Following a detailed daily maintenance schedule will ensure your equipment is always in top shape.
Often blast pots decide that the best place to stop working is 200 km from civilisation and all that you need is a $50 part to get your machine up and working again. You probably have four workers onsite and perfect weather to get some blasting done.
Your predicament is typically caused by a regular maintenance schedule not being followed, with nobody realising that the hand-hole gasket was leaking air.
By following a regular and disciplined maintenance schedule like the one below, you will have less catastrophic events out in the field.
Note: The below schedule is the minimum requirements for inspection and maintenance; however, the equipment should be inspected and serviced immediately if abnormal operation is detected.