Detailed Photos
Product Parameters
| Dlema Bolted Plastic AODD Air-Operated Double Diaphragm Pump 38 mm (1-1/2") Pro-Flo |
| AIR INLET |
3/4" FNPT |
MAX FLOW RATE |
458 lpm (121 gpm) |
LOADING
WEIGHT |
PP 28KG (62 lb) |
| LIQUID INLET |
38 mm (1-1/2") |
MAX PRESSURE |
8.6 bar (125 psi) |
PVDF 32KG (70 lb) |
| LIQUID DISCHARGE |
38 mm (1-1/2") |
MAX DIAMETER SOLIDS |
6.4 mm (1/4") |
|
| CONNECTION TYPE |
DIN/ANSI
(Flanged) |
MAX SUCTION LIFT CAPABILITY |
5.6 m (18.4') Dry
9.0 m (29.5') Wet |
|
Product Description
Principles of AODD Pump Operation
Air-Operated Double-Diaphragm (AODD) pumps are classified as reciprocating, positive-displacement-style pumps. They operate by displacing fluid from one of its two liquid chambers upon each stroke completion. To operate, the diaphragm pumps require a given amount of pressure (measured in pounds per square inch) and air volume (measured in cubic feet per minute) to deliver the proper amount of fluid.
The simple genius of the AODD pump design means that there are only a few wetted parts that are dynamic: the two diaphragms, which are connected by a common shaft, the two inlet valve balls and the two outlet valve balls. The diaphragms act as a separation membrane between the compressed air supply and the liquid. Driving the diaphragms with compressed air instead of the shaft balances the load on the diaphragm, which removes mechanical stress from the operation and extends diaphragm life. This also allows the valve balls to open and close on the valve seats, which direct liquid flow. This simple design and operation makes it easy for the operator to find the correct pressures and flows to optimize its operation.
More specifically, the AODD pump begins operation when the air distribution system directs the air supply to the right air chamber and back side of the diaphragm. This moves the diaphragm away from the center block and toward the liquid chamber, in the process pulling the opposite diaphragm inward. This means the opposite diaphragm is now on its suction stroke. At the same time, atmospheric pressure forces fluid into the inlet manifold, forcing the inlet valve ball off its seat. This allows liquid to move past the inlet valve ball and into the liquid chamber.
When the pressurized right liquid chamber reaches its liquid capacity, the air valve redirects compressed air to the back side of the opposite diaphragm. This forces that diaphragm away from the center block while pulling the right diaphragm toward the center block. This closes the inlet valve ball on the opposite side while lifting the discharge valve ball off its seat and forcing the liquid to flow through the discharge manifold. The process is repeated for the opposite side, with the liquid chamber filling, the forced air redirecting the diaphragms and the created pressure forcing the discharge valve ball off its seat as the liquid moves through the discharge manifold.
As the AODD diaphragm pump reaches its original starting point, each diaphragm has gone through one suction and one discharge stroke, which constitutes one pumping cycle.
Woking Principle of DLEMA AODD Pumps
DLEMA AODD pumps are reciprocating, positive-displacement-style pumps driven by compressed air. The following drawings and information detail the liquid flow patter n through the pump from its initial unprimed position.
1. The air valve directs pressurized air to the back side of Diaphragm A.
2. The compressed air moves the diaphragm away from the center of the pump.
3. Diaphragm B is pulled in by the shaft connected to the pressurized Diaphragm A.
4. Diaphragm B is now on its suction stroke. The movement of Diaphragm B toward the center of the pump creates a vacuum within chamber B and causes the atmospheric pressure to force fluid into the inlet manifold forcing the inlet valve ball off its seat.
5. When the pressurized diaphragm, Diaphragm A, reaches the limit of its discharge stroke, the air valve redirects pressurized air to the back side of Diaphragm B.
6. The pressurized air forces diaphragm B away from the center while pulling Diaphragm A to the center.
7. Diaphragm B is now on its discharge stroke. Diaphragm B forces the inlet valve ball onto its seat due to the hydraulic forces.
8. The hydraulic forces lift the discharge valve ball off its seat, while the opposite discharge valve ball is forced onto its seat, forcing fluid to flow through the pump discharge.
9. At completion of the stroke, the air valve redirects air to the back side of diaphragm A, which starts diaphragm B on its exhaust stroke.
10. As the pump reaches its original starting point, each diaphragm has gone through one exhaust and one discharge stroke.
This constitutes one complete pumping cycle. The pump may take several cycles to completely prime depending on the conditions of the application.
