Our pilot valve has a light bowl type diaphragm, high-quality rubber is authenticated by the multinational centered with the strengthening of coated nylon fabric overall vulcanization molding, makes the pilot valve for pressure sensitive reaction, action fast and impact resistance to high pressure, at the same time, the Japanese SWOSC - V spring to ensure that achieve high accuracy and long-term stability, aluminum bronze shaft lever to completely eliminate the friction between stainless steel and bite, and poses the main induction cavity design, piping and convenient at the same time reduce the use of connection joint, and spring is completely isolated on induction cavity completely blocked spring contact with the media, extend the life of the spring