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  • The New T-Shirts Are In! Pick Yours Up!!!

    We are Livin The Dream! 

    Campbell-Sevey's new "Livin' The Dream With Steam" t-shirts are hot off the press. So get yours now!

    These shirts are extremely comfortable, even during the heat of summer. 

    Stop by the office to pick up your FREE T-SHIRT in the size that is fit for just for you – 15350 Minnetonka Blvd., Minnetonka, MN.



  • Wondering Why Your Steam Piping Is Making That Funny Noise?

    Want to know why your condensate pump sounds like someone dropped a bag of marbles in it? 

    You know you need a vacuum breaker, but you don't really understand why?

    Need some training so you understand what’s really going on in your steam system? 

    C’mon over to Campbell-Sevey!  

    We talk all about all of these things in our engaging full day seminar. Campbell-Sevey's live steam training room, with glass bodied steam traps and glass piping, provides a rare inside look at how steam systems and traps really operate. 

    Plus, your boss is buying lunch since it’s included in the cost of the class. What could be better than a free lunch at Famous Dave’s? Click to learn more and register for our next session. 


  • The Impact of Tariffs on the Steam Industry

    With recent government announcements of tariff hikes on steel and aluminum imports, the impact on the steam, air, and water industry is expected to be significant. 

    Raw materials like steel and aluminum typically account for over 50% of costs associated with process equipment. With tariffs on imports increasing by 25%, we encourage our customers to budget an extra 10% - 25% for equipment to cover the added costs. 

    Already prices of raw materials have increased sharply since January 2018 as shown in the charts below:

    This will impact many of our vendors: Armstrong steel products, Johnston boilers, condensate pump packages, BFS deaerators, boiler stacks, flash tanks, and separators to name some of them.

    We encourage customers to order equipment early if possible, to minimize the impact the tariffs will have on their budgets. If you have questions regarding how this may impact your company, contact the team at Campbell-Sevey


  • Changing Refrigerant? You May Need to Change Cooling Coils Too

    Changing from R-22 to R-410A or some other refrigerant, means you need to change your cooling coil. 

    As of 2010, R-22 (often referred to as Freon®) was discontinued for use in new air conditioning systems. Because R-410A can absorb and release more heat than R-22, newer air conditioning compressors can run cooler, reducing the risk of compressor burnout due to overheating.

    However, because R-410A also functions at a higher pressure than R-22, if you were to put R-410A refrigerant into a system designed for R-22, the pressure would be too much and the unit would break. Therefore you the cooling coils need to be changed also. 

    Contact Campbell-Sevey where we can help resize the coils for you to best fit your needs.  


  • Test Your Knowledge: Recirculation Noise

    Noise created during steam recirculation noise can not only be annoying, but cause damage to steam systems. So what causes recirculation noise in a steam system?

    1. High differential pressure across orifice
    2. Insufficient back pressure downstream
    3. Improper sizing of baffle 
    4. Orifices discharging into tank below water line
    5. Too much back pressure cause by globe value

    And the answer is...

    Both 1 and 2!

    Recirculation noise is a result of high differential pressure across orifice which causes cavitation downstream (formation and consequent collapse of steam bubbles). It can also be caused by insufficient back pressure downstream. 

    If a circulator pump or hydronic heat piping contains unwanted air, cavitation in the pump due to the presence of the air can make a pump abnormally noisy as well as make a bubbling or gurgling sound in the building hot water heating pipes.

    The noise happens most commonly with pump duty point 150 psig and higher at shut-off. Recirculation noise typically isn't heard at lower pressure. A manifold sized to accommodate multiple recirculation flows can also cause it as it reduces back pressure when running less pumps. 

    The effect...

    • Recirculation cavitation creates loud reverberating popping noise similar to pump cavitation
    • May pit pipe wall and nearby fittings over time
    • Unhappy employees in boiler room
    • Recirculation flashing does NOT damage pump or affect pump performance


    When re-working a noisy installation there are three approaches you can take:

    Add a Globe Valve

    Add a glove valve on header to tank to introduce back pressure and inhibit flashing. 




