Why does MBA install a pneumatic lock as a standard feature on the pressure blast cabinets?
Siphon blast machines stop blasting instantly when the blast pedal is released. Pressure blast machines will continue to blast when the blast pedal is released until all the pressure is vented from the pressure pot. The machines are equipped with safety door interlocks which shut off the pressurized air to the cabinet when the access door is opened. However, an operator or another person could still open the access door while the pressure nozzle is blasting and get a face full of abrasive. MBA pressure machines are equipped with pneumatic door locks that will not allow the access door(s) to be opened while there is still pressure in the pot. This standard safety feature is unique in the industry.
