grounding resistance is required to be less than 100 ohms.
Keep good exhaust and ventilation, away from flammable, explosive and heat sources.
AODD PUMP manufacturers and suppliers

Today we will talk about AODD PUMP

Today we will talk about AODD PUMP:
The installation method of the diaphragm in the Air operated double diaphragm pump, which does not affect the volume change requirements of the pump, and makes full use of the excellent pressure resistance of the diaphragm. It is carried out on the geometrical size of the diaphragm. It does not need to increase the cost and workload, and it does not need to increase the cost and workload. It can greatly improve the service life of the diaphragm, ensure the normalization of production and improve the quality of product production. It can be applied to the installation of diaphragms in various diaphragm pumps.
The diaphragm pump equipment system consists of one or more double-sided pumps, such as a pneumatic double diaphragm pump. The manifold on the pump is separated, so that each side of the pump pumps one component of the multi-component material, and an accumulator is connected to the outputs on both sides, so that the out-of-phase output of the pump becomes the same phase. Diaphragm isolation valves can be used on each side of the pump to prevent the mixed material from flowing back. If a mixing ratio other than 1:1 is required, more than one such pump can be used together to achieve a variety of mixing ratios.
The diaphragm failure monitoring system is used to detect the leakage of the diaphragm of the diaphragm pump. The system includes a pump that has a working chamber with working fluid inside; a pumping chamber for pumping materials into and out of the pump; and a diaphragm to isolate the working chamber from the pumping chamber. A first optical fiber is connected with the working chamber to transmit an optical signal through the working fluid. A second optical fiber is connected to the working chamber to receive the optical signal transmitted by the first optical fiber. An electrical signal establishment device that establishes the first electrical signal when the optical signal is transmitted from the first optical fiber, passes through the uncontaminated working fluid and reaches the second optical fiber. This electrical signal establishing device establishes a second electrical signal when the optical signal is transmitted from the first optical fiber, passes through the contaminated working fluid and reaches the second optical fiber. When the second electrical signal is established, according to this, the leakage of contaminated material through the diaphragm into the working chamber can be detected.

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Product features of AODD PUMP plastic diaphragm pump

Product features of AODD PUMP plastic diaphragm pump:

Since air is used as power, the flow rate is automatically adjusted with the change of back pressure (outlet resistance), which is suitable for medium and high viscosity fluids. The working point of the centrifugal pump is set based on water. If it is used for a fluid with a higher viscosity, a reducer or frequency converter is required, which greatly increases the cost. The same is true for gear pumps.
It is reliable and low-cost to use pneumatic pumps in flammable and explosive environments, such as the transportation of fuel, gunpowder, and explosives, because: first, it is impossible to generate sparks after grounding; second, there is no heat generation during work, and the machine does not It will overheat; third, the fluid will not overheat because the diaphragm pump has the least agitation to the fluid.
In places with harsh construction sites, such as wastewater discharge from construction sites and industrial mines, due to the large amount of impurities and complex components in the sewage, the pipeline is easy to be blocked, which will cause excessive load on the electric pump, and the electric motor will be easily damaged due to heat. The pneumatic diaphragm pump can pass particles and has an adjustable flow rate. When the pipeline is blocked, it will automatically stop until it is unobstructed.
In addition, the diaphragm pump is small in size and easy to move, does not require foundation, occupies a very small ground, and is easy and economical to install. It can be used as a mobile material conveying pump.
In the treatment of hazardous and corrosive materials, the diaphragm pump can completely isolate the materials from the outside world.
Or ensure that no impurities contaminate the raw materials in some tests.
It can be used to transport fluids with relatively unstable chemical properties, such as photosensitive materials, flocculants, etc. This is because the shear force of the diaphragm pump is low and the physical impact on the material is small.