Advanced Overfill Prevention Valve (OPV) for Diesel Tanks

This Overfill Prevention Valve ( $\text{OPV}$ ) is a highly reliable, mechanical safety device specifically designed for underground storage tanks (UST) holding diesel fuel. Its unique, single-moving-part design ensures safe, automatic fuel delivery shut-off while virtually eliminating line shock during gravity drops, protecting the entire piping system from stress.

By preventing spills, the $\text{OPV}$ significantly reduces the risk of fire, contamination, and expensive environmental clean-up.

⭐ Key Operational Features

Automatic Shut-Off: The valve operates completely automatically, relying on a float mechanism to detect the fuel level. It shuts off gradually when the fuel reaches a pre-determined level, preventing overfills and spillage.
Zero Line Shock Technology: Featuring only one moving part, this unique design prevents sudden hydraulic surges. This gradual shut-off is crucial for gravity drops (where the fuel is delivered by gravity from the transport truck), reducing stress on the system and associated maintenance costs.
No Minimum Flow Rate Required: The shut-off mechanism works reliably regardless of the speed of fuel delivery.
Manual Gauging: The design enables manual gauging of the tank even with the $\text{OPV}$ installed.
Easy Retrofitting: The valve can be easily retro-fitted into existing tanks and allows for easy field installation without breaking ground (i.e., minimal excavation is needed).

🔩 Construction and Material

The $\text{OPV}$ is built with durable, corrosion-resistant materials suitable for petroleum products:

Component	Material	Function
Body	Cast Aluminum	Lightweight, corrosion-resistant housing.
Moving Part	Stainless Steel Shaft, Aluminum Internal Components	Ensures durability and reliability in the fuel environment.
Float	Reinforced Closed Cell Float	Provides precise buoyancy for accurate level sensing.
Shutoff Mechanism	Spring Steel Pre-Trip Mechanism, Thrust Bearing, Teflon Washer	Components designed for smooth, shock-free operation and sealing.

🎯 Safety and Efficiency Benefits

Environmental Compliance: Meets regulatory requirements (e.g., $\text{EPA}$ , $\text{NFPA}$ ) for preventing hazardous overfills.
Faster Deliveries: The design incorporates less restriction, enabling faster, more efficient fuel deliveries.
System Integrity: By eliminating line shock, the valve protects the tank, pipes, and fittings from undue stress, prolonging the life of the entire $\text{UST}$ system.