Double-walled tank

for fuelfor dieselfitting

Overview
A generator fuel tank stores diesel or light fuel oil to keep standby generators running during power outages. Common configurations include sub-base (belly) tanks that mount under the genset, generator day tanks that feed the engine, and bulk tanks for centralised fuel supply.

Product Types

• Sub-base / belly tanks (integral generator base tank)
• Generator day tanks (engine-mounted supply)
• Bulk diesel storage tanks
• Fuel-polishing and transfer-ready units

Design & Delivery
Tanks are built to order and sized to the generator rating and required autonomy. Available as single-wall or double-wall (self-bunded) units for indoor plant rooms or outdoor sites. Delivered with required fittings, mechanical contents gauge, level transmitters and alarms for direct connection to generator fuel systems.

Key Features & Advantages

• Double-wall (self-bunded) option — eliminates need for separate civil bund
• Interstitial leak detection on double-wall tanks for early warning
• Steel construction compliant with EN 12285-2 / UL-142
• Level transmitters with high-high and low-low alarms
• BMS-ready volt-free contacts and Modbus signalling
• Sized precisely to generator kVA and required autonomy
• Full-drainage, easy-clean tank design for maintenance
• Corrosion-protected steel with ISO 12944 (C4 / C5-M) coating options
• Supplied with gauges, alarms and fittings ready to connect
• Suitable for indoor plant rooms or outdoor installations
• Lower installed cost compared with a concrete bund for self-bunded designs

Capacities & Configurations
Standard generator day tanks typically range from 200 to 5,000 litres; base and bulk tanks are manufactured to any project-required capacity. Net volume is calculated from fuel consumption (L/h) × required autonomy (h) with margins for expansion and fill setpoints.

Available Tank Configurations

• Single-wall or Double-wall (self-bunded)
• Indoor or Outdoor installation
• Horizontal, Vertical or Sub-base (belly)

Construction, Coating & Testing
Fabricated from certified structural steel plate with fully welded, pressure-tested seams. Wall thickness selected for capacity and installation. Internal and external surfaces shot-blasted and coated to ISO 12944 (C4 or C5-M) matched to exposure. Each tank is pressure- and leak-tested before dispatch and fitted with labelling and warning signs as requested.

Instrumentation & Leak Detection
Supplied with level instrumentation including level transmitter and high-high / low-low switches for overfill and pre-alarm; mechanical contents gauge for local reading; interstitial monitoring on double-wall tanks to detect primary containment breaches before fuel escape.

Applications
Neftgen generator fuel tanks are engineered for mission-critical standby power where fuel-supply reliability is essential: data centres, hospitals, airports, ports, telecom sites and industrial plants. Tanks are sized for commercial building runtimes and extended autonomies (typically up to 24–96 hours for high-availability data centres).

Accessories & Equipment
Typical accessories include transfer sets, fuel-polishing systems, level instrumentation, gauges, alarms and leak-detection systems integrated with control and BMS signalling.

Technical specifications

• Construction materials: certified structural steel plate, fully welded seams, pressure-tested
• Coating: shot-blasted and coated to ISO 12944 (C4 / C5-M) for indoor/outdoor use
• Standards: EN 12285-2, UL-142; designed to relevant NFPA standards where applicable
• Manufacturing quality: ISO 9001
• Containment: single-wall or double-wall (self-bunded) with monitored interstitial space
• Leak detection: continuous interstitial monitoring on double-wall tanks
• Level instrumentation: level transmitter plus high-high and low-low level switches; mechanical contents gauge
• Alarms & Signals: high-high, low-low alarms; volt-free contacts; Modbus outputs (BMS-ready)
• Capacities: day tanks 200–5,000 L standard; base/bulk tanks to project requirements
• Fuel types: diesel, gas oil, MGO, light fuel oil
• Installation types: indoor plant-room or outdoor site; horizontal, vertical or sub-base
• Design sizing: net volume = fuel consumption (L/h) × required autonomy (h) + expansion/fill margin
• Testing: pressure- and leak-tested prior to dispatch
• Drainage & maintenance: full drainage and easy-clean design
• Optional features: enhanced corrosion protection, customised painting/marking and bespoke structural designs as required