4 Inch Anodized Aluminum Pneumatic Bottom Shut-Off Valve for Tank Loading and Unloading

4 Inch Anodized Aluminum Pneumatic Bottom Shut-Off Valve for Tank Loading and Unloading

The HB804 Series Pneumatic Bottom Valve is a precision-engineered safety device designed for fuel and light chemical storage tanks, providing rapid and reliable shut-off during loading and unloading operations. Unlike conventional valves, this series incorporates a specialized cutting groove in the valve body. In the event of extreme mechanical impact, the outer body breaks along the groove while the internal valve disc maintains a complete seal, effectively preventing fuel or oil leakage and protecting the integrity of the tank.

Constructed from anodized aluminum, the HB804 valve ensures exceptional resistance to corrosion while remaining lightweight and durable. The valves operate pneumatically, allowing precise control of fluid flow and providing reliable performance in demanding industrial environments. Optional sealing gaskets in Viton or Buna-N further enhance chemical resistance and ensure leak-free operation.

Globally, this series is recognized under multiple names, reflecting regional and industry terminology: Pneumatic Emergency Shut-Off Valve, Pneumatic Bottom Valve, Tank Loading Safety Valve, Anodized Aluminum Shut-Off Coupler, Fuel Depot Pneumatic Valve, EN13308 Pneumatic Valve, Pneumatic Anti-Leak Bottom Valve, High-Flow Emergency Shutoff Valve. These names all emphasize the valve’s core advantages: safety, reliability, and efficient fluid handling.

Key Features
Compliant with EN 13308: Meets European standards for tank service equipment.
Pneumatic operation: Provides responsive control for loading and unloading, reducing the risk of spillage.
Optimized internal design: Ensures minimal leakage while supporting high flow rates up to 2500 L/min.
Durable anodized aluminum body: Resistant to corrosion and chemical wear.
Sealing flexibility: Buna-N or Viton gaskets available for both tank-side and pipe-side interfaces.
Impact protection: Cutting groove design ensures external damage does not compromise internal tank sealing.
Standard air inlet: 1/8” GAS for pneumatic connection.

Ordering and Compatibility
The HB804CQ-100R model features a 4-inch nominal size, square flange on the pipe side and round flange on the tank side, designed for light fuels such as gasoline and diesel. Optional accessories include tank-side flanges with male or female bolts, pipe-side square flanges, and replacement gaskets to suit various installation requirements. Custom designs are also available.

Typical Applications
The HB804 pneumatic bottom valve is widely used in fuel depot tank operations, tanker truck loading/unloading, chemical storage tank safety systems, petroleum distribution stations, and high-flow industrial liquid handling platforms.