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Determining the Pump Configuration (#5 of 8)

This is the fifth of eight articles in the series Sizing & Selecting the Right Chemical Metering Pump.

This is where we take into consideration, the specific details of the application and everything that surrounds the pump. First, we should consider what kind of piping the pump needs to be connected to. What is the material, and what is the size? Does it need threaded connections (if so, male or female), or does it need flange type connections?

When the consistency and viscosity of the liquid get too thick then it could clog up in the valves and diaphragm head. For such liquids, it is important to use a tubular diaphragm where the liquid paths are more open, and it is easy to pass viscous and slurry type liquids.

On the other hand, if the temperature of the liquid being pumped is too high, it could negatively impact the hydraulic oil driving the pump and other components in the pump. For this we should consider using a remote diaphragm pump head,with which becomes a lot easier not only to keep the heat away from the rest of the pump, but also to remove heat with a cooling jacket around the remote head.

Then we should consider the application and whether a leak detection system is important. Many times in potable water or other food applications, customers prefer an early warning leak detection system so they can fix it before the oil in the pump contaminates the process lines.

There are two types of leak detection systems to consider. If the liquid being pumped is conductive then a conductive leak detection system is less expensive and effective. However, if that does not work there is a vacuum leak detection system option […]

By |June 24th, 2016|Metering Pumps Tips, News, Products, Selecting the Right Pump|3 Comments

Food Grade Oil Available!

Chemical metering pumps are popular in the food processing industry. They may be used in a wide variety of food processing including mixing ingredients, adding flavoring and preservatives, metering vitamins, and water conditioning. In these applications, incidental food contact may occur, and food grade lubricant oils are best recommended for the pumps.

Aquflow is proud to announce that we offer food grade oil with our metering pumps! Our waterproof and fully synthetic lube oils are biodegradable and do not emulsify with water. Their extreme pressure and low foaming properties make excellent lubricants for hydraulic systems in not only food processing, but also in water and wastewater treatment.

Please contact an AquFlow representative for more detailed information on our available grades.

By |May 17th, 2016|Metering Pumps Tips, News, Products|0 Comments

Selecting the right pump (#3 of 8)

This is the second of eight articles in the series Sizing & Selecting the Right Chemical Metering Pump. Read the previous article “Sizing your chemical metering pump and determining injection rate.”

Unlike most other decisions, this is the most subjective decision to make (unless you have tried various types and brands of pumps). This is also the most consequential decision in determining the level of success with your pump applications. There are many pump types and pump brands available in the market today. Each type and brand of pump has its unique positives and negatives. It is up to the user to choose the right type and brand for their unique application.

It is important to first know that all pump types are divided into two broad types: (1) Centrifugal and (2) Positive Displacement. While centrifugal pumps are the most common types of transfer pumps, they are not suitable in applications where the flow needs to be accurate and needs to overcome high pressures. In the context of chemical metering / dosing applications, a positive displacement pump is used almost all the time. Within the positive displacement pumps, there are many types. Below, we are going to discuss only the most common types used for chemical metering / dosing applications.

1. Gear Pump: As the name suggests, these pumps function by trapping liquid between gear teeth and pushing it from the suction to the discharge port. These are often used for hydraulic pressure developing. However, gear pumps are not suitable for accurate metering applications due to the leak back of liquid depending upon the clearances. These clearances will also tend to increase with wear.

2. Air Operated Diaphragm Pumps:This is a very versatile kind of pump and perhaps the most […]

AquFlow successfully completes large overseas project

Have you gotten the chance to see our 14 metering pumps designed for a large scale overseas project?

AquFlow was awarded a large chemical injection project for Kuwait National Petroleum Company in late 2015 which included several Series 3000 and Series 4000 pumps. These pumps were made to API 675 standards and included several options such as vacuum leak detection system, ECCA automatic stroke controller and special IEC motor adapters.

With this project we have further expanded our reach in Middle East and Asian market as the contracting company was Korean. AquFlow pumps were applied in a variety of applications including Neutralization Caustic injection, Polishing Sulfuric Acid injection and Demineralizing Sulfuric Acid.

By |April 25th, 2016|News, Products|0 Comments

Controlling Pump Capacity with ECCA

The pump capacity of hydraulic diaphragm metering pumps can be controlled both manually and automatically. Automatic adjustment can be handled by an Electronic Capacity Control (ECCA). This replaces the standard manual micrometer knob and can be mounted directly onto the pump. AquFlow’s ECCA uses miniaturized, state-of-the-art electronic technology built around an AC synchronous motor, which permits precise actuator travel, without hunting or overshoot.

The actuator may be housed in a NEMA 4X enclosure or NEMA 7 enclosure. Regardless of choice of enclosure, the ECCA is designed with convenient installation and maintenance in mind. Color-coded wiring leads simplify field installation and are fully encapsulated to keep moisture out. Encapsulated wiring leads also eliminate the need to open actuator housing to accomplish field wiring.

For more details and specs, visit our page or contact an AquFlow representative.

By |April 18th, 2016|News, Products, Pump Accessories|0 Comments

Leak Detection Systems for Hydraulic Diaphragm Metering Pumps

Aquflow hydraulically-actuated diaphragm metering pumps are by design both rugged and leakproof. However, in some difficult and/or critical chemical feeding applications, it is often desirable to add diaphragm leak detection – whether to protect the pump from hostile chemicals or to protect the process from possible contamination by hydraulic fluid.

For these applications, AquFlow has developed two highly reliable diaphragm leak detection systems. Your NPA sales representative can help you determine which system is best suited for your particular needs.

