electric diaphragm mud pump free sample

15 Models below. Made in USA. Gas, Diesel or Electric diaphragm pump, or mud / sludge pump. Easily maneuverable, the gas diaphragm pump is built for performance; Ideal for seepage dewatering, high suction lift, cleaning septic tanks, pumping industrial waste and marine tanks, small wellpoint systems and dewatering in sandy, muddy waters. Honda or Briggs gasoline engine or Electric diaphragm pump with motor.

Diaphragm Mud pump Suction & discharge port size cannot be reduced. Cast aluminum construction with thermoplastic rubber diaphragm. Also called a mudhog. 90 degree rotatable base on all models to fit through narrow gates. As a alternate in a centrifugal pump dredge pump design see 316F-95 2" mud pumps. Trash pumps, centrifugal Dredge Pump. Hoses and accessories.

New model 338E-96 Powered by 1.5HP electric motor. AMT 2" Diaphragm pumps features 2-stage, 44 to 1 gear reduction with a large diameter output gear and heavy duty ball bearing construction. ALSO AVAILABLE IN 1-PHASE,115/230V Often referred to as Mud pumps, mudhog or Sludge pumps, diaphragm pumps, mud sucker and oil collection are designed to pump mud, slurry, sewage, and thick water liquids that have the ability to flow. Often used at marina"s instead of a macerator. For portable toilet and sewer contractors on a honey wagon.

AMT Diaphragm pumps are available with a choice of drivers to meet your application requirements. Built-in molded polyurethane flapper/check valve assures self-priming to 20 feet after initial prime. Heavy duty gear box is designed to operate pumps at 60 strokes per minute. Each unit includes a 2" NPT steel suction strainer, two 2" NPT nipples, and wheel kit with 10" semi-pneumatic transport wheels for portability. Pumps are designed for use with non-flammable liquids which are compatible with pump component materials. Mud Trash pumps Suction and discharge port size Cannot be reduced. Other 2" trash pumps

Suction and discharge port size cannot be reduced. Due to positive pumping action of diaphragm pumps, by all mfr"s, the discharge is recommended to only be 25FT long unless oversized. Discharge can not be restricted. There is no relief valve. Phelps HoneyWagon Wastecorp

Being a leading supplier of Diaphragm pumps, we partner with top-rated brands to bring you the quality and performance driven pumps that the fluid handling professionals demand. Following are the models we offer under this category:

Lutz Jesco Memdos Pumps: Sturdily built using quality materials such as Polypropylene, PVC, PVDF and 316 Stainless Steel, Viton, Hypalon or PTFE, the pumps manufactured by Lutz Jesco assure unfailing performance for years. With impeccable knowledge in the field of metering technology and disinfection, Lutz Jesco brings the customers with the innovative range of metering pumps adhering to the highest international standards.

PULSAtron Metering Pumps: These pumps are designed to handle difficult, abrasive, corrosive and gaseous fluids. Our PULSAtron series continue to set a standard in the market for indoor or outdoor residential and commercial applications. All PULSAtrons we offer at Cannon Water Technology are ETL, ETL Sanitation, CE and NSF 61 certified.

SEKO has proven and innovative solutions when it comes to dosing, injection and transfer of liquids. Our range of SEKO metering pumps are compatible with various chemicals and are suitable for applications that demand high precision.

Walchem Metering Pumps: Walchem’s most innovative and comprehensive metering pumps are manufactured to the highest quality standards, and covered with a 2-year warranty. The company delivers solutions tailored to meet the needs of hazardous areas.

All the diaphragm brands aforementioned can run dry indefinitely. Our range of self-priming diaphragm pumps has no moving parts, leading to minimized downtime and maintenance. The other common features of the diaphragm brands we offer at Cannon Water Technology include;

These versatile pumps are put to operation in process applications where high pressures are required. With simple operating principle and compact and reliable design, ourdiaphragm brands are used for the following applications in chemical, mining, construction, cement, food, pharma and marine industry for:

Rightly invest in the range of pumps that assure high technical performance and efficiency. Talk to the experts at Cannon Water Technology to gain more insights on the technicality of the models we offer. Explore the category and make a wise selection for critical fluid handling applications.

