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Mission Linen's Ribbon Cutting Ceremony for New LEED-certified Newark Facility!

Mission Linen Boiler Room

The ribbon cutting ceremony for Mission Linen’s newest facility in Newark, CA is happening today!

The 109,000-square-foot facility is designed to process 1,500,000 pounds of laundry each week and utilizes boiler room equipment provided by Nationwide Boiler Inc. With a silver Leadership in Energy and Environmental Design (LEED) certification, the company required equipment that was highly efficient and environmentally friendly.

Nationwide Boiler’s complete, high efficiency boiler room package contains the following equipment:

1. Two (2) Superior 475 hp Steam Boilers, including
  •      - Integral, factory engineered stack economizer mounts
  •      - Integral, factory engineered seismic anchoring system
         - 4-pass, high-efficiency firetube design
         - 150 psi ASME design rating 

2. Two (2) Power Flame Burners, including
     - Proven, sub 9 ppm, BAAQMD compliant and ultra low NOx
     - Siemens LMV52 Servo driven air / fuel ratio control with touchscreen operator interface
     - O2 trim
     - Variable speed driven combustion blower motors with rotational feedback
     - UL, CSD-1, Cal Code and NFPA approvals

3. Two (2) Superior 2-stage Stack Economizers, which
     - Provides a 6% efficiency gain and an overall boiler efficiency in excess of 87%
     - Incorporates a compact design within a single, easily installed package
     - Is supported by integral boiler mounts and installed above the stack

4. One (1) Superior Deaerating feedwater System, which
     - Allows for higher feedwater temperatures and increased energy storage
     - Removes harmful, non-condensable gases from the boiler feedwater
     - Captures condensate return energy while reducing flash steam losses
     - Pre-heats boiler feedwater, increasing boiler efficiency and reducing thermal shock

5. One (1) Industrial Steam Surface Blowdown Heat Recovery System, which
     - Cools surface blowdown effluent, benefiting underground drain lines and sewer connections
     - Improves efficiency by utilizing otherwise wasted energy to heat the soft make-up water
     - Recovers otherwise lost flash steam, routing it to the deaerator, reducing pegging steam demand

Nationwide Boiler is proud to support top quality and environmentally conscious businesses like Mission Linen. If you are in the area, take some time stop by their Newark facility today for a tour of their process and boiler room!

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New 110,000 lb/hr Superheat Boiler Provides Increased Steam Capacity

B700-2
With short summers and weather as unpredictable as it is charming, much of Newfoundland and Labrador relies on NARL Refining’s ability to provide warmth and clean fuel. We were able to assist with the refinery’s needs by providing them with one of our new in-stock 110,000 lb/hr trailer-mounted superheat boilers. The 750 psig design watertube boiler was manufactured by Babcock & Wilcox, who recommended Nationwide Boiler for the job per our stock boiler program.

To learn more about the boiler sale and how we were able to accommodate the customer’s need for an immediately available unit, read our latest case study. (PDF will download in a new window.)
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Protect Your Boiler From Freezing Conditions!

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We are well into the winter season, which calls for a quick reminder on freeze protection for any boiler equipment installed outdoors, whether it is a temporary rental boiler or your facility equipment. Taking the proper preventative measures will avoid operational difficulties and major damage to your system. During freezing weather conditions, Nationwide Boiler recommends the following:

1. Enclose both the front and rear of the boiler area and use an external heat source to minimize freezing conditions.

2. Install heat tracing with insulation to protect exposed stagnant water lines.

3. Utilize an appropriate heat tracing method (electric or steam tracing) to all of your main lines and piping components. This includes the following lines, which should be heat traced regardless of whether the boiler is in operation or not (in freezing conditions):

a. Sensing lines (steam drum to CRM, high steam, and steam gauge)
b. Auxiliary low-water cut-off
c. Water column
d. Level control blowdown
e. Main and continuous blowdown (depending on length of piping runs)

4. In addition to heat tracing on stagnant sensing lines, drain the lines and fill them with a 50/50 (water/glycol) solution, making sure to re-connect the line.

5. When an extended boiler down time is expected, completely drain the boiler and stagnant water lines.

The above are recommendations, however, be sure to use sound engineering judgement calls when there are concerns of possible freeze damage to the equipment. And remember, with most rental companies, any freeze damage that requires repairs or replacement of boiler components will be the responsibility of the customer, so it is imperative that you take the correct steps to freeze protect your temporary equipment.

For further details on our freeze protection recommendations, feel free to give us a call at 1-800-227-1966.

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Non-Return Valves: What, Why and How

Trailer-Mounted Boiler with Non-Return Valve
You may not know this, but all Nationwide Boiler rental boiler systems come standard with a non-return valve. These valves are vital to protect the boiler and other plant equipment and are required by the ASME. Let’s review the basics.

What is a non-return valve?
The main function of a non-return valve (NRV), otherwise known as stop or check valve, is to allow steam flow in one direction, and automatically prevent backflow. In other words, they prevent steam from flowing back to the main header of the boiler, or back to a boiler that has failed or is off-line.

An NRV can also be used to isolate a boiler during blowdown and shutdown, and to assist in returning a boiler to operation after any planned or unplanned maintenance.

Why are they needed?
The non-return valve is really just another safety device. Although the NRV should not be relied upon for primary shut-off, it does restrict the flow of steam back from the header into the boiler, which could be disastrous.

Per ASME standards, one NRV is required for one-boiler, high pressure applications (above 15 psig). For high-pressure applications involving multiple steam boilers with manholes that are connected to a common steam main, the steam connection from each boiler must be fitted with two stop valves. The first valve must be automatic and the second should be outside-screw-and-yoke (OS&Y).

How do they prevent backflow?
Non-return valves are flow sensitive, and rely on the steam flow to open and close. The internal disc opens and allows the flow of steam through the valve. The disc will begin to close as forward steam flow decreases or is reversed, depending on the design.

As you can see, non-return valves are critical for any steam boiler system, temporary or permanent. Be sure to check with your temporary equipment supplier to ensure that they include an NRV with their boiler rental package.
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