The vast majority of connections in pneumatics are made using fittings with BSP parallel threads and an O-ring seal. Unlike sealing by contact between threads, they do not require Teflon thread sealant, which could be a source of contamination for the pneumatic system. The exception is joining uneven (curved) surfaces where an O-ring may not provide sufficient leak-tightness.
Tapered or parallel thread fittings?
Damian2023-04-24T12:32:41+02:00