    Add Second Orifice

    If the tank includes a single recirculation connection, requiring a recirculation manifold, consider adding a second orifice nipple downstream as space allows. Size each orifice to take half the drop.

    Install Individual Recirculation Lines 

    On the front end, install individual recirculation lines with orifices discharging into tank below the water line, letting the water be the baffle. This is the most mechanically "sound" solution.

    Eventually air leaking into a heating system (or low water volume in the hot water heating system) leads to loss of heat so it is something that should be corrected. For more information on which solution may work best to resolve your recirculation noise issue contact the team at Campbell-Sevey.

  • Selecting the Right Control Valve

    Control valve selection and installation is a vital process that can have a profound effect on the effectiveness of a fluid system.  Specifically, process conditions and how they impact the selection process are important to understand.

    To help identify some of the key factors and process conditions that affect the decision, DFT Valves has created a new eBook detailing a number of important details. In Selecting Control Valves, you will learn:

    • How the type of valve can influence the impact of certain process conditions
    • The relationship between flow rate and pressure and what this can mean for your system
    • How temperature and pressure directly impact the selection process
    • Tips to find the proper information needed in control valve selection

    To learn more about these and a number of other factors in the control valve selection process, download the ebook or contact the team at Campbell-Sevey


  • Steam Trap Surveys? But It's Hot Outside!

    So who thinks about doing steam trap surveys in the summer?

    By now you know leaking steam traps can cost as much as $300 - $3000 per trap in energy losses and that steam trap surveys can significantly increase plant efficiency, but what you may not realize is that now is the time to get them done. 

    The entire process from steam trap survey to installation takes time. The complete process includes:

    • Schedule the survey
    • Enter data
    • Generate reports
    • Present data
    • Secure and release funding
    • Purchase parts/traps
    • Installation

    Because of these steps involved, now is the time to started so they can completed by heating season. So kick off summer by contacting Campbell-Sevey to schedule your steam trap survey today.  

  • The Space Savings Benefits of GRZ Grease Ducts

    Van-Packer's Model GRZ is suitable for the removal of smoke and grease laden vapors from commercial, industrial, institutional, and similar cooking applications. 


    THE Model GRZ fire rated, zero clearance grease duct saves space. The ducts are commonly smaller and allow multiple ducts to be run in a common shaft with minimal clearance space. It can also be installed with no shaft requirements, because the Model GRZ in itself is considered a fire rated enclosure when fire stops are used at the floor openings. 

    When fire rated duct penetrates a fire rated partition (floor, ceiling or wall), other manufacturer’s instructions require that the duct be centered in a precisely sized hole. The GRZ fire stop penetration design allows the space between the outside surface of the duct and the inside of the hole to vary from 1” to 4”. GRZ grease ducts provide for a more flexible application, reducing labor cost, and exceeding UL 2221 standards. 

    UL 1978 TESTED

    According to the NFPA, cooking equipment is responsible for 57% of restaurant fires – which causes fires in the grease duct.

    All Van-Packer grease duct products are tested, listed and labeled to UL 1978, Standard for Grease Duct. In addition, Models GZ and GRZ grease ducts are tested, listed and labeled to UL 2221, Tests of Fire Resistive Grease Duct Enclosure Assemblies. The requirements of these standards far exceed conditions encountered in the real world. 


    In many circumstances, wrapped, welded, carbon steel duct, may sag and deform during a grease fire due to the intense heat that is produced in a grease fire. A wrapped duct often has no reinforcement when built, so in a fire can collapse, as shown in the photo. Van-Packer's unique integral design keeps their duct Model GRZ from collapsing, even when exposed to temperatures of 2000 Degrees. Under ETL’s rigorous testing, it was rare for the duct to even slightly deform, and far exceeded UL 2221 acceptance criteria. 


    Campbell-Sevey is proud to carry Van Packer's Model GRZ because we are confident that a grease duct system designed and installed with it will be safe and in service for many years to come. To learn more click to download the Model GRZ spec sheet or contact the team at Campbell-Sevey.  