Honda"s WDP30 diaphragm pump is a positive displacement pumps that can pump thick sludge or water containing large solids. Instead of an impeller and a volute, diaphragm pumps use a neoprene diaphragm. The WDP30 offers an exceptional value for construction, industrial, and agricultural applications.

High performance mounts minimize vibration, keeping the pump from walking away or burying itself in soft soil conditions. The reduced vibration also reduces wear on components, increasing the pump"s durability.

Diaphragm Pump Market size was valued at USD 5.66 Billion in 2020 and is projected to reach USD 9.13 Billion by 2028, growing at a CAGR of 6.14% from 2021 to 2028.

The rise in investments in water treatment facilities and oil and gas industry is expected to be the key factors driving the global market over the estimated period. Increasing demand for fresh water as a result of growing population along with rapid industrialization and urbanization has amplified the market growth in emerging regions. The Global Diaphragm Pump Market report provides a holistic evaluation of the market. The report offers a comprehensive analysis of key segments, trends, drivers, restraints, competitive landscape, and factors that are playing a substantial role in the market.

Diaphragm pumps are positive displacement pumps that are used to pump fluids with the help of reciprocating motion of the diaphragm. Diaphragm pumps mainly consist of a reciprocating diaphragm made up of rubber or other polymeric materials and check valves which control the incoming and outgoing fluid. Moreover, the selection of a suitable diaphragm material according to the application is the most important factor for longer life of diaphragm pumps. For better service life of diaphragm pumps structured diaphragms are used in many applications.

Sometimes, for higher capacity, double diaphragm pumps are used in place of single diaphragm pumps. The energy required for the reciprocating motion of the diaphragm can be derived from a mechanical drive or a hydraulic drive. Furthermore, the output fluid volume can be controlled in two ways, either by changing the length of the diaphragm stroke or by varying the speed of the diaphragm stroke. Diaphragm pumps are employed for high to medium flow rates at high pressures.

Because of their ability to handle different types of fluids, diaphragm pumps are used in various industries like construction industry and chemical industry. Diaphragm pumps are reciprocating positive displacement pumps used to transfer liquids. They are manufactured using different methods depending on the mechanism and operational requirements of end-use applications. These devices typically include a diaphragm and chamber, as well as suction and discharge check valves, to prevent backflow.

Water treatment helps remove toxic elements from the water with the help of chemical and physical separation processes. Diaphragm pumps can handle highly viscous fluids, liquids with solid particles, hazardous materials or liquids that are mainly used in the water treatment industry. Thus, they are used in applications including bulk transfer, refining, circulation drilling mud transfer, waste processing, refueling, loading and unloading, and wellhead injection.

Technological advancements have led to the development of many compact diaphragm pumps which are relatively simpler in design. This has resulted in an increase in the adoption of diaphragm pumps in many industries, thus resulting in the steady growth of the Diaphragm Pump Market during the forecast period. Moreover, characteristics of diaphragm pumps like variable flow control, relatively lower maintenance cost and relatively lower downtime tend to render diaphragm pumps ideal for a gamut of applications. In many offshore drilling applications diaphragm pumps are well suited to transport toxic and corrosive fluids without leakage, this tends to promote the growth of the Diaphragm Pump Market during the forecast period.

The introduction of air-operated double diaphragm pumps for the transport of liquids containing large solids without the utilization of electricity is expected to drive the growth of Diaphragm Pump Market. Furthermore, the manufacturing of pumps has witnessed a combination of 3D printing technology with computer modeling, which has led to cutting edge development in pump design, repair, and replacement, which, in turn, drives the global market for diaphragm pumps and provides an opportunity for market growth in the coming future. Moreover, due to the growing demand for oil and gas, recovery in oil price, and the increasing number of onshore and offshore fields reaching their maturity, exploration and production activities are expected to make a shift toward deeper offshore regions, resulting in increasing offshore ultra-deepwater projects. This, in turn, is expected to drive the Diaphragm Pump Market during the forecast period.

