Jun 5, 2025
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Double diaphragm pumps for greater reliability in chemical processes
Product Manager Stefan Anstöter knows the requirements of the chemical industry and knows what users value. "From the material to the design and the accessibility for repairs: Chemical pumps must function flawlessly in practical application," says Stefan Anstöter, Product Manager at Timmer GmbH. "We know: Here there is no room for error. That's why we have optimised our pumps so that they meet – and even exceed – all industry requirements. This starts with deliberate use of suitable pump materials. For example, stainless steel, which has proven to be effective in other industries, is often not suitable for chemical applications because it is subject to attack by alkalis and acids. Instead, the pumps in the ‘Tim Chem’ product line are equipped with a plastic housing. The polytetrafluoroethylene (PTFE) that we use is compatible with the chemicals that are used.” External influences such as significant temperature fluctuations change the shape of the material, and the housing then tends to leak at the connections. “We use a design for our pumps that connects the highly-resistant plastic components that are in contact with media, by means of tie rods. The force exerted by the tie rods is distributed by the large-area reinforcement plates – a measure that significantly minimises deformation of the plastic,” says Anstöter.
The Tim Chem series chemical pumps come factory-standard with a sensor that monitors the status of the pump and that can be integrated directly into the user's process control system. To ensure maximum protection, stainless steel sheets encompass the pump and provide stability for the entire construction. Metal does not come into contact with the medium. Plastic, and plastic only, which has been tested for resistance, completely encloses the processed medium. The material is FDA-compliant and thus it is food-safe. Optimal sealing of a pump is a major aspect of process reliability. It is a characteristic that plays a central role in product development at Timmer. In this regard, the design follows a simple rule: The fewer sealing surfaces, the fewer possibilities of a leak. Consequently, chemical pumps from Timmer have only four sealing points – and these pumps are Atex-compliant. Easy access for repairs
A look inside the pump shows the sealing concept, which significantly minimises the risk of leaks. The design enables easy access for repairs and fast on-site service. These double diaphragm pumps come factory-standard with an intelligent sensor for condition monitoring. The sensor can be integrated directly into the user's process control system. Integrated in a process control system the sensor shows the real-time status of the pump and by means of an additional system, immediately sounds an alarm should an error occur. The company decides how the pump should be integrated into the system and what data it should display. If an error message occurs and if repairs are required, service technicians benefit from the easy accessibility offered by the pumps. For example, valve balls and valve cages can be replaced without dismounting the side covers. Use of special tools is not necessary. The heart of the pump, a special, extremely low-wear, ceramic latching valve, ensures smooth operation. All of the valve's friction pairs are made of ceramics in conjunction with precision-ground, high-performance plastics. The result is minimum wear in the valve itself. The reduced stroke path provides long-term protection of the diaphragm. www.timmer.de Read the full article
Condition monitoring system for process and diaphragm metering pumps
The Lewa ‘Smart Monitoring’ is a monitoring system consisting of sensors, a programmable logic controller (PLC), an industrial PC (IPC) and data analysis for new and existing pumps. The system determines characteristic values and key performance indicators. It is suitable for the Lewa ecoflow process and triplex diaphragm metering pump series. The focus of the system are critical and permanent applications from chemical, pharma or beverage industries. For more information: www.lewa.com/en/services/digital-services/lewa-smart-monitoring Read the full article
Author: Harshada DiveA diaphragm pump, also called a positive displacement pump, makes use of reciprocating motion to move fluids. A diaphragm pump is made of rubber or polymeric material and has safety valves that regulate the flow of fluid in and out. The water industry has experienced a significant surge in demand for pumps as a result of heightened government concerns, which in turn has fueled the growth of the diaphragm pump market.Integration of machine learning and 3D printing in pump manufacturing and use of advanced technologies have enabled the development of sophisticated designs and features for pump replacement and repair.According to a recent study by Allied Market Research, the Global Diaphragm Pump Market is anticipated to display a noteworthy CAGR from 2021 to 2030.The water and wastewater sector dominates the market Increase in global population and rapid urbanization have increased the demand for water supplies, which is driving the need for wastewater management and is expected to expand the market for diaphragm pumps. Another factor boosting the development of this market is the widening oil and gas industry, which makes extensive use of diaphragm pumps. Countries such as China and India are in a growing phase as they are investing in the refining and petrochemical industries; thus, it is expected to open up new opportunities for the diaphragm pump market.Furthermore, keeping in tab with the United Nations University Institute of Environment, Water, and Health, in 2020, developed nations effectively treated 74% of the industrial and municipal wastewater they generated, whereas upper-middle income countries treated only 43% and lower-middle income nations treated merely 26%.The demand for water treatment facilities and the use of diaphragm pumps in water treatment facilities are anticipated to rise in developing countries due to increasing environmental awareness and water shortage on board. For example, The Kerala Water Authority started building a water treatment facility with a 142 million liters per day (MLD) treatment capacity in Aluva in January 2022. The estimated cost of the plants is INR 180 crore, with a projected completion date of 2024. Thus, these upcoming water treatment projects are increasing the demand for diaphragm pumps.In keeping with the surging demand for diaphragm pumps, the leading companies in the market are innovating new technologies and releasing new products, strategies