Day Tank Manufacturer for Industrial Chemical Storage System
A Day Tank is a small-capacity storage tank designed to hold and supply a limited quantity of fuel, chemicals, water, or process liquids for short-term operational use. The end use of the product is usually a generator. The purpose of the day tank is to provide immediate product to the end user, where the supply otherwise would be influenced by product temperature, viscosity, and inadequate supply pressure. A day tank is used to hold and supply a limited quantity of liquid (such as fuel or chemicals) for short-term, daily consumption.
A day tank is typically installed near the equipment, such as generators, boilers, or process systems. To ensure a continuous and reliable supply of fluid without needing direct connection to the main storage tank at all times. It sits between bulk storage (large tanks, tank farms, or delivery trucks) and the point-of-use equipment to provide a reliable, steady feed, conditioning, and safety buffer.
Day Tank Details
| Parameter | Details |
| Material of Construction | Mild Steel (MS), Stainless Steel (SS), HDPE, FRP |
| Capacity Range | 50 Liters to 5,000 Liters (custom sizes available) |
| Shape | Cylindrical (Vertical/Horizontal), Rectangular |
| Wall Thickness | 3 mm to 10 mm (depends on material and capacity) |
| Design Type | Open top / Closed top |
| Fuel / Liquid Type | Diesel, Oil, Chemicals, Water |
| Operating Temperature | -10°C to 80°C (depends on material used) |
| Pressure Rating | Atmospheric (generally not designed for high pressure) |
| Level Control System | Float switch, level sensor, level gauge |
| Inlet Connection | Flanged or threaded connection |
| Outlet Connection | Bottom outlet with valve |
| Overflow Connection | Provided to prevent overfilling |
| Vent Pipe | Included for pressure balance |
| Pump Integration | Transfer pump or dosing pump (optional) |
| Filtration System | Optional fuel filter or strainer |
| Coating / Lining | Anti-corrosion coating or internal lining (for MS tanks) |
| Mounting Type | Skid-mounted / Floor-mounted |
| Stand / Support | MS frame or base support |
| Standards Compliance | As per ISO / ASTM / API standards |
| Safety Features | Level alarms, overflow protection, leak-proof design |
| Accessories | Level indicator, control panel, valves, piping, alarm system |
- Capacity & Sizing: Designed to hold approximately 24 hours of fuel, facilitating frequent fuel turnover, which reduces the risk of fuel degradation and contamination.
- Automation: Integrated with an Automatic Fuel System, comprising a transfer pump and a float switch that automatically triggers a fill cycle when the level drops, typically handling 10-15 minute cycles.
- Safety Mechanisms: Features include high/low-level alarms to prevent overfill or depletion, a fusible link valve for fire safety, and automatic shutoff valves.
- Filtration & Fuel Quality: Often includes built-in filters to ensure clean fuel reaches the engine, reducing engine maintenance.
- Monitoring & Control: Equipped with level gauges, control panels, and testing buttons for pumps and alarms.
- Compact Construction: Usually compact for space-efficient installation near the generator, reducing the need for long, vulnerable fuel lines.
- Materials: Constructed from durable materials, commonly steel (horizontal or vertical) for fuel tanks, or specialized thermoplastics for chemical applications.
