with screw-spindle (F16K1/12 - F16K1/28 take precedence; actuating mechanisms with screw-spindles F16K31/50)

Full Title

Lift valves , i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces ( ; diaphragm valves F16K7/00) > with screw-spindle (F16K1/12 - F16K1/28 take precedence; actuating mechanisms with screw-spindles F16K31/50)

Child Classifications

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• F16K 1/04 with a cut-off member rigid with the spindle, e.g. main valves
• F16K 1/06 Special arrangements for improving the flow, e.g. special shape of passages or casings