However, technological advancements in the alternative options of conventional pumps, such as solar pumps, are expected to hinder the market during the forecast period. Air-operated double diaphragm pumps sometimes tend to result in the problem of water hammering, this tends to limits the use of diaphragm pumps, thus acting as an impediment to the growth of the Diaphragm Pump Market. Furthermore, the problem of pulsation is also associated with diaphragm pumps, causing vibration in diaphragm pumps, thus limiting their application in certain areas.

Based on the Mechanism, The market is bifurcated into Air Operated and Electrical Operated. Air operated segment accounted for the highest share of the industry in 2019. Air-operated diaphragm pumps use compressed air as a power source, which enables them to transfer a wide variety of fluids including slurries, sludge, abrasive, and high viscous fluids. The segment is the growth of air operated segment is likely to gain momentum in the recent future, as it offers wide variety of applications in the chemical, pharmaceutical and oil and gas industries. The electrically operated segment is ideal for applications that require smooth flow and low pulsation. Instead of compressed air it uses electrical means such as an electric motor as a power source.

Based on Operation, The market is bifurcated into Single Acting and Double Acting. The market is led by double acting segment. These products use two diaphragms, which reciprocate backward and forward. One of the diaphragms forces fluid in the chamber while the other forces liquid in the discharge line. The diaphragms work as a parting wall between the air and the liquid.

Based on Application, The market is bifurcated into Pharmaceutical, Food & Beverages, Wastewater & Water, Chemicals & Petrochemicals, and Others. Among these, oil & gas and water & wastewater are the major application areas. In terms of revenue, oil & gas segment held the highest market share. The water & wastewater segment also accounted for a significant share of the global market in the past and is predicted to expand further over the forecast period. The chemical & petrochemical segment is projected to witness a healthy CAGR during the forecast period. These electric diaphragm pumps are best suitable for food & beverage, pharmaceutical, personal care industries.

Based on Regional Analysis, The Global Diaphragm Pump Market is classified into North America, Europe, Asia Pacific, and Rest of the world. The Asia Pacific is expected to lead the market over the forecast period. Increasing foreign direct investments coupled with rapid urbanization led to the growth of the Asia Pacific Diaphragm Pump Market. Moreover, the rising demand for energy fuel to the growing demand from a massive population can further augment the demand in this market. High demand for diaphragm pumps in countries such as France, Germany, U.K., and Italy has led to the demand in this market in Europe. Europe stands at the second position in terms of revenue due to high demand from the chemical, petrochemical, food, and beverages sectors. Moreover, the Middle East and Africa East and Africa require better and advanced water and wastewater management treatment that will boost the demand for diaphragm pumps in this region. The region has a large number of water and wastewater treatment plants due to the lack of freshwater sources. Growing freshwater demand due to rising population is expected to drive the market further.

The “Global Diaphragm Pump Market” study report will provide valuable insight with an emphasis on the global market. The major players in the market are IDEX Corporation, Pump Solutions Group, Flowserve Corporation, Yamada Corporation, LEWA GmbH, Grundfos Holding A/S, Verder International B.V., Ingersoll-Rand plc, TAPFLO AB, Xylem, Inc. The competitive landscape section also includes key development strategies, market share, and market ranking analysis of the above-mentioned players globally.

• In August 2019, Almatec, a subsidiary of Dover Corporation and a leading maker of speciality pumps, has announced two new versions in its solid plastic C series air-operated double diaphragm pumps. The C-40 and C-50 models have been added to the series. The pumps’ unique feature is the enhanced bolt torque, which ensures operational safety, as well as the exclusive air management technology, which boosts efficiency at lower operating temperatures.

• In April 2019, KNF launched the FP 400 diaphragm pump with reduced pulsation. The FP 400 is intended for recirculation applications in a wide range of market categories. The pump also combines the benefits of diaphragm pump technology with pulsation levels comparable to gear pumps.

Key Companies ProfiledIDEX Corporation, Pump Solutions Group, Flowserve Corporation, Yamada Corporation, LEWA GmbH, Grundfos Holding A/S, Verder International B.V.

