DEFU AOK series diaphragm pumps are same as USA GRACO diaphragm pump which can be interchanged with same performance, with high quality. Our air operated double diaphragm pumps (AODD) have many benefits over other pump technologies: l Simple installation l Easy to operate and run l Portable l Self-priming l Submersible l Dry running l Can pump dirty liquids or liquids with particles l Abrasive liquid handling l Viscous fluid pumping l Can pump shear sensitive liquids l Affordable compared to other positive displacement technologies l Low maintenance and running cost DEFU AOK Series design also incorporates its own additional unique features including a lubrication-free, non-stalling air valve, ideal for numerous applications and environments. The air valve contains very few components compared to other air valves in the market, reducing servicing time, maintenance costs and downtime. TYPICAL INDUSTRIES...

Self Priming Diaphragm Pumps are positive displacement pumps commonly used in wet commercial pumping applications. Air diaphragm pumps run on compressed air and there are ideal for chemical transfer.  Below are the reasons of AODD Pumps are perfect for chemical transfer.  1. SAFE, LEAK-FREE BOLTED CONSTRUCTION AODD pumps are available in leak-free bolted designs to ensure the chemical being pumped is contained safely. 2. DO NOT GENERATE HEAT AODD pumps don't generate heat, which further reduces the potential of a safety hazard occurring. 3. NO ELECTRICITY REQUIRED AODD pumps require no electricity and can be grounded for safe, reliable operation in explosive environments. This is critical for safety when pumping flammable liquids or when a pump is in an environment in which fumes are present. 4. RUN-DRY CAPABILITY AODD pumps will not be damaged by running dry, which is very common in chemical sumps, tanker unloading or tank over applications. Other types of pumps ca...

AODD pumps are one of the safest and most effective options on the market today, making them the optimal choice for handling many chemicals. It’s also called Chemical diaphragm pump. Chemical transfer can refer to a lot of things. That's because when you talk about "chemicals," you can be referring to everything from household staples, like hydrogen peroxide and calcium chloride, to toxic substances, like arsenic and formaldehyde. Known for their versatility and ability to withstand the harshest environments and applications, air diaphragm pumps are considered by many to be the best choice for chemical transfer applications. When it comes to pumping chemicals, materials widely used in pumps for chemical transfer include polypropylene (fitted with PTFE or Santoprene diaphragms. Santoprene is very popular because of its excellent chemical resistance, flex life, abrasion resistance and low cost. Stainless steel units are a great choice because they work well in outside con...

Pumps are pieces of equipment or machinery designed to move slurries, liquids or gases. There are a lot of different types of pumps available and different pumps work in different ways. Our double diaphragm pump is reciprocating type, driven by air. Diaphragm pumps are categorized under the most common types of industrial pumps. It makes use of the so-called positive displacement method in order to move a liquid from one location to another. The diaphragm pump can be used as drum pump, put the suction pipe into a drum or barrel. The operation is easy. The air diaphragm pump has the function of self priming without rotating parts. It can achieve dry priming and wet priming, which self-priming height is 5m and 8m respectively. Below is a schematic diagram of the installation of the pump.                     If you are in need of this high viscosity diaphragm pump, pls contact with Ms Cindy(sales9@defupump.com) freely. We will in...

DEFU Powder Pumps were specifically designed to move bulk solids more effectively throughout your process. They are a cost effective replacement for Augers and Conveyors and eliminate unsafe and labor intensive means of moving bulk powders. These Powder pumps consistently transfer fine-grained (less than 75 microns), low bulk density (less than 880 kg/m³), dry powders in a dust-free operation. Pneumatic powder transfer pump features DEFU's pneumatic powder conveying systems deliver and handle dry-process powders quickly and cleanly， at a fraction of the cost of associated conventional installed "systems". Application It is suitable for conveying ultra-fine, light and dry powders. It is required that the particle size of the powder is less than 75 microns, the bulk density is less than 880 kg/m³, and the powder is dry and has good fluidity. Parameter Description The fluidity, particle size and dispersibility of powders vary greatly. The capacity and delivery head&nbs...

DEFU is a professional diaphragm pump supplier in China. An Air Operated Double Diaphragm Pump is a Positive Displacement Pump. Diaphragm pumps are categorized under the most common types of industrial pumps. It makes use of the so-called positive displacement method in order to move a liquid from one location to another. A diaphragm pump is capable of handling highly-viscous liquids and other materials such as abrasives, chemicals, concrete, effluents. What’s more, Double diaphragm pump is driven by air, it’s pneumatic motor. they could be used in potentially explosive areas. So it’s can transfer gasoline or diesel fuel. we also call it as oil pump and drum pump. Below are our air driven diaphragm oil pumps with different specification. Pump body material is Aluminum, Diaphragm is Teflon.                                                   &...

Diaphragm Self Priming Pump are a common site in many industries. The stainless steel diaphragm pumps an excellent choice for food industry and high chemical resistance liquids. There are stainless steel 304&316. We adopt precision casting, the surface is smooth and higher strength.   Stainless steel 304 /316 diaphragm pump size from 1/2" to 3", the Max. Flow rate is 1060L/min. Pump can supply with aluminum center block or PP center block. Dry running ability: Pumps can be‘Run Dry’ without damaging the internals of the pump. Self-priming: AODD Pumps are self-priming–Dry suction lifts of 4m and wet suction lifts of 8m are common. Four bolts connection design, good seal and good dry suction. The bolts material are SS304。   Also we have Quickly Coupling for optional.     Any needs, pls feel free to contact with Cindy(sales9@defupump.com). We gladly provide technical assistance to you. 

The DEFU AODD diaphragm pumps are an excellent choice for applications found in a variety of industries, such as food, chemical, and general industry. Their unique design allows them to transfer highly abrasive or viscous products, semi-solid, and shear sensitive materials. They're best known for ease of maintenance and replacement, self-priming ability, seal-less design, and their ability to "run dry" without causing damage to the pump.   What else makes the air diaphragm pump so versatile? They're manufactured in a variety of pump materials, including cast iron, stainless steel(304&316), Aluminum alloys, and various diaphragm and valve making them ideal for just about any market. Membrane Pump Best Applications Below is a short list of the best applications for this pump: 1.Chemical or hazardous liquid transfer 2.Abrasive or viscous product transfer 3.Portable spill clean-up applications 4.Explosion-proof environments if properly grounded Below is our diaphragm pum...

The pneumatic double diaphragm pump is a versatile workhorse that enables users across a hugely diverse range of industries to standardise on a single pump type that for handling a wide variety of fluids. So long as there is a compressed air supply available the pump can be installed wherever it is required and should circumstances change it can be moved round a plant and switched to other operations with ease. Whether to fluid being handled requires a gentle pumping action, is chemically or physically aggressive the positive displacement AODD pump offers an efficient and low maintenance solution. The air membrane pumps are a common site in many industries. There is an extensive number of construction materials available to produce a bewildering number of configurations to accommodate difficult fluids such as  1.Corrosive chemical 2.Volatile solvents  3.Viscous, sticky fluids 4.Shear-sensitive foodstuffs and Pharmaceutical product 5.Dirty water and abrasive slu...