Full opening check valve are designed, manufactured and tested in accordance with API 6D, ASME B16.34, optional design to soft seated or metal seated,and soft seated type can meet 6FD first edition specification requirements. With full opening design, this series of check valve can be capable for pig ball cleaning service. To prevent potential water hammer damage caused by disc closing, a dashpot device can be assembled to control the disc closing time. The function of a check valve is to prevent reversal of flow automatically and promptly.
