... api standards application:injection the drilling mud into well. when drill ZJGH-35S drilling mud manifold consists of the Z23Y-35 ... -35/50 mud valve, high pressure spherical union, high pressure core union, tee, high pressure hose, elbow, pressure gauge, and pup ... the manufacture of the union. The fine-polished sphere and core achived sealing. The sealing surfaces of both the gate and ...