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The Scully Signal 202 Ventalarm Fill Signal is a trusted overfill prevention device designed for use with both above ground and below ground storage tanks. Tank delivery professionals and fuel distributors rely on this device to prevent costly spills, product waste, and environmental hazards during tank filling operations. The 202 features a 1-1/2 inches male inlet connection and a 1-1/2 inches female outlet connection, making it compatible with standard vent pipe installations commonly found in petroleum, heating oil, and chemical storage tank systems.
The operating principle is straightforward and reliable. During a fill, air displaced from the tank passes through the Ventalarm, causing the calibrated whistle stem to produce an audible sound. When the liquid level inside the tank reaches the safe capacity point, the rising product contacts the signal and the whistle stops. The driver hears the silence and knows to stop delivery immediately. This simple audio alert system eliminates the guesswork from bulk liquid delivery and dramatically reduces the risk of tank overflow, ground contamination, and regulatory fines.
The 202 is built with a patented internal screen that keeps the whistle chamber free of pipe scale, debris, and insects. This protection ensures consistent, reliable signal performance over the life of the installation. The calibrated whistle stem is also designed to accommodate product expansion, accounting for thermal changes common with petroleum-based fuels. For installations involving flat-style tanks, the whistle stem can be cut to the appropriate length, adding installation flexibility for a variety of tank configurations. This device improves delivery efficiency, helps drivers work faster and with greater confidence, and reduces customer complaints tied to spill cleanup and odor.
The Scully Signal 202 Ventalarm Fill Signal provides a simple, reliable audio overfill alert for storage tank delivery operations. It reduces spills, improves efficiency, and installs directly into standard 1-1/2 inches vent pipe connections.
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