FIELD: machine building.
SUBSTANCE: prefabricated head removable under field conditions is intended for application together with internal valves. The prefabricated head comprises a body connected through a split joint with the internal valve, in this case, the body features a groove for placing a valve seal, a shaft with cam mechanism pressing on the internal valve stem during rotation, in this case, the shaft is connected to the body with a possibility of rotation and is arranged, at least, partially inside the passage, and a removable regulator having external access, which helps adjust position of the removable regulator with respect to the second body with the aim of changing force applied by the valve seal to the shaft.
EFFECT: removable regulator can be removed under field conditions for the valve seal replacement or repair, which extends the functional capabilities of the claimed group of inventions significantly.
23 cl, 7 dwg
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