These Control Valve Gland Lubricator are used for pushing the grease into the graphited asbestos gland packing of control valves for steam service. The male threads of the lubricator nipple is screwed to the female threads provided in the bonnet of control valve and thus becomes the permanent part of the control valve. For filling the grease into the lubricator, the shut-off valve is closed by turning the bar handle and the hex. head screw is removed.The screw is restored in its place after filling the grease. For pushing the grease into the gland packing,the shut-off valve is opened and the screw is rotated in clock wise direction which pushes the grease forward. The material of lubricator is zinc plated M.S., other materials can be provided on request.