Our Advantages
Benefits of AODD Pumps
Thanks to their unique operating principle, AODD pumps excel in a wide variety of applications and incorporate numerous features and benefits, including:
Since 2017, DLEMA has been the global leader in air-operated double-diaphragm (AODD) pump technology. As the developer of the AODD pump, DLEMA introduces a constant flow of new innovations that have catapulted the positive displacement pump into the future. From developing premier AODD pump technology to offering the world's largest selection of diaphragms, DLEMA's extensive knowledge base combined with unprecedented new technologies and unparalleled customer service provides end users with the peace of mind they need when selectin g a process-solution provider.
Serving the energy, process, hygienic, mining and water and wastewater markets, DLEMA's world-class distributor network ensures that you will have access to the latest pump technologies and fluid transfer services available when you need them.
The DLEMA series pump has the premier air distribution system. The innovative, yet simple, Pro-Flo SHIFT design features an air control spool that automatically optimizes air consumption and eliminates the overcharging of the air chamber with no reduction in flow rate. This results in a reduction of air consumption and operational costs while maintaining maximum operational efficiency and volumetric consistency.
•Fewer operating parts, meaning less downtime and simplified maintenances
•Delivers more yield per SCFM versus competitive AODD pumps
•Longer diaphragm life
•Quiet operation
Installation Instructions
DLEMA Bolted Metal & Plastic AODD Pumps
DLEMA bolted metal and plastics pumps are specifically engineered for maximum performance and operational excellence in a variety of applications. Their bolted configuration ensures total product containment while the optimized liquid path reduces internal friction to maximize output and efficiency.
SIZE AND MATERIAL OPTIONS:
• Sizes: 6 mm (1/4") through 76 mm (3")
• Wetted Path Materials:
• Metal: Aluminum, Ductile Iron,
Stainless Steel, Alloy C
• Plastic: Polypropylene, PVDF
DLEMA Series pumps set the standard for AODD pump performance, providing increased energy savings and higher flow rates when compared to many competitor pumps. Combining the best of both words - industry-leading ADS with a top-quality AODD pump - DLEMA Series pumps feature time- and field-proven performance, containment and maintenance advantages.
The secret to the success of the DLEMA Series is a first-class design that comes equipped with industry-leading air valves that offer up to 60% energy savings and 34% greater flow rates when compared to other AODD Pump technologies. Additionally, DLEMA Series pumps has been designed with increased suction lifts and fewer moving parts for increased reliability.
AODD Pumps Series Connection Type
DLEMA Clamped Metal & Plastic Pumps
For applications where constant changeovers between
products are required, DLEMA clamped metal and plastic
pumps provide ease of maintenance. The clamp bands
come off quickly and easily for replacement of diaphragms
and cleaning. The lower downtime translates directly
into your increased productivity and contributes to
your profitability.
SIZE AND MATERIAL OPTIONS:
• Sizes: 13 mm (1/2") through 102 mm (4")
• Wetted Path Materials:
• Metal: Aluminum, Cast Iron,
Ductile Iron, Stainless Steel
• Plastic: Polypropylene, PVDF
Plastic or Metal
Plastic and metal pumps each have unique benefits and characteristics suited for your specific application needs. For chemical processes, plastic pumps typically provide greater resistance than metal. Hygienic processes on the other hand tend to require stainless steel. Additionally, general industrial applications benefit from aluminum and ductile iron's durable properties. DLEMA has multiple material options to provide the exact pump needed for your application.
Clamped or Bolted
The original AODD pump design, clamped pumps, lend themselves to various process and waste applications, as well as construction and mining. The clamped configuration provides easier maintenance without sacrificing reliability. Bolted pumps deliver maximum process fluid containment over clamp-banded designs, and can be used for a wide range of applications, including oil and gas, paints and inks, and acids. Bolted pumps also offer a redesigned liquid path that reduces internal friction to maximize output and efficiency.