Series 3000 Pump w/ PVDF Liquid End and Conductivity Probe

Conductivity-Type Leak Detection

The conductivity-type leak detection system can be furnished on either tubular/disc diaphragm or double disc type diaphragm liquid ends. The system consists of a conductivity probe mounted in the pump intermediate chamber between the diaphragms. This intermediate chamber is filled with process compatible non-conductive fluid.

In the event of a diaphragm failure, process fluid leaking into the intermediate chamber results in a change of conductivity. This change in conductivity of the intermediate fluid increases probe current through the sensing circuit of the solid state control module. When the probe current exceeds the setpoint current, the control module energizes a relay output.

Series 1000 w/ Vacuum-Leak Detection

Vacuum-Type Leak Detection

The vacuum-type leak detection system is a highly reliable means of sensing diaphragm failure, and is frequently used when the process fluid will not allow a conductivity-type system. The vacuum-type system consists of two PTFE diaphragms held together under vacuum and separated by a thin, metallic intermediate ring. In this system, diaphragm failure is detected by sensing a change in vacuum pressure between the two diaphragms.

The complete leak detection system includes a vacuum gauge, tubing, purge valve, vacuum accumulator, and a factory preset vacuum switch. The U.L. listed SPDT vacuum switch […]

By |May 28th, 2015|Products, Uncategorized|1 Comment

Helpful Videos Available On Our Site!

Working Principle

Preparing for Installation

AquFlow has recently made a serious effort to make and publish instructional videos on our website. These videos can be watched on any platform including, PC, Tablets and Smart phones ( Apple, Android, etc.).

Following are some of the topics on which you can watch the videos today:

Bleeding Air from the Hydraulic Side

Replacing the Check Valve Seat

▪ How to start and operate and AquFlow pump
▪ How an AquFlow pump is assembled
▪ The working principle of a hydraulic diaphragm metering pump
▪ Proper maintenance of an AquFlow pump, including check valve seat replacement and purging trapped air
▪ And many more…

Click here to view our videos!

By |April 29th, 2015|Metering Pumps Tips, Products, Pump Accessories, Safety, Videos|0 Comments

A Simple Solution for Degassing Problems

AquFlow Series 1000

Some chemicals are susceptible to giving off gas while being moved or pumped. This challenge is especially complicated when this gas could get trapped in a small volume pump. Then the pump would not move any liquid as the gas trapped in the pump chamber would expand and contract with each stroke without moving any liquid. Fortunately, this is an issue AquFlow can easily overcome.

We have a special degassing diaphragm head which senses and expels the gas through a valve at the top where the gas usually tends to rise. This special design of the degassing head is very popular among municipal water and wastewater treatment facilities that use 12% sodium hypochlorite. With our assistance in proper pipe layout and a degassing head the possibility of degassing is minimized.

Parts schematic of a degassing diaphragm head and suction lift

AquFlow over the last 42 years have come up with many such specialized industry solutions such as IVAX (Intelligent Verification and Control System), tubular pump for viscous liquids, etc. Please visit our website to learn about various configurations and newest product developments at www.aquflow.com

By |April 27th, 2015|Metering Pumps Tips, News, Products, Pump Accessories|0 Comments

Skid-Mounted Systems Built Specifically for You

AquFlow offers customized ChemInjector systems based on your specified applications. We provide everything you need for an accurate chemical injector system. Most assemblies are skid-mounted, which is then placed at the site. Some chemical injector systems are too large for skid mounting. For very large systems, AquFlow provides on-site assembly as well as the option for mobile chemical injector stations.

Features:
* Systems are customized for you based on your chemical dispensing requirements.
* A complete turnkey system that can perform dependably and durably with minimal down time.
* Every component that goes into the system is pre-matched and tested so there are no incompatibility issues.
* On-site assembly available for systems that are too big for skid mounting.
* Mobile systems mounted on carts / trailers or other vehicles for covering long distances.

For more information on our standard ChemInjector packages and other available skid systems, contact our sales team at sales@aquflow.com.

By |March 26th, 2015|Case Studies, Metering Pumps Tips, News, Products, Pump Accessories|0 Comments

Four Differentiating Facts – Solenoid Vs Hydraulic Diaphragm Metering Pumps

Hydraulic Diaphragm Series 900

Solenoid Series 200

1. Cost of Ownership: While it is true that solenoid pumps are often less than half the purchase price of hydraulic diaphragm metering pumps, the total cost of ownership tells a completely different story. Hydraulic diaphragm metering pumps last over 10-15 years in the field with almost no maintenance. Solenoid pumps usually need service and replacement diaphragms every 6-9 months depending upon usage. Typically, a solenoid pump is considered good if it lasts 2-3 years in the field.

2. Balanced Diaphragm Vs Imbalanced Diaphragm: Hydraulic diaphragm pumps have process liquid on one side and hydraulic liquid on the other side to achieve balanced pressure on the diaphragm. This results in the diaphragm experiencing almost no mechanical stress which ensures a long life. On a solenoid metering pump, you have all the process pressure on one side with nothing to balance against it on the other side. This puts a lot of mechanical stress on the diaphragm and eventually causes bulging and failure.

3. Accuracy Matters: Due to the very nature of its design, hydraulic diaphragm pumps are extremely accurate throughout its life. That is the reason they are the only pumps that can meet API-675 standards. Solenoid pumps cannot because the diaphragm could bulge out or balloon even before it fails, which causes the accuracy to drop significantly.

4. High Performance: Solenoid pumps are good for low flow and low pressure applications usually under 100 psi. The duty cycle also needs to be very light. On the other hand, hydraulic diaphragm pumps can achieve flows and pressures hundreds of times higher than solenoid pumps. Hydraulic diaphragm pumps are also made for heavy duty or continuous operations 24/7.

So while solenoid pumps have their place […]

By |March 10th, 2015|Case Studies, Metering Pumps Tips, News, Products, Pump Accessories|0 Comments