Krampitz Safety Features Part 7: Overfill protection with fuel stop system

When filling gas stations, it happens again and again that tanks are overfilled and overflow. This is mainly due to a missing overfill protection system or one that does not work reliably enough.

Overflowing cannot happen at Krampitz gas stations, because our gas stations are optionally equipped with the best overfill protection in the industry: A combination of automatic switch-off of the transfer pump and additional shut-off of the fuel supply line with a motorized ball valve. So a double protection against overfilling.

construction mechanic Clemens Nitz explains how the Krampitz overfill protection system works and how the components interact.

"This is our overfill protection system with an integrated motorized ball valve. The overfill protection is screwed into the roof and sits in the tank chamber. It runs at an operating temperature of 45 degrees. It has a thermistor sensor in here. That's always heated up. When the medium, which is filled in at average room temperature, touches this sensor, the resistance rises in here and the overfill protection sends a signal to the evaluation unit. This reacts immediately and tells the motor ball valve to close."

Let's try that right away.

"The overfill protection gets contact with the medium and gives a signal to the evaluation unit. It sends the signal to the motor ball valve, which closes and interrupts the filling process."

When the PTC thermistor is wetted with medium, the sensor is cooled down and the electrical resistance value increases.

The filling line is closed and overfilling of the tank is ruled out.
In addition to closing the filling line, however, the transfer pump is also automatically switched off, either in our gas station or in the tank truck.

The tanker pump is switched off via a signal cable, which the tanker driver connects to the overfill protection socket. If the overfill protection triggers the signal, the pump stops and the filling process is complete. This system is extremely robust and safe, and has been installed millions of times in tank farms worldwide.

We also show here once in a test how the shutdown works.

"This is the overfill protection with the tank truck plug. The tanker plug has a resistor. And as soon as the overfill protection comes into contact with medium, the resistance goes to zero and the tanker is switched off."

Switching off the transfer pump via the signal plug! and shutting off the filling line via motorized ball valve! - this is double protection against overfilling and makes Krampitz gas stations so safe.

Krampitz tank system. Cubically good.
www.krampitz.de