Points to consider when building your storage unit are:
Needs to have the appropriate fitting for accommodating a blown delivery from Balcas. This is a male 4 inch cam-lock fitting, serial number: A-400
Is the camlock fitting within driver's reach? Chest height is recommended.
Storage unit needs to be waterproof
Storage unit needs to be properly sealed to control dust and designed to reduce condensation.
Storage unit needs to be of sufficient strength to hold 4 tonnes of brites; it is unlikely that a stud wall construction will be strong enough. Balcas minimum delivery 3 tonnes
It is recommended that storage unit has a sight glass/inspection hatch to monitor volume and to indicate to customer when to re-order.
Balcas recommend that the intake pipe has no more than 2 soft bends
The delivery pipe on the storage unit must be made from metal and must be earthed. Static can build up on plastic piping and is a fire hazard.
Storage unit will need an exit port to allow the release of the delivery air and this port should be fitted with a filter to reduce dust exiting the storage silo.
It is recommended that your storage unit has a flexible rubber sheet hanging opposite the inlet pipe. This will stop pellet damage during delivery. It is essential that pellets are not blown against a wall or hard floor.
The floors of the storage unit should have a slope of at least 40° going towards the feed mechanism.
The inside of the storage unit needs to be free from electrical sockets, electrical switches, lights and electrical fittings. This is to prevent a dust explosion.
Storage should be lined with a suitable material (e.g. wood)