Marine butterfly valve packing box packing box is similar to that of a certain cut-off valve. The characteristics of the stuffing box similar to all the stuffing box: a finishing the depth of the hole and is suitable for all kinds of packing structure. But one major difference is that at the bottom of the butterfly valve does not require a packing group. Because the structure of the rotary motion, stem movement water will not change position.

on the other hand, Marine butterfly valve packing will always contact with the valve stem on the same 1 t. Because stem rotation never move the straight position, so there's no need to 'wipe with packing group. All is needed is the interval of additional set of dong, packing, and packing pressure. In the open end of the screw Industrial Valves packing box, do not need the upper guide and bearing and shaft on the end of the valve plate of each has its own guide. Shaft can also be transmitted by actuator of bearing in the guide, and USES the gland flange and gland packing compression.

because it is machined by both ends is very normal, so using a dong a plug or a flange seal openings for the stuffing box. To maintain pressure, need a ring gasket or 0. If you use the pipe plug, it should not be in contact with the shaft, because the shaft rotation about a quarter of the action is likely to make the end pipe rotation, lead to process medium leak into the atmosphere.

stuffing box body side to set up the mounting holes, to install the transmission box. Transmission box including linear motion into rotary motion, which can make the linear motion actuator for a quarter on the rotary valve. Industrial valves installed in transmission box on the shaft end is using spline fit or several plate rolling to prevent leakage of rain. Commonly used rotary actuator structure, system and a handwheel actuator detailed in chapter 5.

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