Multiturn is normally used for valves with a construction where the closing element does not move 90 degrees, eg. normally for globe or gate valves with threaded stems, requiring several API CAST STEEL VALVESturns to close and open. Multiturn is not a 'normal' for BFL or ball valves. As an example a FORGED STEEL VALVESdouble eccentric ballvalve with a gear requiring several turns to close, but where the Ball Valvesball moves 90 degrees, is not called a multiturn ball valve. Multiturn is often used to Check Valvesdescribe the actuator movement for an actuator if the actuator (or gear) has to be turned several turns to close, even if this is mounted on Finally the 'academic' point: Even if the specialGate Valves Orbit ballvalve has a stem requiring several turns to close or open, and are 'nicknamed' multiturn, I would like to reserve the 'multiturn' designation for actuators and globe and check valves, and in this case use, as the factory does, 'rising stem ball valve'.

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