Diaphragm Pump Market was valued at USD 5.66 Billion in 2020 and is projected to reach USD 9.13 Billion by 2028, growing at a CAGR of 6.14% from 2021 to 2028.

The major players in the market IDEX Corporation, Pump Solutions Group, Flowserve Corporation, Yamada Corporation, LEWA GmbH, Grundfos Holding A/S, Verder International B.V.

The sample report for the Diaphragm Pump Market can be obtained on demand from the website. Also, the 24*7 chat support & direct call services are provided to procure the sample report.

Air-operated double-diaphragm pumps (AODD) are preferred in transfer applications because their simple design makes them easy to operate and cost-effective to repair. To achieve top performance, end users must install and operate these pumps correctly. In a matter of minutes, common issues can be corrected with the right information.

Installing an air line that is too small is the most common mistake users make when installing an AODD pump. Using too small of an air line will starve the pump of the fuel—compressed air—it needs to operate at peak performance. Upgrading to a larger air line is an easy fix that takes a few minutes.

Double-diaphragm pumps come in all shapes and sizes, based on the application and fluid requirements. Larger AODD pumps (1-inch and greater) require more compressed air and larger air lines than smaller pumps to operate at full capacity.

The appropriate air line size for a pump is located in the manufacturer’s installation and operation manual. As a general guideline for AODD inlet air line sizes, match the air line hose size to the air inlet port size on the

Inlet air pressure also plays a key role in getting the most out of a pump. Diaphragm pumps operate on a 1-to-1 ratio, meaning the pressure of the inlet air feeding the pump is directly related to the fluid pressure at the pump’s outlet. For example, if the target outlet pressure of a 1-inch, 50-gallon-per-minute (gpm) pump is 100 pounds per square inch (psi), the inlet air pressure entering the pump’s air valve must be greater than or equal to 100 psi.

System backpressure and fluid viscosity will impact the outlet fluid pressure. Too little backpressure may cause the pump to run inefficiently because the ball checks may not check as quickly. Too much backpressure can cause the pump to stall if the fluid pressure overcomes the air pressure to the pump.

To control the performance (flow and pressure) of an AODD pump, install an air regulator assembly to control the incoming air pressure (see Figure 1, C). Installing the correct air line size with an air regulator will solve the most common AODD pump installation problem.

Diaphragm pumps can generate high decibels at full speed, a main reason mufflers are recommended during installation. The AODD air motor requires compressed air to operate. As the compressed air enters the air valve and channels through the pump center section to exhaust through the muffler, rapid temperature changes occur. At the muffler exhaust, air temperature is below freezing and can cause icing-related issues that are common in humid environments.

Erratic pump operation, inlet air with high levels of moisture or visible frost on the outside of the muffler are indications of an icing-related issue that is decreasing pump efficiency. Here are suggested solutions to eliminate these issues:

Solutions to icing can range in difficulty depending on the application and environment, but reducing the air pressure to the pump is one of the quickest and most effective ways to reduce icing.

Leakage is a common problem in all pump types. A few simple fixes can ensure the fluid stays in an AODD pump. First, pumps, especially plastic pumps, must be torqued to the manufacturer’s recommended rating. Materials relax over time—often referred to as cold flowing—which can cause sealing surfaces to loosen and create leak paths. Refer to the pump manual for torque values, and follow the bolting patterns to reduce the threat of leakage.

Reuse of polytetrafluoroethylene (PTFE) O-rings is another cause of leakage at sealing surfaces. A downfall of PTFE is resilience. Once a PTFE O-ring has been compressed, it is not capable of regenerating its original shape. Replace all pump PTFE O-rings when servicing an AODD pump.

After properly torquing the pump according to manufacturer recommendations and ensuring all sealing O-rings have been replaced after service, the AODD pump should be leak-free. Save significant rebuild time later on by ensuring the PTFE O-rings are replaced when the pump is rebuilt.

Pump inlet and outlet fluid port diameters vary based on the flow rate required. Inlet and outlet hose sizes must match the pump’s size. A primary concern is the risk of cavitation, which can increase repairs and maintenance costs. Changing tubing and piping size after installation is relatively fast. Knowing the correct size at installation eliminates the time and effort required to make a modification later.

