a. The valve works together with the recirculation bypass valve to maintain the safe operation of the system.

b. The main valve clack moves up and down. When the medium flows back, the channel is closed under the action of medium pressure and spring. At this time, the bypass valve is opened. When the main valve clack is fully opened, the bypass valve is closed.

c. The valve clack seal is made of stainless steel by surfacing welding, with strong wear resistance, abrasion resistance and reliable sealing.

d. The valve shall be installed vertically.