How To Solve The Problem When The Preload Of The Valve Is Insufficient?

If the pre-tightening force of the valve is insufficient and the sealant cannot seal, the bolts of the pressure packing can be tightened to increase the pre-tightening force for sealing. The roughness value of the valve plug and the valve body sealing surface is small, its geometric accuracy and the taper of the conical valve body can be sealed with a small preload, and the main valve plug can move freely in the valve body. Because the sealing surface does not contact the source medium when it is fully opened, it is easy to damage the sealing surface at different times, so the lubricating plug valve is specially folded on the wear medium.
The valve should not be used for saving, because the sealing agent mainly exposed on the sealing surface during saving, so every time the valve is closed, the valve body seal should stop restoring. This valve is applicable to the main branch pipe of oil field or gas field. Since this pipe does not eliminate turbidity pipe, and the medium in the oil field or gas field contains sand and water, the use of this valve is suitable.
The opening and closing part of the valve is a plug valve disc, the convex surface is flat or conical, and the valve disc moves in a straight line along the fluid. It is only for full opening and full closing, and cannot be adjusted and throttled. It is a forced closed valve, so when the valve is closed, pressure is applied to the valve to prevent leakage of the forced convex face. The valve channel and the main flow channel form a slash, so the damage degree of the flow state is less than that of the conventional, so the pressure loss through the valve body is relatively small. Because the liquid in the valve only needs to change its direction once, the pressure through this valve is reduced to the valve of traditional structure