For example, if a 1-inch pump has a half-inch inlet hose connected, the pump will not be able to operate at full capacity without the risk of cavitation. This risk increases dramatically as the desired fluid viscosity rises. In this example, the 1-inch pump should have a 1-inch inlet and outlet hose attached to prevent cavitation.

It is also recommended that an AODD pump be installed with a flexible inlet/outlet connection rather than being hard plumbed. As pump speed increases, vibration increases, which elevates the risk of loosening a hard plumb connection, creating the potential for leakage.

AODD pumps are popular when self-priming is required. Creating a low-pressure zone—less than the atmospheric pressure of 14.7 psi—inside the fluid bowls is how the AODD pump draws fluid. If air pressure supplied to the pump is too high, the pump will change over too quickly and there will not be enough time for the fluid to be drawn into the pump.

To solve this priming issue in a matter of seconds, slow down the pump by using the air regulator to decrease the air pressure entering the air valve. Once the pump speed has been reduced and the fluid has had enough time to enter the pump, increase the air pressure and operate the pump at a faster speed.

Certain restrictions create backpressure that may negatively affect the pump and potentially create cavitation that will increase maintenance. Take a minute to inspect the pump and connected piping to ensure there are no visible restrictions. Look for the following at both the pump’s inlet and outlet:

Listen carefully to the pump as it operates. Listen for erratic operation, which may be caused by an inlet hose that is too small or a problem related to icing. Hearing what sounds like gravel running through the pump or seeing flashing around the manifold elbows indicates cavitation and the need to correct the inlet or outlet tubing size or reduce the pump speed. Also, be sure to keep an eye out for kinks in the inlet and outlet lines or any valves that could be closed or restricted.

Spending a few minutes up front to ensure proper installation will save a tremendous amount of time correcting problems later. Following these steps can help end users spend less time trying to figure out problems with their AODD pumps and more time pumping.

If you are supplying pump supplies, you can find the most favorable prices at Alibaba.com. Whether you will be working with piston type or diaphragm mud pump systems, reciprocating or centrifugal, Alibaba.com has everything you need. You can also shop for different sizes diaphragm mud pump wholesale for your metering applications. If you operate a construction site, then you could need to find some concrete pump solutions that you can find at affordable rates at Alibaba.com. Visit the platform and browse through the collection of submersible and inline pump system, among other replaceable models.

A diaphragm mud pump comes in different makes and sizes, and you buy the tool depending on the application. The pump used by a filling station is not the one you use to fill up your tanks. There are high flow rate low pressure systems used to transfer fluids axially. On the other hand, you can go with radial ones dealing with a low flow rate and high-pressure fluid. The mixed flow pump variety combines radial and axial transfer mechanisms and works with medium flow and pressure fluids. Depending on what it will be pumping, you can then choose the diaphragm mud pump of choice from the collection at Alibaba.com.

Alibaba.com has been an excellent wholesale supplier of diaphragm mud pump for years. The supply consists of a vast number of brands to choose from, comes in different sizes, operations, and power sources. You can get a pump for residential and large commercial applications from the collection. Whether you want a water pump for your home, or run a repair and maintenance business, and need a supply of diiphrag m mud pump, you can find the product you want from the vast collection at Alibaba.com.therther it is for refrigeration, air conditioning, transfer, or a simple car wash business, anything you want, Alibaba.com has it.

Mud Sucker Pro Series air driven diaphragm pumps use check ball technology in the suction and discharge valve chambers to pump slurries, abrasive fluids, solids and general wastewater. Access to both the suction and discharge areas is available within seconds.

The Mud Sucker 4B-EC includes a standard emergency pressure relief valve. Since a diaphragm pump is also a positive displacement pump, a pressure relief valve reduces the chances of damage in an over pressurization event.

The only diaphragm pump in the industry with an exclusive pump body designed to enhance the flow of slurries and debris laden liquids to prevent clogs.

Ships complete with safety guards. Pump operator does not come into contact with moving components when guards are in place (removed in illustration above for clarity).

An air operated double diaphragm pump is a very reliable pump type and certainly very easy to operate and maintain. Nevertheless, there are a number of things that allow you to “kill” your pump.

