Fabricante de válvula de esfera DBB, válvula de esfera de bloco duplo e sangramento chinês

Double block and bleed (DBB) ball valves are single valve with two seating surfaces, each of which, in the closed position, provides a seal against pressure from a single source. Double block and bleed ball valve works as an alternative to the in-line installation of two valves, have the result in reducing costs.