Description
Duplex Fuel Loading/Unloading Skid provides fully redundant, metered fuel transfer for both tanker truck unloading (fuel receipt into storage) and loading (fuel dispatch from storage) operations. Two independent self-priming positive displacement pumps operate in lead/lag configuration — the lead pump handles normal operations while the lag pump starts automatically on pump fault or demand surge, ensuring continuous throughput. A dual-purpose inlet manifold with quick-disconnect truck couplings, multi-stage filtration, and a custody-transfer-grade flow meter form the core of the process train. Static grounding verification, emergency shutdown, and a bunded containment sump ensure compliance with safety requirements for handling Class I flammable petroleum products. All components are factory-assembled and pressure tested prior to despatch.
Features
Pump & Mechanical
- Dual self-priming positive displacement gear pumps — lead and lag configuration
- Automatic lead/lag pump changeover on pump fault or excess demand
- Manual pump selection override for maintenance and testing
- Dual-purpose inlet manifold with hose connections and quick-disconnect couplings for tanker truck interface
- Dedicated inlet and outlet isolation valves, and spring check valve per pump
- Duplex basket strainer with differential pressure indicator for filter loading monitoring
- Bypass pressure relief valve per pump — protects against blocked-discharge overpressure
- Flexible hose connections to reduce vibration transmission
- Inlet vacuum gauge and outlet pressure gauge per pump, with isolation hand valves
Metering & Filtration
- Turbine or positive displacement flow meter for accurate volume measurement (±0.5% typical)
- Resettable batch totaliser and non-resettable cumulative totaliser
- 10–30 micron coalescing filter with water separator to prevent tank contamination
- Differential pressure indicator across filter for clog monitoring
- Ticket printer connection for delivery documentation
- Optional mass flow meter for custody transfer grade accuracy
Safety & Containment
- Static grounding / earthing clamp and bonding cable for tanker truck connection
- Grounding verification interlock — prevents pump start until truck is earthed
- Emergency stop (E-stop) button at skid and remote locations
- High-pressure cutout with manual reset and red pilot light
- Low-pressure cutout with override timer and manual reset
- Overfill protection output for storage tank integration
- Leak detection sensor in containment sump
- Structural steel skid with fully bunded drip tray and drain point
- Hot-dip galvanised or epoxy powder-coated skid finish
- Explosion-proof electrical components throughout (Class I, Div 1/2)
Control & Electrical
- Integrated NEMA 4X control panel with door-interlocked disconnect switch
- Individual HOA (Hand/Off/Auto) selector and motor starter with thermal overload relay per pump
- Pump running and fault indicator lights per pump
- Automatic start/stop via external level signal (float switch or 4–20mA)
- Running time meters per pump for maintenance scheduling
- High/low pressure alarm signal outputs for BMS/SCADA integration
- No-flow / loss-of-flow alarm
- All wiring terminated to clearly labelled terminal block for site connection
Applications
- High-volume tanker truck unloading to bulk diesel and fuel oil storage
- Bulk fuel loading from storage to tanker trucks for dispatch
- Mission-critical data centre, hospital, and power plant fuel receipt
- Mining and construction site fuel receipt and distribution
- Fuel distribution terminals and bulk fuel depots
- Airport refuelling facility fuel receipt and dispatch
