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Above Ground Tanks > Safety and Service Accessories

All tanks are supplied complete with safety and service accessories defined in detail by the UNI EN 14570/2014 standard. The accessories, which are indispensable for the correct operation of the LPG distribution system, are installed directly on the tank by the manufacturer. The technical characteristics of the accessories are part of the documentation attached to the identification booklet that accompanies each individual tank.

A service unit is mounted on the tank to meet various operational and safety needs.

It is presented in one block and consists of the following elements:

A. Control pressure gauge
B. Flange for sample pressure gauge
C. Gas phase withdrawal connection
D. Manometer shut-off tap
E. Fixed draft system
F. Gas phase shut-off hand wheel.

A spring type safety valve is mounted on the tank, coupled with a subvalve (model, type and validity date are listed in the registration booklet).
The purpose of the safety valve is to ensure that the maximum operating pressure for which the tank was designed and manufactured is not exceeded for whatever reason. Checking the valve (date of validity, model and calibration) is the responsibility of the installer when installing the tank.The owner and/or user is responsible for complying with the requirement to change or calibrate the valve every two years.
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The tank has an attachment, with a suction pipe that goes all the way down to the bottom of the tank, on which is placed a valve for the withdrawal of gas in the liquid phase.
The use of such a valve is solely the responsibility of the specialized personnel of the gas distribution company. Any tampering, beyond the normal operation of the system, is extremely dangerous and must be avoided.

The level indicator provides the percentage in liquid phase contained within the tank at all times. The level should be checked periodically to determine the amount of product stored. During refueling, the level indicator must be kept under control by the operator of the gas distribution company, the level must not exceed the maximum value of 80 percent for above-ground tanks and 85 percent for underground tanks.
The user should limit himself only to checking the level and under no circumstances should he intervene on the instrument, especially on the tightening screws.

An automatic double shut-off valve is installed on the tank on a 1″ ¼ NPT connection for the purpose of LPG refueling.
On the upper side, the valve has a thread suitable for connecting the transfer machine
At the bottom, there is a shutter in the normally closed position.Upon refueling, the pressure exerted by the transfer pump of the tank truck causes this shutter to open. At the end of refueling, as the thrust of the tank truck fails, the sealing plug returns to its seat, ensuring that the valve closes.The use of such a valve is restricted to refueling personnel only.