2" x 1-1/4" Ventalarm Tank Fill Signal

Scully Ventalarm® Tank Fill Signal – Technical Product Information

The Scully 00215-VS521 Ventalarm® Tank Fill Signal is a mechanical overfill indication device designed for use in aboveground and underground storage tank applications. Engineered to provide audible feedback during liquid transfer operations, the Ventalarm® system produces a continuous whistle while the tank is filling, automatically silencing once the liquid level reaches the calibrated vent tube height. Constructed for long-term reliability, the unit offers precision-machined components and corrosion-resistant materials to ensure consistent performance across a wide range of petroleum, chemical, and industrial fluid systems.

Technical Specifications

• Product Code: 00215-VS521
• Manufacturer: Scully Signal Company
• Product Type: Ventalarm® Tank Fill Signal
• Connection Size: 2" x 1-1/4"
• Construction: Machined Metal Body with Corrosion-Resistant Components
• Operation: Mechanical Audible Whistle (No Electrical Power Required)
• Function: Emits continuous audible signal during fill operation; signal ceases when product reaches full level
• Calibration: Factory-calibrated vent stem; may be field-trimmed to accommodate flat or horizontal tank configurations
• Screen Assembly: Patented protective screen prevents obstruction from scale, debris, or insects
• Application: Fuel oil, lubricant, or chemical storage tanks requiring overfill indication
• Compatibility: Suitable for single-wall and double-wall tank systems
• Installation: Threaded connection for direct vent pipe mounting; requires unobstructed airflow to vent outlet
• Maintenance: Minimal; designed for service life equal to or exceeding tank lifespan under normal conditions

Professional Summary

The Scully 00215-VS521 Ventalarm® provides mechanical overfill protection and operational assurance during tank filling operations. By utilizing a precision air displacement whistle system, the device gives immediate audible indication of fill status without requiring electrical instrumentation. Its durable, low-maintenance design minimizes risk of overfill, tank rupture, or spillage while improving delivery efficiency and operator safety. The Ventalarm® line has established industry reliability standards through decades of proven service life in fuel, industrial, and chemical storage applications.