1. Raw Material Inspection
- Verification of material grade (MS, SS, HDPE, FRP)
- Checking mechanical properties and chemical compatibility
- Ensures compliance with relevant standards (ISO/ASTM/API)
2. Visual Inspection
- Examination for surface defects, dents, cracks, or corrosion
- Inspection of weld joints, edges, and overall finishing quality
3. Dimensional Accuracy Test
- Measurement of thickness, diameter, height, and fittings placement
- Ensures the tank meets design specifications
4. Hydrostatic (Leak) Testing
- The tank is filled with water to check for leaks
- Confirms leak-proof construction and joint integrity
5. Pressure Testing (If Applicable)
- Conducted for tanks designed for slight internal pressure
- Ensures structural strength under operating conditions
6. Weld Quality Testing (For Metal Tanks)
- Non-Destructive Testing (NDT) methods like:
- Dye Penetrant Test (DPT)
- Ultrasonic Testing (UT)
- Ensures strong and defect-free welds
7. Coating & Lining Inspection
- Thickness and adhesion testing of internal/external coatings
- Ensures corrosion resistance, especially for MS tanks
8. Load & Structural Testing
- Evaluates the tank’s ability to withstand operational loads
- Includes support structure and skid strength checks
9. Functional Testing of Components
- Testing of level sensors, float switches, pumps, and alarms
- Ensures proper functioning of control systems
10. Overflow & Safety System Check
- Verification of overflow line, vent pipe, and emergency features
- Prevents overfilling and pressure build-up

Custom Product Manufacturing Available
If you are searching for customized product designs that meet your requirements, don’t worry. Petron Thermoplast also offers custom product manufacturing services to meet the unique needs of various industries. Work with our expert engineers to create custom designs suited for your application.
Application of Day Tank
Generator Sets
They are commonly used in backup power generators to ensure a consistent, clean fuel supply. They enable the transfer of fuel from a large, distant bulk tank to a smaller, local tank for immediate use in hospitals, data centers, and industrial facilities.
Boiler Systems
Day tanks provide a steady, local supply of oil to boilers in commercial buildings and industrial plants, improving efficiency and supporting automatic refill, often with built-in leak monitoring.
Industrial Fuel Handling
They are utilized in factories to manage daily fuel consumption for machines that run on diesel or heavy fuel oil, featuring transfer pumps and level controls to prevent overfills or dry runs.
Marine Fuel Systems
Used in ships and marine vessels, these tanks provide a reliable, intermediate supply of fuel to generators or engines.
Chemical Transfer
Beyond fuel, they are used to store and dispense a 24-hour supply of chemicals in industrial processes.
Why Choose Petron Thermoplast ?
Petron Thermoplast is known for precise manufacturing, quality materials, and adherence to standards. Working with a trusted manufacturer like Petron Thermoplast to ensures the quality is 100%. Day Tanks that deliver to consistent performance in demanding environments. With the experience in producing standard and custom designs, Petron Thermoplast provides solutions tailored to the needs of diverse industries worldwide.
Conclusion
A day tank is a vital component for the systems, required a reliable and continuous of short-term supply of the fuel and liquids. By storing the limited quantity to close the point. It ensures to smooth operation of the equipment to such as generators, boilers, and the industrial to processes without any interruption.
Day tanks are enhanced to the operational efficiency and reducing the dependency on the main storage tanks. They are Proper material selection and the quality testing to further ensure the safe and long-lasting performance. A day tank provides convenience, safety, and efficiency in liquid management, making it an essential part of modern industrial and commercial setups.
Frequently Asked Questions
A day tank is a small storage tank used to hold and supply fuel or liquid for short-term (daily) use, typically connected to equipment like generators or boilers.
Its main purpose is to ensure a continuous and reliable supply of fuel or liquid to equipment without directly relying on the main storage tank.
Day tanks are commonly used for:
- Diesel fuel
- Furnace oil
- Lubricating oil
- Water or certain chemicals
Capacity usually ranges from 50 liters to 5,000 liters, depending on the application and consumption requirements.
They are widely used in:
- Diesel generator systems
- Boiler fuel systems
- Industrial processing units
- Commercial buildings
Fuel or liquid is transferred from the main storage tank to the day tank. From there, it is supplied directly to the equipment, often using pumps and level control systems.
Common materials include:
- Mild Steel (MS)
- Stainless Steel (SS)
- HDPE
- FRP
Typical safety features include:
- Overflow protection
- Level indicators and alarms
- Vent pipes
- Leak-proof construction
Yes, day tanks can be designed for outdoor use with proper coating, lining, or UV-resistant materials.
- Regular cleaning
- Checking for leaks or corrosion
- Inspection of pumps, valves, and level systems
- Monitoring fuel quality
A day tank is for short-term, immediate use, while a storage tank is designed for bulk, long-term storage.
