Features

• Design flexibility - modular design permits multitude of anode configurations.
• Light weight - very easy to ship and handle.
• Simple to install - no field splices or weldments.

Design Compatibility

The Model AT is an impressed current anode specially designed for cathodic protection of above-ground storage tanks. It consists of a copper cored titanium flat wire coated with platinum or mixed metal oxide and attached to a #14 AWG HMW/PE insulated bus wire. The wire pair is surrounded by a flexible plastic mesh. Individual anodes are 50 ft. long and are easily connected in the field to form a hermetically sealed joint. This allows the design engineer to choose a layout which is best suited to the tank and its local environment.

Each component used in the Model AT has been field-proven in similar demanding applications; and therefore, it can be reliably operated up to 10 mA/ft for more than 50 years. Spiral layouts offer the most redundancy as well as uniform current output over the entire tank bottom. Alternatively, individual concentric rings permit varying current outputs where local conditions necessitate it. For any design configuration, the installation is quick and easy due to its light weight and flexibility.

Perhaps the most significant feature of the Model AT is its unique connector system. Each anode is supplied with a pin connector on one end and a socket connector on the opposite end which can be mated either to another anode section to form a string or to a power feed cable. Cables with the specially developed "tee" connector allow intermediate current feeds on long strings. These connectors are designed for underwater cable connections and are being used successfully on other EDI products in turbulent aqueous solutions. All connectors are factory made and sealed which means that there are no splices or weldments required in the field.

Connector Specifications

1. When connector halves are fully mated, points (A) will align.
2. Current output not to exceed 10 mA/ft.
3. Individual anodes may be interconnected to form strings of any desired length. Power feeds must be no more than 1,000 feet apart.
4. Current should be fed into anode strings from both ends. Longer strings should have additional intermediate feeds.
5. Assemble individual anodes into strings by pressing pin end fully into socket end. The joint can be made permanent by using any solvent cement suitable for use with CPVC.

Installation

Anodes can be interconnected to form either one continuous string or several discrete strings. Lead wires are to be connected to both ends of anode strings. The Tee End Lead Wire is used to provide intermediate feeds. Distance between power feeds must not exceed 1,000 feet on single wire anodes.

To ensure optimum anode performance, anode should be covered with calcined petroleum coke or fine sand. Make sure the material filters through the poly mesh and completely encapsulates the anode.