Boiler Blog | Nationwide Boiler Inc.

Nationwide Boiler news and events, industry updates, technical information, and more. You hear it first on The Nationwide Boiler Blog!

Reconditioned Package Watertube Boiler Headed South

P1010648

This 75,000 lb/hr Nebraska package watertube boiler left Fremont, CA today and is headed to it's new home in the Southern United States. We are happy to serve a variety of industries across the country and beyond. Bon voyage!

Be sure to check out our complete list of Nationwide Boiler's new and reconditioned boilers for sale.

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Not Just Nationwide: Business In Focus Magazine

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Nationwide Boiler is featured in this month's issue of Business In Focus Magazine. Marketing Manager, Chelsey Ryker, was interviewed for an in-depth look at the company, our history, memorable projects, and what's in store for our future.

Big thanks to Nationwide Boiler representatives, Bailey Boiler and Combustion Systems, Inc. for supporting us and placing an ad in the issue!

Check out the full article here: https://goo.gl/yASzq3
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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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9/11 - To Honor and Remember

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In remembrance of all whom we lost on September 11, 2001. We will never forget.
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