Globe-valve locking apparatus for valve lapping

Abstract

A valve lapping tool for lapping globe type valves comprises a clamp device for clamping the valve disc to the valve stem and includes an annular body member having radially directed clamping members for clamping engagement with the valve stem and axially directed clamping members for clamping engagement with the valve disc for preventing relative rotation of the disc and stem during the lapping operation. The lapping operation is carried out on valves such as globe valves by loosening the valve bonnet to permit rotation of the valve stem without axial movement of the valve disc, the clamping of the disc to the valve stem by means of a clamping device, application of lapping compound to the valve face and seat and positioning of the valve in the valve seat and rotation of the valve stem in alternate directions until the valve is properly seated.

Dependencies are inferred from the claim text.