Air operated double diaphragm pumps are used in facilities of all sizes, and in a variety of different industries. From petrochemical to food and beverage, these pumps are popular and versatile. Their unique design is ideal for transferring highly abrasive or viscous products. But how to choose the pump material? The pumps are available in 6 different materials(Plastic, Aluminum,Stainless steel304&316, PVDF, Cast iron, Teflon) for the pump body and 5 different materials (Teflon,Santoprene, Hytrel, Viton, Buna-N) for the diaphragms. This makes it possible to select the best solution for your application.   When it comes to pumping chemicals, pump materials matter. 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 we...

Motor-driven diaphragm pumps are often used for metering, dosing or dispensing applications but AODD pumps tend to be general workhorse devices, typically used in transfer applications. Air operated diaphragm pumps are ideal for transferring a huge range of liquids including diesel, fuel, water as well as dirty and used oils. Great for many applications including tapping into air lines around work shops to move motor oils and hydraulic oils. The twin diaphragm design allows for periods of pump dead heading as well as transfer of fluids with particulate matter up to a few mm in size. They are relatively low cost and reliable; they can be run dry and can pump dirty/contaminated liquids. The following lists some typical applications of air diaphragm pumps: Mining  (Can operate in classified/hazardous areas)  -Dewatering above and below ground sites and quarries -Transferring abrasive slurries and sludge mixtures -Dosing reagents -Transferring solvents for separating mineral...

The double diaphragm pump is a versatile workhorse that enables users across a hugely diverse range of industries to standardies 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 be handled requires a gentle pumping action, is chemically or physically aggressive the positive displacement AODD pump offers an efficient and low maintenance solution.   This article will show how to install Pneumatic Diaphragm Pump.   Tightening Threaded Fasteners Before First Use Before using the pump for the first time, check and retorque all external fasteners. After the first day of operation, retorque the fasteners. Although pump use varies, a general guide-line is to retorque fasteners every two months.   Installation/Mountings l These pumps c...

Air-operated double diaphragm pumps(AODD) are used to transfer liquid in mining, coating,Chemical, oil, water/waste water treatment and some other industrial. They are relatively low cost and reliable. And they can be run dry.   This article will cover how to operate diaphragm pump correct.   1. Installation and Start-up Locate the pump as close to the product being pumped as possible. Keep the suction line length and number of fitting to a minimum. Don’t reduce the suction line diameter. For installations of rigid piping, short sections of flexible hose should be installed between the pump and piping. The flexible hose reduces vibration and strain to thee pumping system.   2. Air Supply Air supply pressure cannot exceed 125psi(8.6bar). Connect the pump air inlet to an air supply of sufficient capacity and pressure required for desired performance. When the air supply line is solid piping, use a short length of flexible hose between the pump and the ...

DEFU is a professional factory of Pneumatic diaphragm pumps in China. if you are in the market for a reliable and efficient pumping solution, look no further than plastic diaphragm pumps. These pumps are designed to handle a wide variety of fluids including corrosive, abrasive or viscous liquids. In this blog, we take a closer look at the advantages of plastic diaphragm pumps, and their applications in various industries.   Advantages of Plastic Diaphragm Pumps One of the greatest advantages of plastic diaphragm pumps is their durability. They are made of high-quality materials that are resistant to chemicals, rust and abrasion. This means they can handle even the toughest operating conditions and continue to operate reliably for many years. Another advantage of plastic diaphragm pumps is their versatility. They can handle a wide variety of fluids with varying viscosities, temperatures and chemistries. Plastic diaphragm pumps can also be configured with different ma...

Many of the previous diaphragm pumps are made of metal, not only bulky, but also difficult to maintain, although the current aluminum alloy diaphragm pump is also made of metal, but light weight, high strength. The Aluminum Alloy Pneumatic Diaphragm Pump has some advantages , now to share some related knowledge with you.   Aluminum alloy diaphragm pump is a new type of conveying machinery, which is currently the most novel pump in China. Using compressed air as the power source, all kinds of corrosive liquids, liquids with particles, high viscosity, volatile, flammable, highly toxic liquids, can be sucked out.   The main feature of aluminum alloy diaphragm pump is that it does not need to be filled with water, not only can pump the flowing liquid, but also can transport some easy-to-flow media(liquid viscosity less then 10000cps), high suction lift, explosion-proof.            1. The flow is large, the passing performance is good, ...

DEFU company is a professional diaphragm pump manufacturer. Our double diaphragm pump adopts guided air valve, with features of stable operation, idling operation, explosion-proof safety, good corrosion resistance.  Our AOK Series AODD pump has  the same performance with the USA GRACO diaphragm pump. And there are multi-material and multi-specification available. Below are our Diaphragm pump Specification for your choosing. Pls feel free to contact with Ms Cindy(sales9@defupump.com) for more details.

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...