Pneumatic transport systems represent the heart of any granular bulk material handling system throughout many...
Earth-Rite® FIBC system validates and monitors the resistance of Type C FIBC bags guaranteeing the static dissipative elements of the bag are capable of conducting electrostatic charges through the FIBC in compliance with IEC 61340-4-4 “Standard test methods for specific applications – Electrostatic classification of flexible intermediate bulk containers (FIBC)” and NFPA 77 “Recommended Practice on Static Electricity”.
The Earth-Rite FIBC system can be installed and set up to ensure that operators ground the bag before filling or emptying operations are started. During the bag filling / emptying process, the Earth-Rite FIBC system continuously monitors the resistance of the bag so that if it rises above the recommended upper monitoring resistance level*, this dangerous situation can be indicated to operators and the process halted, either manually or via the system’s pair of NO/NC volt free contacts.
This feature ensures the generation and accumulation of static charges on the bag is stopped eliminating the risk of an incendive electrostatic spark discharge.
To compensate for normal wear and tear on Type C bags it is important to ensure the bag maintains its ability to dissipate electrostatic charges. It is equally important to ensure the earthing connection between the bag and plant earth grounding point is functioning correctly.
Newson Gale can also provide the Earth-Rite FIBC configured to validate and monitor Type C bags that are designed to operate with an upper resistance level of 1 x 108 ohms (100 meg-ohm) or 1 x 107 ohms (10 meg-ohm).
Recommended upper monitoring resistance level:
- IEC 61340-4-4 state that the resistance through a Type C FIBC bag should not exceed 1 x 108 ohms (100 meg-ohm).
- NFPA 77, state that the resistance through a Type C FIBC bag should not exceed 1 x 107 ohms (10 meg-ohm).