In a piston compressor with a valve system and two stainless steel valve discs, the piston moves downward and draws air into the cylinder. The largest disc flexes to fold downward, allowing the air to pass. When the piston moves upward, the large disc flexes again to seal against the valve seat.
What advantages does it provide?
✓ Low installation costs
✓ Save energy in no-load conditions and operate efficiently at partial load
✓ Less moving parts when compared to other types of compressors, resulting in lower maintenance requirements
If you're a commercial business looking for a stationary compressor to power high PSI/CFM pneumatic tools, you may opt for an oiled compressor. Or, if you're concerned with noise, air purity, changing filters and maintenance, then an oil-free stationary compressor would be ideal.