Choosing the Right Diesel Fuel Tank for Your Industrial Generator
When it comes to managing a commercial facility, ensuring your building’s critical systems are ready to go in any emergency is paramount. And, as any facility manager knows, a reliable industrial generator is key to keeping the lights on and operations steady during unexpected power outages. But that reliability also depends on one often-overlooked piece of equipment: the diesel fuel tank.
Let’s dive into the types of diesel fuel tanks available and explore which options might be best for your facility’s needs.
Diesel Fuel Sub-Base Tanks
Sub-base tanks are a popular choice for many commercial facilities because they’re compact and easy to install. Also called Belly Tanks, they are typically underneath the genset package and are used as the base for the unit. These tanks take up less real estate and serve as the foundation of the generator. The con for this type is if there is a problem with the tank, typically the whole generator needs to be moved to replace, or the tank is simply abandoned in place and another auxiliary tank is plumbed in and placed somewhere else on the property. Sub-Base Tanks range in size from small capacities that can run a generator for a few hours to larger models that can power it for up to 72 hours.
- Key Features:
- Space-Saving: Since they sit beneath the generator, sub-base tanks don’t take up extra floor space, which is a huge plus for facilities where space is at a premium.
- Simple Installation: These tanks often come integrated with the generator package, reducing setup costs and complexities
- Capacity Constraints: While convenient, sub-base tanks can have limited capacity, so they’re best suited for facilities with backup needs lasting just a few hours or where refueling is readily available.
Diesel Fuel Main Tanks
This tank can be utilized for multiple pieces of equipment and typically has a large amount of fuel. It can be above-ground or underground. Fuel can directly feed a piece of equipment, or fuel can be drawn from the main tank to a day tank, which would then feed that equipment. Maintenance of main tanks can be more involved, especially for underground units, which may require specialized handling and regulatory compliance. We break down the features of above-ground and underground Main Tanks below.
Above-Ground Storage Tanks (ASTs)
If your facility requires a more robust fuel storage solution, an above-ground storage tank (AST) could be ideal. ASTs are larger, standalone tanks typically installed outdoors and connected to the generator via a fuel line.
- Key Features:
- High Capacity: These tanks can hold significant fuel quantities—sometimes enough to keep the generator running for days.
- Enhanced Safety: ASTs are often equipped with safety features like double-wall containment and leak detection systems, protecting against environmental hazards.
- Regular Inspections Required: Due to their large capacity, ASTs are subject to regulations that mandate regular maintenance and inspections, which facility managers should factor into the upkeep budget.
Underground Storage Tanks (USTs)
If you’re working with limited outdoor space or want a more discrete fuel storage option, underground storage tanks (USTs) are worth considering. These tanks are installed below ground, keeping them out of sight and leaving valuable surface space free.
- Key Features:
- Space Efficiency: USTs take up minimal surface area, preserving the grounds around your building.
- Long-Term Investment: These tanks are built to last and offer high capacities, making them suitable for facilities with high power demands.
- Compliance & Safety Requirements: USTs often have strict environmental compliance guidelines due to their potential risk to groundwater. They require proper containment, leak monitoring, and regular inspections to keep them safe and environmentally friendly.
Other Diesel Fuel Tank Options
A diesel fuel Day Tank provides fuel from the main tank to a specific generator or other piece of equipment. It also aids in regulating the amount of fuel drawn from the main tank, ensuring your generator runs continuously during power outages while also preventing overconsumption of the main tank if multiple units are connected to it.
A Temporary Tank is used during the interim of a repair or replacement of the equipment’s permanent tank. It is only used to keep the equipment online while work is being performed. Since the tank is only temporary, there may need to be additional monitoring and fueling processes during the repair. Temporary tanks are typically much smaller than the original.
Fire Pump Tanks are typically connected directly to the fire pump. They are also mounted above the feed of the engine to assist in fuel priming by utilizing gravity to help ensure the unit will have a good prime to ensure starting the unit during an emergency. Their installation requires more safety protocols due to their role in fire life safety.
Double-Wall Tanks
For facilities prioritizing environmental safety, double-wall tanks (available in both above-ground and underground options) are a smart choice. These tanks have two layers of steel, creating a barrier that helps contain leaks if the primary tank is damaged.
Duthie Power’s Safety and Quality Assurance Manager Johnny Bradford elaborates, “All storage diesel tanks should be double walled and are usually UL listed. Each tank must be inspected daily for leaks or signs of corrosion or wear and is supposed to be included in the Building’s SPCC Plan (Spill Prevention Containment and Correction Plan). Proper training should also be administered annually on what to do should a release occur. Finally, the facility manager should ensure proper signage is posted along with installing emergency vents, shut-off valves, and or switches to prevent spills.”
- Key Features:
- Secondary Containment: If the inner tank fails, the outer wall acts as an added layer of protection, reducing environmental impact.
- Leak Detection: Many double-wall tanks come with advanced monitoring systems that can alert you if a leak is detected between the walls.
- High-Cost, High-Reward: While they can be pricier than single-wall tanks, double-wall tanks offer peace of mind and help facility managers stay compliant with environmental regulations.
Choosing the Right Tank: Factors to Consider
When it comes down to selecting the best tank for your facility, here are a few things to keep in mind:
- Fuel Storage Duration: How long do you anticipate needing backup power? For short-term outages, sub-base tanks might be sufficient. For longer durations, an AST or UST might be a better fit.
- Space Availability: Consider whether your facility has room for an AST or if an underground setup makes more sense.
- Regulatory Requirements: Certain tank types come with more rigorous inspection and compliance requirements, especially for ASTs and USTs. Be sure to factor in these needs before deciding on a tank type.
- Environmental Concerns: Double-wall tanks provide an extra layer of environmental protection, making them a sound choice for facilities near sensitive areas or those with strict environmental regulations.
The Choice is Yours
Choosing the right diesel fuel tank can make a big difference in the effectiveness of your facility’s backup power plan. By evaluating the tank types available and understanding the specific needs of your building, you’ll be well-equipped to keep the lights on and operations running smoothly no matter what comes your way.
For more information on generator diesel storage tanks, request a quote or give us a call at 1-800-899-3931.