and collaborative partnerships. For instance, Graco Inc. released a new version of its (Electric double diaphragm pump) Husky 3300e pump in August 2021. The (Electric double diaphragm pump) Husky 3300e pump is used to relocate industrial fluids, and it also provides plant managers with high-volume fluid transfer (up to 220 gpm) and significantly lower power consumption.The new Quaternary Diaphragm Pump( Quattroflow™ QF2500) was launched in April 2020, according to Quattroflow a division of PSG. The new QF2500 pump is suitable for chromatography, depth filtration, sterile filtration, virus filtration, and TFF among other demanding biopharma applications. It has a 2,500 lph (660 gph) maximum flow rate.The top manufacturer of specialty pumps, Almatec, a part of Dover Corporation, unveiled two new models of its solid plastic pumps, namely, the C-40 and C-50 models, as part of its series of air-operated double diaphragm pumps in August 2019. One of the standouts features of these pumps is their enhanced bolt torque, which provides an exceptional air control system and ensures safe operation. This leads to increased productivity while maintaining lower operating costs.A new diaphragm pump from KNF with low pulsation was introduced in March 2019. The (FP 400) diaphragm pump is made for recirculation uses across a range of industries. The pump also combines gear pump-like levels of pulsation with the benefits of (FP 400) diaphragm pump technology.Other wellknown diaphragm pump manufacturers are for example: - Abel - Debem - Flotronic - Ingersoll Rand Aro - Lewa - Prominent - Tapflo - Timmer - WildenCovid-19 Impact on Diaphragm Pump Market The diaphragm pump market growth was negatively impacted by the Covid-19 pandemic due to a decrease in demand in the industrial sector. Lockdown measures implemented by governments disrupted transportation systems, further adding to the market slowdown. However, the market has witnessed growth due to an increase in onshore and offshore fields, recovery in oil prices, and rising demand for oil and gas. Additionally, exploration and production activities are shifting toward deeper offshore regions, resulting in increased demand for diaphragm pumps, particularly in the offshore ultra-deepwater projects.www.alliedmarketresearch.com
The ore is processed there using the high pressure acid leaching (HPAL) process. In this process, nickel laterite reacts with sulfuric acid in the autoclave. Nickel in the form of sulfate is leached out at a high temperature and high pressure, while iron in the form of hematite enters the leached residue. Washing and thickening precipitate the leach solution with hydrogen sulfide, magnesium or sodium hydroxide to produce an intermediate nickel-cobalt sulfide or nickel-cobalt hydroxides. By leaching, extraction and electrolytic recovery, this product can be used to produce stainless steels such as Hastelloy.As part of this process, 30 m3 of 98-percent sulfuric acid per hour must be meterd into a high-pressure reaction vessel at a pressure of 70 bar. G3G triplex process diaphragm pump(Lewa Nikkiso (Dalian) Fluid Technology Co., Ltd.)Due to their robustness, durability and hermetic tightness, the decision was made in favor of G3G triplex process diaphragm pumps with the M500 pump head from Lewa. Durability is achieved in particular by the drive element housing, which is a one-piece design with a vertically flanged engine, and by the double-bearing crank shaft. In addition, the mono-block design ensures that the required components such as bearings and gaskets could be reduced to an absolute minimum, resulting in an extremely compact, space-saving design. The flow rate can be controlled using a frequency inverter that regulates the change of the engine RPM, the number of strokes per minute and thus the flow rate. Because all components are designed for continuous stress, trouble-free operation for more than 40,000 h is possible with the drive unit.The M500 pump head with hydraulically actuated sandwich diaphragm made of pure PTFE is designed for discharge pressures up to 350 bar or flow rates up to 19 m³/h, and is protected against operating errors and impermissible operating states. For example, an integrated, individually adjustable pressure relief valve in the hydraulic part prevents possible overload situations during operation. In addition, the patented DPS protection system and the diaphragm monitoring system report any damage to the diaphragm in good time before it ruptures and the metered liquid can escape into the environment.www.lewa.com/en/pumps/process-pumps/lewa-triplex-process-pump
New electrically operated Double Diaphragm Pumps
Tapflo is introducing a completely new series of diaphragm pumps, this time electrically operated. “Regardless of whether the pump application is hygienic or industrial, the trend is the same – electrically operated pumps will eventually replace mechanical pumps (if applicable),” so a Tapflo press release. “Due to changes in thinking of our impact on the environment, we are proud to present the EODD – Electrically Operated Double Diaphragm Pumps. Our newly launched product follows a forward approach but is still based on the original diaphragm pump technology, which proves to be very successful. We have consulted our clients, who show a demand to get the functions and benefits of a traditional diaphragm pump but with the added advantage of lower operating costs.” – says Katarzyna Szałkowska from Tapflo Group Marketing Team. “Because of its low energy cost and clean and easy maintenance, the EODD pump does not place a heavy burden on the environment.”
The pump is powered by a highly efficient electrical drive (IE3 class) and there is no chance of hydraulic fluid leakage because the pump simply does not need one. The new EODD pump has an almost identical design of the wetted side as standard Tapflo air operated diaphragm pump, therefore, it inherits most of its advantages and most of the spare parts are the same. ‘’After several months of designing, testing and inspecting the products, it has all paid off and we are finally ready to launch them! With great joy and pride, we present to you our new family member, thus expanding our product portfolio.” – explains Jakub Zduńczyk Product Engineer at Tapflo. EODD pumps can distribute liquids with temperatures of up to 110 °C and flow rates up to 220 l/min. All Tapflo pumps are made from high-quality materials and are suitable for dealing with chemicals, surface conditioning, pulp and paper industries, water treatment and a wide range of hygienic applications. EODD’s are perfect for applications that require low pulsation or as an energy-saving alternative to air operated diaphragm pumps. Read the full article