  • Steam Tip 24: Upgrade Boilers with Energy Efficient Burners

    The purpose of the burner is to mix molecules of fuel with molecules of air. A boiler will run only as well as the burner performs. A poorly designed boiler with an efficient burner may perform better than a well-designed boiler with a poor burner. Burners are designed to maximize combustion efficiency while minimizing the release of emissions. 

    A power burner mechanically mixes fuel and combustion air and injects the mixture into the combustion chamber. All power burners essentially provide complete combustion while maintaining flame stabilization over a range of firing rates. Different burners, however, require different amounts of excess air and have different turndown ratios. The turndown ratio is the maximum inlet fuel or firing rate divided by the minimum firing rate. 

    An efficient natural gas burner requires only 2% to 3% excess oxygen, or 10% to 15% excess air in the flue gas, to burn fuel without forming excessive carbon monoxide. Most gas burners exhibit turndown ratios of 10:1 or 12:1 with little or no loss in combustion efficiency. Some burners offer turndowns of 20:1 on oil and up to 35:1 on gas. A higher turndown ratio reduces burner starts, provides better load control, saves wear and tear on the burner, reduces refractory wear, reduces purge-air requirements, and provides fuel savings. 

    Efficient Burner Technologies 

    An efficient burner provides the proper air-to-fuel mixture throughout the full range of firing rates, without constant adjustment. Many burners with complex linkage designs do not hold their air-to-fuel settings over time. Often, they are adjusted to provide high levels of excess air to compensate for inconsistencies in the burner performance. 

    An alternative to complex linkage designs, modern burners are increasingly using servomotors with parallel positioning to independently control the quantities of fuel and air delivered to the burner head. Controls without linkage allow for easy tune-ups and minor adjustments, while eliminating hysteresis, or lack of retraceability, and provide accurate point-to-point control. These controls provide consistent performance and repeatability as the burner adjusts to different firing rates. 

    Alternatives to electronic controls are burners with a single drive or jackshaft. Avoid purchasing standard burners that make use of linkages to provide single-point or proportional control. Linkage joints wear and rod-set screws can loosen, allowing slippage, the provision of suboptimal air-to-fuel ratios, and efficiency declines. 


    Consider purchasing a new energy-efficient burner if your existing burner is cycling on and off rapidly. Rotary-cup oil burners that have been converted to use natural gas are often inefficient. Determining the potential energy saved by replacing your existing burner with an energy-efficient burner requires several steps. First, complete recommended burner-maintenance requirements and tune your boiler. Conduct combustion-efficiency tests at full- and part-load firing rates. Then, compare the measured efficiency values with the performance of the new burner. Most manufacturers will provide guaranteed excess levels of oxygen, carbon monoxide, and nitrous oxide. 


    Even a small improvement in burner efficiency can provide significant savings. Consider a 50,000 pound-per-hour process boiler with a combustion efficiency of 79% (E1). The boiler annually consumes 500,000 million Btu (MMBtu) of natural gas. At a price of $8.00/MMBtu, the annual fuel cost is $4 million. What are the savings from an energy-efficient burner that improves combustion efficiency by 1%, 2%, or 3%? 

    Cost Savings = Fuel Consumption x Fuel Price x (1 - E1/E2) 

    If the installed cost is $75,000 for a new burner that provides an efficiency improvement of 2%, the simple payback on investment is: 

    Simple Payback = $75,000/$98,760/year = 0.76 year 

    Maintenance Requirements 

    Conduct burner maintenance at regular intervals. Wear on the firing head, diffuser, or igniter can result in air leakage or failure of the boiler to start. One burner distributor recommends maintenance four times per year, with the change of seasons. A change in weather results in a change in combustion. 

    Fan Selection 

    Fan selection is also important. Backward-curved fans provide more reliable air control than forward-curved fans. Radial-damper designs tend to provide more repeatable air control at lower firing rates than blade-type damper assemblies. 

    Steam Tip Information is adapted from material supplied by PBBS Equipment Corp. and Blesi-Evans Company and reviewed by the AMO Steam Technical Subcommittee. For additional information, 

    This tip is provided by the U.S. Department of Energy - Energy Efficiency and Renewable Energy and is adapted from material supplied by PBBS Equipment Corp. and Blesi-Evans Company and reviewed by the AMO Steam Technical Subcommittee. For suggested actions and resources, click to download the complete US Department of Energy Tip Sheet.  


