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連絡先担当者 Mr. Joshua
Hailang Road 87,Xi an District, Mudanjing, Heilongjiang
The Kelly Valve is a full opening valve that provides positive pressure control of the fluids in the drill string .The valve seals in both directions with metal to metal seals .The kelly valve is full-opening , so it dos not interfere with the running of tools such as core barrels or survey instruments.Available in *0.**0 psi working pressure as standard, *5.**0 psi working pressure is available in certain sizes upon request.
