... duplex mud pump is used in mineral, water well and engineering drilling for pumping water, mud and cement slurry. They are ... as changing taper valve, spherical valve, board valve for different works .Technical ParameterModelSpecificationYB600/30YB900/25YB1100Stroke(mm)180180240Stroke speed ... (s/m)808070,55Limer dia(mm)90, 110, 130150150, 130Displacement(l/min)340,520,7309001100 ...