Integral Piston Diaphragms (IPDs)
DLEMA IPDs offer safe, clean and reliable product transfer with no product entrapment areas to minimize product contamination and risk liabilities. These diaphragms have a smooth, contoured shape and no outer piston. IPDs have greater durability and flex life and are compatible with existing shafts and supporting hardware. They also provide greater flow rates and faster installation
CHEM-FUSE INTEGRAL PISTON DIAPHRAGM
Chem-Fuse diaphragms are the ideal solution for general industrial and chemical applications. Incorporating the core patented technology of DLEMA's integral piston design, Chem-Fuse diaphragms solve many of the critical issues faced by industrial companies that use conventional diaphragms without sacrificing performance. This diaphragm features a wide range of temperature limits, excellent flex life, high abrasion resistance and outstanding durability, even when handling acids, caustics and other aggressive fluids. Additional benefits include:
• Up to 100% increased flow and suction lift compared to PTFE laminate diaphragms
• Elimination of potential leak point increases containment and safety when pumping critical or dangerous fluids
• Available in Wil-Flex™ and non-food grade Saniflex™ material
• Available sizes: 25 mm (1"), 38 mm (1-1/2"), 51 mm (2"),76 mm (3"), 102 mm (4")
In addition, DLEMA also offers a variety of other diaphragm options, including:
EZ-INSTALL
• Convolute shape allows quick, easy installation and minimizes risk of injury
• Decreased downtime and costs of diaphragm replacement
• Available in: Thermoplastic Elastomers (TPE) Wil-Flex, Saniflex™, Polyurethane and Geolast®
• 100% compatible with existing hardware
PTFE ELASTOMERS
• Optimal choice for aggressive chemical applications
• Excellent flex life, good abrasion resistance and durability
• Available in Reduced-Stroke PTFE and Full-Stroke PTFE
RUBBER ELASTOMERS
• General purpose diaphragm
• Provides the greatest temperature spans
• Increased chemical resistance
• Available in Buna-N, EPDM, Neoprene, and FKM
ULTRA-FLEX™
• Utilizes longest-lasting rubber-compound diaphragm in the industry
• Reduces internal stress for long diaphragm life
• Increased abrasion resistance with corrosive materials.
Accessories
DLEMA's accessory products add value to your liquid process and expand the application range of DLEMA pumps by augmenting the performance and/or utility of the pump.
• Equalizer® Surge Dampeners - engineered to reduce fluid pressure and flow fluctuations that are inherent in AODD pumps, providing a smoother discharge flow. This function is critical in applications that need to minimize vibration and control pipe hammer which protects the piping system as well as downstream instrumentation
• Wil-Gard™ - detects and notifies plant personnel when a diaphragm has ruptured to prevent further damage to pump
• Pump Cycle Monitor (PCMI) - counts pump cycles by sensing the presence of the air valve spool
• Drum Pump Kit - enables DLEMA 6 mm (1/4") and 13 mm (1/2") pumps to adapt directly to drums for cost-effective, efficient liquid transfer
Market
General Industrial
DLEMA Pro-Flo® SHIFT Series and Specialty Series Pumps are ready to optimize your production processes with proven, best-in-class technology that includes state-of-the-art air distribution systems (ADS) and a variety of industry-leading diaphragm options.
Oil & Gas
No matter the activity, the DLEMA line of Specialty Series Pumps has the solution you need improve energy efficiency, downtime and flow rates for all your your critical oil and gas applications.
Paints & Coatings
In order to even further help AODD pumps overcome the challenges in handling paint and coatings, DLEMA offers the Pro-Flo® SHIFT Series pumps in a variety of innovative diaphragm options specially designed to eliminate leaks and downtime, and do it in the most energy-efficient, environmentally sensitive and bottom-line friendly way possible.
Chemical Process
DLEMA AODD pumps set the industry standard for chemical-processing applications thanks to their ability to provide the highest level of product containment while offering state-of-the-art technological advancements in air distribution systems (ADS) and diaphragm technologies.
Water and Wastewater
DLEMA Pro-Flo® SHIFT Series and Specialty Series Pumps excel in the water and wastewater industry thanks to an array of operational benefits designed to optimize the process, decrease maintenance and provide superior transfer of fluids that may contain particulates or abrasive compounds.
Mining
The DLEMA line of Specialty Series Pumps are the ideal solutions for a wide variety of mining applications because they possess the design and materials of construction needed to handle the harsh conditions.
Food and Beverage
AODD diaphragm pumps excel in food and beverage applications they have been designed to conform with sanitary standards (3A, EHEDG and FDA Guidelines, etc.) while providing gentle product handling, superior containment and easy maintenance.
Ceramics
AODD pumps from DLEMA are available with a variety of design enhancements and with numerous diaphragm options that allow them to safely and efficiently handle abrasive and corrosive materials while eliminating leak points and downtime.
Pharmaceuticals and Cosmetics
DLEMA further enhances the cleanability and product safety of AODD pumps by offering a line of Specialty Series Pumps that not only meet or exceed strict hygienic requirements, but utilize a one-of-a-kind design that optimizes performance and energy efficiency.
Packaging
DLEMA air-operated double-diaphragm (AODD) pumps are portable, self-priming, dry-run capable, feature no mechanical seals, and can easily handle adhesive, viscous fluid.
Adhesive and Sealants
Realizing the deleterious effects that adhesive buildup can have on the operation and reliability of traditional two-piece air-operated double-diaphragm (AODD) pump designs, DLEMA® offers its Chem-Fuse Diaphragm.
){kind=link}