2021 Improved Version, Piston seal adopts v-type sealing ring, Better sealing, More wear-resistant and stable. Piston structure, the flow rate is 30% higher than that of traditional diaphragm type. The valve body structure has overflow port, for fast pressure reduction Air compressor pressure valve switch features high accuracy and quick response Small size, light weight, and easy to install, Weight: 1.2786811196 pounds, Manufacturer: EVTSCAN