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Kelly Valve Kelly Velve also named Kelly cock/Drill pipe Safety Valve allowing free passage of drilling fluid without pressure lose.these valves can be used as a dill pipe safety valve or upper Kelly Valve to control blowout pressures or as a lower Kelly Valve to prevent loss of drilling fluid when the kelly is disconnected. The body of The Kelly Valve is made of a single piece of forged AISI 4145H(40CrMnMo)modified alloy steel￡Dfully heat treated to 285-341 Brinell hardness and 40 ft?ò1b(54J)minimum impact strength The main components and the inside of body are chromeplated. The Kelly Valve seals in both directiors with metal to metal seals￡Davailable in 5,000psi￡y35Mpa)/10.000psil75Mpe)/1 5 000pes (105 Mpa) working pressure. The valve uses a hexagon socket on the opeating stem and has positive stops in the open end closed positions The design of the body limits the plug rotation to 90?ò,between the open and closed position. Specifications

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