Dry running an AODD will not have an immediate negative effect on your pump, but an AODD who runs dry will speed up. This will not only cause a bigger air consumption but the diaphragms will make a lot of strokes and will come to the end of their elasticity much quicker and will fail. To prevent this you can use a “Flow Stop Valve” in the air supply to your pump. This valve will detect the bigger air consumption and will close down the air supply to the pump.

Air moisture and air quality are of utmost importance high moist or bad quality of the air can cause icing or clogging of the air valve or muffler; the moisture will condense in the air exhaust because of temperature drop from high to low pressure and will cause clogging the muffler. Also waste collected over time can cause clogging. Use clean, dry, filtered air to avoid clogging/icing of the muffler. Check the muffler on dirt on a regular basis and check the quality of the air you use to operate the pump. If the plant air is from low quality the use of an ”Anti-Ice Muffler” and Installing an air filter in the compressed air line before the pump will also help you to run the pump error free.

An incorrect diaphragm selection can cause rupture of the diaphragm and many other problems to the pump. The lifetime of diaphragms depends strongly on the material the diaphragm is made of. Always check if the material of your diaphragm is resistant against the liquid you are pumping. PTFE diaphragms can be used on almost all chemical applications, but doesn’t have the best mechanical strength so will be prone to wear in abrasive applications. Diaphragms made of molded PTFE on a rubber layer will give a better result on this kind of applications. If not sure, ask a specialist which material to use as diaphragm will give you the best cost/lifetime combination for your application.

If you run an AODD fast on abrasive applications, the valve seats and balls will run out very quickly. Also the life-time of your diaphragms will be reduced. On those applications you will need to use a bigger pump running slower.

Not efficient AODD pumps will have a bigger air consumption and will need more time to do the job. This will generate more maintenance not only at the pump, but also on the compressed air installation. (compressor, dryer, supply pipes,…)

Rapid acting air valves & an innovative flow pattern inside the pump are resulting in a higher flow rate, lower air consumption and less maintenance of a pump and compressed air installation. Verder offers those features with the Verderair double diaphragm pumps. This results in an increased productivity, reducing operational cost and improve working environment.

Verder Liquids manufactures pumps, mixers and systems. These pumps are distributed through 27 Verder offices, completed with a worldwide network of local distributors. Verder Liquids is offering local presence, local service and fast delivery times.

DOSmart AC is a series of dosing pumps with a step motor and advanced control functions to automate precisely and efficiently the dosing of chemicals in liquid state.

... proven PULSA Series® 680 is a leak-free, hydraulically balanced diaphragm metering pump. It is engineered for precise dosing and long-term dependability to deliver superior value. Our flat diaphragm ...

The N87 TTE is a reliable diaphragm pump with compact dimensions that guarantee an optimum integration in systems and devices. It has a highly gas tight ...

Pump system is designed on basis of industrial diaphragm pump «Selwood Spate PD-75». The pump system is designed for fluids transfer – pollute water, oil, oil products. ...

Diaphragm pump especially designed for transferring AdBlue Motor: Ventilated in 220v Max. working pressure: 1,6 bar Flow: 40 l/min (220v.) Self priming: 4 meters IN / OUT: 1” Female Handle including

JLM-S series solenoid diaphragm metering pump is LIGAO newly designed digital pump with an advanced microprocessor control board. The innovative big LED screen display the instant flow ...

Tje PSG DOVER"s Neptune Model 5003/5005 hydraulic diaphragm metering pumps are specifically made for low volume flows, with higher discharge pressure when compared to mechanical diaphragm ...

... setting of extremely small pressures.The technical data are based on an air inlet pressure of 8 bar. The pumps of course also function perfectly at low pressures.Krautzberger diaphragm ...

Self priming diaphragm pumps are lightweight and with high performance and ensure the pumping of liquids even under conditions of water inflows intermittently.

DJ mechanical diaphragm metering pump (dosing pump) is widely used in petroleum, chemical industry, spinning, food industry, papermaking, atomic energy, power plants, plastics, pharmacy, ...

