ADF pressure box

Our customer had to put in place cabins allowing him to carry out pressure tests of Anti Deflagrant (ADF) electric housing, either in series or in development, allowing him to ensure compliance with the current standards and standard test procedures.

Montanier provided a positive response, and designed a solution to allow INERIS to perform its tests in accordance with the standard and repeatedly, with:

• 1 high and medium pressure technical skid.
• 1 equipped test cabin.
• 1 test control screen with recording.

During this design, Montanier studied the current standards, and technically transcribed their strict application in the equipment.

Description of the equipment realized:

Installation of a water supercharger group with an adjustable pressure of 2 to 60 bar and a water flow of 8 m3/H. max.

The new HP group allows from a touch screen control box, placed next to the front door of the test room, using two water suppressor pumps, to perform the different tests.

A first centrifugal pump performs tests of 2 to 10 bar at a flow rate of 8m3 / H, the second high pressure pump performs tests of 10 to 60 bar at a maximum flow rate of 8m3/H as well.

A fault information stops the cycle in case of non-maintaining pressure at the scheduled time.

Mode of operation:

After connecting the equipment to be tested in the test cab, the operator selects the test mode on the touch screen:

Pump I – 2 to 10 bar pressure, or Pump II – 10 to 60 bar pressure

It can then program the test pressure and duration.

The test cycle shall be conducted with a slow start slope followed by a maintenance at the test pressure during the scheduled time, followed by a decompression for its shutdown.

A USB port on the front of the case allows the editing of the test parameters: date, time, pressure requested, pressure and duration obtained.

Operating principle:

Pressure control is provided by an analogue pressure sensor via communication (RS232) with the automatic. The speed of the electric motor of the HP pump is controlled by an electronic variable frequency (0 to 50 hz).

An electric by-pass valve (4/20 mA) provides proportional discharge in the buffer tank, depending on the pressure required and the leakage volumes required for the test.