·The valve discs with net structure have good synchronization, and the spring without orientable friction takes even force when stressed.
·Valve discs and springs are made of 3Cr13, 1Cr18Ni9Ti . Surface passivation could reduce opposite force and greatly increase the service life of moving parts. These parts are especially provided in the use of lubricating oil-free compressors.
· Both Valve seat and valve cover made of 45 # and 2Cr13 steel are adopted plasma processing in order to enhance the wear-resisting and corrosion resistance.