... are portable electric-pump units used to supply couplant to wedges during ultrasonic inspections. Both units are equipped with a diaphragm pump that has a bypass to ensure a constant ...

... Melton’s DD-1 Diaphragm Pump represents an innovative breakthrough in pump design. The electronic reversing control is extremely reliable and is not affected by normal wear characteristics ...

... Pamasol diaphragm pump has been developed to fill suspensions with HFA 134a or 227. It is specially appropriated to pump the suspension continuously from the mixing tank to the machine ...

Q. We have an old wastewater pretreatment system for our metal finishing operation. The system contains two large air diaphragm pumps that transfer the wastewater from a holding tank to the flocculation tank before the clarifier. Since we are renovating the pretreatment system to extend its life, our team is arguing over whether to replace or keep these pumps.

Since one of the pumps is for operating and the other is for standby, when they do need to be serviced we can keep the system in operation. I propose that we replace them with centrifugal pumps due to the diaphragm pumps’ high maintenance, replacing diaphragms and check valves.

Others say that we should keep them because we already have compressed air and do not need to bring additional electrical power. What is your recommendation regarding this situation? S.D.E.

A. In terms of energy costs, compressed air is the most inefficient utility used in metal finishing operations. Add more maintenance, and in our experience, a well-specified and selected centrifugal pump wins hands-down over an air operated diaphragm pump (AODP).

Compared with a centrifugal pump, an AODP has a number of moving parts: air handling system, diaphragms, and check valves. If the AODP is extensively used, which apparently the pumps you described are, then these pumps will have higher maintenance.

Furthermore, the compressed air system can be plagued with water, dirt, and lubrication issues unless it too is well maintained. While there have been great strides by AODP manufacturers to improve the reliability of the pump’s air handling system, especially with oil-free designs, poor compressed air quality will increase AODP maintenance frequency. Also, for those of us who experience cold winters, AODP can “freeze up” due to excessive moisture in the compressed air. Not only does one need to evaluate replacement costs but also labor costs and wastewater pretreatment system downtime on production.

An industrial rule of thumb is that an AODP will use about three times the electrical energy of an efficient centrifugal pump to move the same volume of water, and I have seen claims of up to seven times the energy. This energy differential does not take into account leaks and line losses in the compressed air system, which makes the AODP even more energy wasteful.

For example, a 2 hp, 230-volt, 3-phase electrical centrifugal pump will use about 5,000 kWh/year of electric power if operated 8 hrs/day, 250 days/year. Assuming electrical rates of $0.07–$0.10 per kWh, the annual electrical costs are $350 and $500, respectively.

Our rule of thumb is that for electrical motors of one hp or higher, it is definitely more favorable to choose a three-phase motor over a single-phase motor. Not only are three-phase motors typically more efficient, but there is also typically no cost for step-down transformers.

Based on how your wastewater pretreatment is set up, we also recommend that your anionic polymer feed be injected next to the intakes of the proposed centrifugal pumps. The high shear that is experienced inside the centrifugal pump’s casing does an excellent job of dispersing the polymer within the wastewater so that it can work more effectively in your flocculation tank.

Pumping of flocculated particles to a wastewater clarifier, sludge holding tank, or filter press since the centrifugal pump would tear apart these floc-culated particles to the detriment of the down-stream process unit,

Pumping of wastewter from sumps, tanks, or pipes with insufficient storage volume, resulting in frequent and very short pumping cycles. Our plumbing designers insist on a 3 min (but prefer a 5 min) minimum pumping cycle for centrifugal pumps in order toprotect the electrical motorfrom a short life, and

Pumping of concentrated waste streams (acid, caustics, oxidiz-ers, hexavalent chrome, cyanide waste) where small, controllableand easily adjustable flow ratesare needed to introduce these waste streams into a wastewater pretreatment system.

This cost effective and maintenance free pulsating diaphragm pump will operate efficiently with mold, PCM and TEM cassettes. It’s lightweight and easy to use. The Diaphragm Sampling Pump is designed for continuous draw. It has an adjustable regulator with a lock ring. The 9805 comes with an adjustable aluminum tripod.