EMCO A1100 Guardian Overfill Prevention Valve – 2-Stage, ATEX Certified, 457mm Length

The Emco Wheaton A1100 Guardian Overfill Prevention Valve delivers trusted two-stage protection for underground fuel storage systems. Designed for use in dual point and coaxial drop tubes, this valve ensures precise overfill shut-off while maintaining flow efficiency and gauging access.

With an internal vertical float system, the A1100 prevents float damage during installation and ensures smooth operation free from tank wall interference. The automatic spring-loaded poppet and integrated stick diverter retract from the flow path when inactive, allowing unobstructed manual gauging.

Ideal for gravity-fed installations, this robust unit supports straightforward retrofit or new installs and is compatible with all standard fuels. Built from corrosion-resistant aluminium with HDPE floats and Viton® seals, it is fully ATEX Certified (FTZU98EX0733) for safe operation in hazardous environments.

Key Features

• Dual-stage automatic shut-off for precise overfill protection
• Internal float design eliminates float entrapment and damage risk
• Stick diverter enables unrestricted tank gauging at any level
• Spring-loaded poppet retracts when not in operation
• Auto-relatch function prevents accidental early shut-off
• Protective float retainer ensures safety during transport and install
• Drain bleed valve helps clear hoses post-fill, reducing delays
• Compatible with both coaxial and dual-point drop tubes
• ATEX Certified (FTZU98EX0733) for hazardous area use

Technical Specifications

• Valve Type: 2-stage overfill prevention
• Installation: Drop tube compatible – dual point and coaxial systems
• Length: 457 mm
• Diameter: 95.5 mm
• Weight: 2.36 kg
• Materials:
  • Body – Aluminium
  • Floats – High-Density Polyethylene (HDPE)
  • Seals – Viton® (FKM)
• Fuel Compatibility: Suitable for all standard fuels, including E85 and B100 variants
• Certification: ATEX FTZU98EX0733