The most common causes of blower failure are very easy to avoid. During my years of providing technical assistance to Republic clients, we most commonly run into either one of two issues that lead to failure: (1) Poor Filter Maintenance, or (2)Ineffective Relief Valve Setup.

POOR FILTER MAINTENANCE

These blowers, as with most airflow technologies, are air cooled machines.  They must keep a steady stream of air moving through them to dissipate the heat that is generated through compression.  When filters are not changed often enough, they can become clogged and eventually reduce the airflow enough that the delta T exceeds the blower’s ability to get rid of that heat and the temperature slowly rises until it reaches a critical point of failure.

Maintenance Recommendations

Filters should be changed as needed to maintain a differential pressure of less than 10″ of water pressure differential. The dial on your filter change gauge should be in the green zone. Typical change intervals are between every two weeks and 90 days, depending on contamination levels in your plant. For more consultation, contact Republic.

INEFFECTIVE RELIEF VALVE SETUP

The function of a relief valve, is to provide a pathway for air to exit the air system when a certain pressure is reached.  If there is any question as to whether you should opt for a relief valve when purchasing a blower, we recommend doing so and  to have a trained technician set it up.

When relief valves are not set properly, it means that they are set to activate at a higher pressure or vacuum level than the blower is even capable of producing, which does not protect the blower at all.  Should the downstream airflow become blocked or “dead headed” then the blower will attempt to overcome that blockage thereby spiking it’s pressure levels, potentially above its maximum.  The relief valve should activate at this point, letting air escape the system without overloading the blower.

If you think you have an improperly set relief valve you can contact Republic for consultation, maintenance and replacements.

 

 

Written by: Ben Millican

Many times, I’m asked if it’s normal for a blower to get very hot while operating. This of course depends on just how hot the blower is getting, but the act of compression does cause an increase in temperature, also called delta T.  Typically, the discharge temperature should be below 200 degrees Fahrenheit or it begins to significantly reduce bearing life and extreme temperatures can cause thermal expansion of the internal components leading to failure.

For more information or for replacement parts, contact us (www.republic-mfg.com).

Written by Ben Millican

IMG_5622

Nick brings the gifts around on the fork lift; Classic Republic Style.

Every Christmas season, Republic adopts a family in need from Children’s Health. The program is called Adopt a Family. Every year, Children’s Health provides volunteers with the option to choose from families of all shapes and sizes; each one includes a current patient, some with a terminal illness. Once volunteers receive a gift list from their family, employees get to shopping and provide wrapped gifts to the family along with a gift card from the closest grocery store, so that the family can have a nice Christmas dinner.

This year Republic adopted a large family of eight, which included our strong 14 year old patient, Sherry*. Eight years ago, Sherry was diagnosed with Hepatoblastoma. Between then and now, she battled with recurrences of her cancer. This summer, she was on her way to full recovery when her cancer returned. This time, it is mostly non-treatable.

IMG_5660

David, Nathalie, Barbara, and Chloe send off the family’s gifts. We hope they enjoy them.

We smiled when we received Sherry’s Christmas list. Her list resembled that of a young girl that didn’t need much to be happy. She asked for a “fancy dress,” a “prom-like necklace,” Pokémon cards, and candy. While we bought presents for her and her family to enjoy, we felt a grand sense of fulfillment from being able to take part in such a special girl’s Christmas celebration. We hope she liked what we picked out for her.

 

Republic is honored to do what we can to make this time of the year memorable for Children’s Health patients. Click here, if you’d like to learn more about Children’s Adopt a Family program.

 

Merry Christmas and Happy New Year, from the Republic family.

Previous Image
Next Image

info heading

info content

 

*Name changed for privacy.

 

Written by Chloe Chavez

Regenerative blowers, as a technology, are typically only meant to handle fairly standard ambient temperatures up to a hot summer day outdoors.  They are not meant to handle any kind of heated inlet air, which should be handled by more advanced technologies such as our centrifugal blowers with water cooled bearings.

Within the next few weeks, I will post more information about choosing the right blower for your application.

We welcome you to post any questions you may have about this article in the comments section below.

[Related Blog Post: How Does Horsepower Factor In When Replacing My Regenerative Blower]

 

Written by: Ben Millican

Often, I receive calls that sound similar to this, “I have an X horsepower blower that I want to replace with a Republic blower.  What blower do I need?”

Many times companies will try to match up blowers simply based on horsepower size and this can quickly lead to operation problems in the field.  Even among just regenerative blowers there can be vast performance differences between blowers with identical horsepower due to design intentions, such as the difference between a single stage or a double stage blower.  One blower may be intended to create very high flow at a low pressure and another may create 2 to 3 times that pressure at a lower flow.


When replacing a blower, always match performance curves, not the horsepower.


Within the next few weeks, I will post more information about choosing the right blower.

