Posts Tagged ‘double-diaphragm’

AODD for hygienic processes and sanitary applications

Monday, June 25th, 2018 von admin

Flotronic’s ‘E’ Series pumps are air operated double diaphragm pumps (AODD). These pumps have proved themselves unmatched when tested to exacting performance standards by EHEDG (the European Hygienic Engineering & Design Group). The ‘E’ Series offers peace of mind for the food, beverage, dairy and pharmaceutical industries – and any environment or process where avoidance of product contamination is paramount.

The 10” version with 2” connections offers a pump solution ideal for customers with low to mid-range flow rate applications while customers seeking flow rates as high as 500 litres per minute will find the 12” pump with 1½” – 3” ideal.

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New 3-Inch AODD pump

Tuesday, June 12th, 2018 von admin

At Achema 2018 Aro introduced the new EXP Series three-inch non-metallic, air-operated diaphragm pump for chemical and water processing applications.

These pumps can transfer up to 20,000 liters of fluid in 30 minutes. That equates to a 47 percent increase in flow compared to the Aro two-inch pump, and a flow rate of up to 270 gallons per minute.

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What To Consider When Selecting a Filter-Press Pump

Friday, February 2nd, 2018 von admin

Fig. 1 A typical chamber filter press being fed by a Almatec high-pressure air-operated double-diaphragm (AODD) pump

Technical paper by Peter Schüten:

High-Pressure Air-Operated Double-Diaphragm (AODD) Pumps Deliver The Operational Advantages Necessary For Optimized Operation Of Chamber Filter Presses.

In many industrial processes that feature the handling of liquids, the substances that are being transferred may occur in an aqueous or “muddy” state, with the liquid portion needing to be removed. This liquid-removal stage may take place during the production process – for example, in the filtration of edible oils or yeast solutions – but it more frequently occurs at the end of a process like wastewater treatment when the waste sludge that has formed must be withdrawn. Since the disposal of such sludges is calculated based on weight and volume, their thickening and drying is particularly lucrative for the processor. During the thickening and drying process, the sludges are treated using chemicals and/or physical processes so that the waste sludge forms into flake-like solids. After adjusting the pH level to neutral or alkaline via the use of milk of lime, the subsequent dewatering process separates the water for disposal, with the remaining volume of sludge significantly reduced.

The simplest technology for this process involves collection and thickening of the sludge through the use of gravity. However, it is significantly more effective to use technical drying methods via processes such as centrifuges and evaporators, or more commonly, chamber filter presses (Fig. 1).

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Wilden: New E-Commerce Store

Thursday, July 20th, 2017 von admin

Wilden, focused on air-operated double-diaphragm (AODD) pump technology, announced the launch of its new e-commerce store.

The Wilden Store provides end users with an online shopping environment. Not only can end users easily find appropriate and authentic spare parts and accessories for their Wilden pumps, but they can also find comparable Wilden pumps based on competitor part numbers.

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Wilden: New Diaphragms for Industrial Applications

Monday, May 22nd, 2017 von admin

The new Chem-Fuse diaphragms are specifically designed for industrial applications. The Chem-Fuse diaphragm technology eliminates the potential leak point at the outer piston as well as outer piston abrasion. This is crucial for industrial applications that pump abrasive or dangerous fluids. The diaphragm design also offers easy cleanability for faster changeovers between products. These features allow Chem-Fuse diaphragms to enhance productivity, reliability and safety.

An additional benefit of Chem-Fuse diaphragms compared to other reduced-stroke integral piston diaphragms is the use of a large integral piston and full-stroke shaft that provides greater efficiency. This design allows Chem-Fuse diaphragms to provide up to 100 % increased flow and suction lift compared to other diaphragms.

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Flotronic: The One-Nut Design for hygienic AODD

Tuesday, March 28th, 2017 von admin

UK specialist pump manufacturer Flotronic Pumps Limited was founded by Lew Norris in 1981. The engineering design consultancy ‘Norris Brothers’ had been involved in the design of  specialist pumps since 1952.  Lew Norris’ new company pioneered the air-operated, double-diaphragm ‘One-Nut’ pump. Flotronic’s ‘One-Nut’ design allows quick pump disassembly for inspection, cleaning and maintenance – delivering a massive benefit for pump users in terms of reduced down-time, particularly as the pump can be inspected or maintained in line without disconnection of pipework. Flotronic remains the only British-owned specialist manufacturer of air-operated, double-diaphragm pumps in the UK.

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Wilden: Pure-Fuse diaphragms for hygienic applications

Tuesday, March 1st, 2016 von admin

Wilden_Pure-Fuse-DiaphragmPure-Fuse diaphragm technology incorporates a one-piece design that eliminates product-trap areas between the outer piston and diaphragm that can harbor bacteria, a critical consideration for hygienic applications. This patented design also provides an unbroken fluid-contact surface for CIP capability and reduced contamination risks. Pure-Fuse combines food-grade plastics and elastomers with a stainless-steel core using no adhesives or nylon fabric that can contaminate process fluids in the event of a breech. In addition, by eliminating the outer piston Pure-Fuse diaphragms experience reduced abrasion, which results in longer diaphragm life.

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Almatec: AODD Pumps receive 1935/2004/EC certification

Monday, February 22nd, 2016 von admin

Almatec, manufacturer of sanitary air-operated double-diaphragm (AODD) pumps, is pleased to announce that its plastic and metal AODD pumps are now 1935/2004/EC-compliant.

1935/2004/EC is the common name for European Commission Regulation No. 1935/2004, which is the European safety standard for materials that come into contact with food during the production process. With this certification, Almatec AODD pumps are now available for use in a wide variety of sanitary and hygienic applications that involve food contact.

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Wilden celebrates 60 years

Tuesday, November 3rd, 2015 von admin

Wilden was founded in 1955 by Jim Wilden when he revolutionized the pumping industry by inventing the air-operated double-diaphragm (AODD) pump technology. Since that time, Wilden is providing innovative solutions for a wide range of applications in the energy, chemical, process and water & wastewater industries. Wilden became part of PSG in 2008, and now spans more than 160 countries with more than 180 distributors worldwide.

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Wilden: High pressure AODD with energy-efficient air distribution system

Monday, October 26th, 2015 von admin

Wilden_SHIFT-High-Pressure_familyThe two new 1-1/2-inch (38 mm) high pressure bolted metal AODD pump models feature redesigned liquid paths to reduce internal friction to maximize output and efficiency. They are shear sensitive, dry-run capable, externally serviceable, completely submersible and comply with all CE and Atex requirements. These pumps also come equipped with the Pro-Flo Shift air distribution system.

The two new high pressure pump models are

  • the HS400S, which is available in aluminum, and
  • the HS430S, which comes in stainless steel.

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