ANA safety installation

Emptying devices with attention button and emergency stop (ANA safety installation) are manually operated, automatically shutting safety installations on tank trucks which are able to prevent the leakage of larger quantities of water-contaminating liquids during the container-filling process. 

In the case of filling containers without an ANA safety installation, the volume of the collecting tank has to be of appropriate size in order to fulfill the water legislation provisions. There is no need to heed this requirement if the filling operations are monitored by an ANA safety Installation (TRwS 785 –  Determination of Retention). Via the ANA safety installation the leakage quantity is reliably reduced by a maximum drainage time of 40 seconds and the required retention volume is decreased considerably.

Use of an ANA safety installation is a legally prescribed requirement when handling flammable liquids (Technical Regulations for Combustible Liquids (TRbF) 30 – Filling Locations).

The ANA safety installation consists of a blocking device (valve) which shuts off automatically, a control device as well as an actuating device (attention and emergency stop button).

According to VdTÜV-Code of Practice 953 the ANA safety installation is to have the effect of maintaining the constant attention of the operator (e.g. of the truck driver) during the decanting process. For this purpose the ANA safety installation must have the following safety functions or comply with the corresponding conditions:

• Attention button to be used at regular intervals.
• Either failure to use the attention button or consistent
  use of it will cause an interruption in the
  emptying process.
• Emergency button for immediate interruption of the
  emptying process.
• Local restriction of the operator‘s scope for movement
  to a maximum of 12 m from the tank truck.