We welcome you to post any questions you may have about this article in the comments section below.

[Related Blog Post: Accurately Sizing A Centrifugal Blower]

 

Written by: Ben Millican


Nozzle knives provide a precise, concentrated air flow and work great at drying cans, kegs and other packaging that has hard to reach crevasses.


An inadequate air knife system could cause very expensive problems. Packaging that is insufficiently dried could lead to labeling and printing issues, rusting and more over, poor quality that negatively affects your brand image.

Recently, a brewery contacted Republic because they had an issue with coding their kegs. Apparently, their air knife drying system was not properly drying the top of their kegs. After the kegs ran through their drying system, they were then stamped with an ID code. Because the kegs were not sufficiently dried, the code would easily rub off. Once the keg would arrive at a restaurant or bar, the recipients would then have to turn the kegs away because they were not properly coded. Can you guess how much this costed the brewery in delivery, restocking, reprocessing and customer satisfaction? Let’s just say the number makes our cheeks red.

The Republic team engineered a nozzle knife system to replace the insufficient air knives. Nozzle knives provide a precise, concentrated air flow and work great at drying cans, kegs and other packaging that has hard to reach crevasses. Air knives, including air nozzles and accessories are manufactured in-house, at Republic Manufacturing.

(Watch this video of a Republic employee forming an air knife.)

Learn more about how Republic serves the Beverage Industry.

Written by: Chloe Chavez

Republic will get this question a lot, “Is your RB1200 big enough for…?” For many, this seems like a fair question when inquiring about a centrifugal blower for purchase. On the contrary, there are several details that you should focus on when selecting your pump. We’ve compiled a list of three criterion that will help you find the right blower for your application.

While Republic offers a well-established lineup of centrifugal blowers, ranging from a shoe-box-sized RB500 to the half-ton RB4000, “big enough” is not always the right question. There are several questions to be asked, each taking into consideration the nature of the application and the physics of moving air.

New-RB-4000

There are several questions to be asked, each taking into consideration the nature of the application and the physics of moving air.

Sizing the appropriate blower is a three-step process.

  1. Understand and characterize the system.
  2. Select a design point.
  3. Select a blower that can operate at that design point.

For the sake of this post, an aerodynamic system is the piping into or out of the blower. Each length of tubing or pipe, elbow, valve, and nozzle affects this system. A customer may have, for example, a nozzle with which to blow chips from machined parts. The system, in this case, is the inlet to the blower (usually covered by a filter canister), the blower itself, and tubing or hose from the blower to the nozzle. Each component has a resistance, similar to an electrical circuit, that robs some pressure from the system. Valves, nozzles, and elbows tend to have high resistance, while hoses and conduits have low resistance.


Each component has a resistance, similar to an electrical circuit, that robs some pressure from the system. Valves, nozzles, and elbows tend to have high resistance, while hoses and conduits have low resistance.


In most cases, a big enough and short enough hose is used that it can be disregarded. The nozzle becomes the main focus. Through testing, the resistance for the nozzle can be plotted on a graph of flow and pressure. Republic has this data for all our nozzles and air knives, allowing us to accurately size these systems. Shown below is a typical test result for an array of ten ½” diameter nozzles. As shown, resistance is usually approximated well by the form Pressure = C (Flow2) for inlet pressures less than 15psig.

Pictured: A typical test result for an array of ten ½” diameter nozzles. As shown, resistance is usually approximated well by the form Pressure = C (Flow2) for inlet pressures less than 15psig.

Pictured: A typical test result for an array of ten ½” diameter nozzles. As shown, resistance is usually approximated well by the form Pressure = C (Flow2) for inlet pressures less than 15psig.

If the end user desires a total system output of 400CFM, this graph clearly shows a target pressure of around 70 inches water column is required. This is our design point, the second element in selecting a system. By working to understand the system well, the design point is easy to find.

The third step is selecting the blower. By overlaying this curve on a published blower performance curve, the goal becomes simply selecting the point of intersection. Below is the curve for Republic’s RB800 blower, with the system resistance superimposed over-top.

By overlaying this curve on a published blower performance curve, the goal becomes simply selecting the point of intersection. Tracing up from 400CFM, the curves intersect in the yellow range, indicating a 10HP motor is necessary.

By overlaying this curve on a published blower performance curve, the goal becomes simply selecting the point of intersection. Tracing up from 400CFM, the curves intersect in the yellow range, indicating a 10HP motor is necessary.

Tracing up from 400CFM, the curves intersect in the yellow range, indicating a 10HP motor is necessary, closest to the line for 16,200rpm (a 1.65 pulley), as noted on the vertical axis. This indicates that, for the given 10-nozzle system, a 10HP RB800 with a 1.65 pulley will stabilize around 400 CFM and 70 inches water column.

