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Monthly Archives: October 2019

 

Pressure atomization depends on the oil pressure inside the nozzle tip to spray a fine mist of oil, very similar to a Windex spray bottle. The micronized oil droplets are flung into the burner head, where they are thoroughly mixed with the combustion air and ignited. As mentioned above, the pressure at the oil nozzle is the key factor in the atomization process; therefore, your oil pump and pressure regulator are the key components in this system. The pump needs to be able to meet the gallons per hour (gph) requirement for the burner/boiler to meet their load capacity. The pressure regulator is set in accordance to the firing rate which is normally between 100-300 (psi). The turndown ratio for a pressure atomizing burner is normally only 3:1 or 4:1.

However, Preferred has just designed and shipped our first high turndown, 6:1 guaranteed, pressure atomized API-AF burners.

These API-AF burners are UL listed for No. 2 oil firing, utilizing pressure atomization. We demonstrated a turndown of 8:1 on pressure atomized oil firing to the UL inspector, extending the normal turndown ratio which is usually only 3:1 or 4:1

 

NEW PRODUCT ALERT!

Background: In the past, using anti siphon valves between the day tank and a generator has been discouraged due to the low vacuum capability of generator pumps. A generator fuel oil pump may only be able to pull 5 in. Hg. In addition, there is a filter installed between the day tank and the generator pump that takes a 2-3” Hg pressure drop. This means that only 2” Hg could be available to open an anti-siphon valve, which poses a problem for most designs. Engineers have addressed the need to prevent siphoning from a day tank by installing a solenoid valve that opens when the generator pump turns on. However, this solenoid needs to be wired and is dependent on the controls functioning properly.

Solution: Now, Preferred has a better solution! We now have an anti-siphon valve that will open with only 2” Hg of suction available, and it is designed for application between the day tank and the generator pump. In addition, this Low Vacuum Anti Siphon Valve is UL Listed. For diesel handling components, it is important to ensure the valves one is purchasing are listed by a an agency such as UL as it ensures compliance to a standard and that the product has been independently evaluated. This Low Vacuum Anti Siphon Valve is available in ½” up to 2” NPT.

 

Experts from Preferred Utilities help them identify their problem, and then get it solved.

The Block Island School in Rhode Island has been considering some major upgrades in 2019, and although they’ve hit a couple of snags along the way, Preferred Utilities Manufacturing was able to help them solve a heating oil problem that threatened to stymie their whole project.

Back in March, school staff discovered a troubling heating oil spill that needed addressing. The heating fuel spilled out of a vent pipe to the school’s roof and then onto the ground below, near the playground behind the school’s south wing.

In a recent article in the Block Island Times, Sam Bird (the town’s facilities manager) said that it was not an easy diagnosis. The culprit, he and the representatives from Preferred realized, was a check valve in the fuel supply piping that did not open to send the oil back to the main tank after an electronic control unit failed. 

“The valve had not opened, or had not had a reason to open, for years,” Bird said. With the valve stuck shut, the pump still going, and the return line closed off, the oil had nowhere else to go except out the roof vent. After a few minutes, the valve opened and the fuel flowed back to its tank, and no more oil spilled from the vent. To fix it, Preferred recommended that the school replace the electronic controls on the pumps and valves that supply fuel oil to the heating system. The new system will bypass the day tanks with new piping to create a closed system, preventing the same kind of spill from recurring

After the installation, Preferred will return to start the new fuel supply system and train town or school personnel to operate it.

In addition to addressing this fuel oil problem, the school’s operations staff also had the site tested for asbestos, and the results were negative. So they are good to go with their eagerly awaited renovation project!

Preferred is happy to have the opportunity to work with schools like the Block Island School to help them solve pressing issues in their physical plants. With winter weather looming, is your school or college looking at spending too much on heating?

Call us, and we’ll look for ways to increase your efficiency and save you money!

 

October is National Cyber Security Awareness Month. According to a study by the University of Maryland, there is a hacking attempt every 39 seconds. And, the average cost of a data breach in 2020 will exceed $150 million.

We live in a connected world. These connections allow for a pace of commerce and communication previously unimaginable.

As everything becomes more connected, threats to the cyber security of commercial facilities and industrial equipment grow every day.

Traditionally, when working with operationally sensitive equipment such as HMI/SCADA Systems, the established practice has been to “Air-Gap” your equipment and prevent any access from the outside world. Globalization, regulations, & advanced data analysis techniques have made this practice obsolete and costly to your bottom line. Plants that choose to be “Air-Gapped” lose out on new innovations that allow for increased oversight and efficiency optimization to plant systems.

Now, you can connect to your facility and equipment from anywhere without compromising the security of your operations.

The Preferred Cloud Remote Monitoring Platform offers three levels of encrypted, secure, and continuous analytics on your equipment, while recommending cost saving and preventative maintenance options to reduce downtime and emergency service.