  • QMax Expands Products and Services

    QMax has expanded their products and services to include QMax CST, their carbon steel tracing product used for hot oil tracing, and in-house fabrication capabilities. 

    QMax CST (Carbon Steel Tracing)

    QMax CST is SA178 Gr A boiler tubing formed to a 1” x 2.25” rectangle and contoured on one side to match the outside diameter of the process pipe. Specifically designed for long-run hot oil tracing, it can be pre-fabricated to customer specializations / drawings or it can be provided as parts and pieces to be fabricated in the field.  

    The QMax CST offers consistent results whether the goal is:

    • Process Temperature Maintenance
    • Minimum Pipe Wall Temperature Maintenance
    • Light-duty Process Heat-Up
    • Critical Process Freeze Protection

    The profile of QMax CST is customized to each individual pipe size to ensure optimum results for each application. They also provide process pipe fabrication so that the QMax CST can be pre-installed on the pipe saving time and money on capital projects. 

    QFX Fabricated Jackets

    QMax jackets are designed to create a "heat shield" effect around components such as flanges, nozzles, valves, pumps, meters, strainers and more, to eliminate freezing and cold spots around the equipment. These jackets are custom-made from carbon or stainless steel to fit process equipment and can be fabricated as bolt-on or weld-on. 

    QMax FX Bolt-On - These fabricated jackets are offered for most process piping equipment including fittings, valves, pumps, meters and strainers. These jackets are all custom fabricated and made to order but can be produced very quickly. Carbon steel is the standard jacket material, but other materials are available such as stainless steel, titanium and other exotic metals. The QFX jackets have a large heating chamber which provides efficient temperature control over the total surface of the equipment.

    QMax FX Weld-On - These fabricated jackets are offered for equipment such as fittings, valves and strainers. The jackets are custom fabricated and are welded directly to the process equipment. Like the Bolt-on option, various metals may be used. 

    QMax FX Technical Specifications:

    • Jacket Material: made to order 
    • Maximum Temperature: 900 F 
    • Standard Rating: 150 psig at 600 F (call for higher ratings)
    • Standard Connection Type: 1/2 inch FNPT (Many other connection types available)

    For more information on all QMax products to determine the best solutions for your applications, contact the team at Campbell-Sevey.

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952-935-2345  address15350 Minnetonka Blvd., Minnetonka, MN 55345

Products We Carry

  • Hot Water Boilers
  • Watertube Steam Boilers
  • Firetube Steam Boilers
  • Deaerators
  • Heat Recovery Steam Generators (HRSG’s)
  • Automatic Recirculation Valves
  • Economizers
  • Gas-Fired Water Heaters
  • Gas-Fired Humidifiers
  • Boiler/Generator Flue Stacks
  • Continuous Emissions Monitors (CEMS)
  • Pressure Reducing Valves
  • Safety and Relief Valves
  • Control Valves
  • Pressure Independent Control Valves
  • Expansion Joints, Guides, Anchors
  • Flash Tanks
  • Flow Meters
  • Balancing Valves
  • Check Valves
  • Separators
  • Pumps
  • Pressure Booster Systems
  • Piston Valves
  • Heating/Cooling Coils
  • Plate and Frame Heat Exchangers
  • Shell and Tube Exchangers
  • Water Heaters
  • Steam Humidifiers
  • Vacuum Systems
  • Condensers
  • Steam Traps
  • Wireless Steam Trap Monitors
  • Tube Bundles
  • Direct Gas-Fired Space Heaters
  • Direct Gas-Fired Make-Up Air Units
  • Unit Heaters
  • Strainers
  • Air Vents
  • Liquid Drainers
  • Heat Transfer Packages
  • Digital Water Mixing Valves
  • Air Cooled Condensers/Dry Coolers
  • Steam Filters
  • Electric Condensate Pumps
  • Steam/Air-Powered Condensate Pumps
  • Packaged Condensate Pump Skids