As the system gets more complex, whether by adding manifolds, exchangers, etc. or valves and gates, the resistance curve will change. Also, if the blower is working in a different environment (low atmospheric pressure from high altitudes, or moving a gas other than air), the blower performance curve shifts. Republic has trained sales staff and engineers able to assist in specifying the correct blower for these unusual environments, and several years of experience doing so.

Written by: Nathan Wilson

This Magugliani SRL Drying System dries 24,000 bottles per hour before bottles enter a labeling line.

 


MAGUGLIANI SRLRepublic is an American Manufacturer that works with distributors located around the world. Magugliani SRL, a local Italian company, specializes in manufacturing high quality machines for drying of bottles, jars and cans. Magugliani SRL places Republic Air Knives and Centrifugal Blowers in the drying systems they manufacture. You can find more of their on-site videos here.

Republic Air Knives are engineered, manufactured and tested by Republic staff in the United States. Air knives are available in extruded aluminum or stainless steel, in 2″, 3″ and 4″. Nozzle air knives, dual inlet air knives, and accessories are available for your custom pressure and air stream needs. Moreover, Republic accessories are also made in-house to allow for optimal performance.

Our robust design for Republic Centrifugal Blowers is efficient, durable and easy to maintain. Low energy consumption allows for increased production levels for your air knife system. Recently, we’ve made our blowers’ bushing 9x stronger! You can learn more about this Tension Pulley Innovation here.

Today, we wrap up laser work for the All-In-One Enclosure that will be featured at Pack Expo, this September. Next stop is assembly, testing, and finally, Las Vegas! We are looking forward to seeing everyone at our booth (#7350)!

About Pack Expo
From 1995 to today, PACK EXPO Las Vegas has steadily grown into the largest processing and packaging event of the year. There will be 1,800 in attendance, plus exhibitors offering processing and packaging solutions for virtually every industry. For more information, visit: www.packexpo.com.

Republic-at-Pack-Expo-2Republic at Pack Expo

When: September 28 – 30, 2015
Where: Booth #7350
3150 Paradise Rd., Las Vegas, NV 89109

Previous Image
Next Image

info heading

info content

Last week, I accompanied our Latin American Sales Manager, Gerardo Alaniz on a visit to Chilé.  We met with prospective distributors and provided consultation.

Beverage Packaging Factory Looks For A More Effective Drying System

First, we met with a prospective distributor that builds drying systems for their customers, among other things. They are having issues with an existing principle, specifically the variable-frequency drive (VFD). Republic does not use VFDs on systems that are exposed to moisture, the conditions are not ideal for VFDs. While a VFD is a great option for many other applications, they are quite expensive to replace. Republic uses a bearing housing assembly that lasts much, much longer in moist environments.

The next day, this prospective distributor took us to meet with a local beverage packaging factory, who is looking to replace their ineffective drying system.  As a short-term solution, they replaced their air knife drying system with compressed air. (Read about Centrifugal Air VS Compressed Air) After inspecting the ineffective system, i found that the air knives were too short. The output air did not cover the entire bottle. We were able to help quote out a new and very promising air knife drying system for their client.

Centrifugal Blowers Beat Out PD Blowers For This Very Interesting Application

Our next stop included a very interesting application for our blowers. This customer uses three of our centrifugal blowers (200-9600HC) to gather up sand and water that is used to remove  worn out road lines, this is a process that is done before relocating the placement of road lines or freshening up the paint. This customer previously used a positive displacement blower (pd blower) for this application, but found that they could adequately do the job with a centrifugal blower, while creating less noise and avoiding lock-ups due to rusting. While inspecting their setup, we noticed that the sand was slowly eating away at their impellers. To decrease the rate of erosion of this vital part, and to avoid disruption of operations, we advised them to use stainless steel impellers and stainless steel housings.

Centrifugal Blowers and Vacuum Pumps in Wineries

Lastly, we met with a drying system consultant that serves a good many Chilé wineries. Wineries use drying systems and vacuum pumps in their processes. Drying systems are used to dry wine bottles before and after being labeled. Vacuum pumps are used to crush grapes in the wine press and corking process. During the corking process a vacuum pump is used to remove air out of the wine bottle while nitrogen is injected into it to keep it fresh.

My Experience of Chilé During Its Winter Season

Although it is winter time in Chilé, the locals seemed to really enjoy the outdoors. The streets were full of entertainers and friends playing board games, and shopping. Gerardo and I visited Los Dominicos, an area with a ton of outdoor local shops. We had lunch outside everyday. I especially enjoyed parrilla, which is a steak dish, served over french fries or yuca. Chile´s subway system was definitely cleaner than the NY subways from last month’s trip. An interesting fact we learned; If you drive an hour north of the airport, you’ll arrive at a ski resort. If you’d like something different, drive an hour south and you’ll arrive at a beach.Be sure to check out my photos from last week’s adventure.

 

Written by: David Gradney