Globe Valves Used Aboard Ships - Operation, Design, and Repair (Page 4 of 5) Written by: Chief Engineer Mohit Sanguri • Edited by: Lamar Stonecypher Updated Nov 29, 2010 Assembly of Globe Valve Clean all parts and blow dust with compressed air. Put the valve disc on the stem with the set screw or the arrangement provided. Put grease on the threads and screw in the stem through the yoke nut from down below. Care must be taken to put the gland nut and gland flange in correct order in between. Put back the wheel handle and the wheel nut and tighten it. Now close the valve wheel handle fully, so that the valve stem along with the valve disc extends the maximum down. Now put a correct size new gasket on the space provided on the valve body, stick it with grease or Molyslip in case of high temperature applications. Now place the valve disc on the valve seat and correctly center it. This is very important in certain valves where there is no guide. Now put the nuts and the bolts in place but do not tighten them. There would be some gap between the body and the valve bonnet. From there check again that the valve is properly centered. Now start opening the valve. As you do so, the gap between the bonnet and the body would reduce and they would come together. Now fully open the valve and tighten all the bonnet bolts in the correct sequence. Now put correct size, correctly cut, and well-greased gland packings in the stuffing box place. Care should be taken that the cut parts are together with no gaps and that the packings are staggered. Push down the gland nut and the gland flange and put in the gland bolts. The gland bolts must be slightly tightened and the correct tightening must be done in place of installation. Now close and open the valve several times and check whether it is free in movement. Check from the opening of the flanges, whether it is sitting properly on the valve seat. Paint the valve with the primer and keep it for drying. Showing page 4 of 5« prev1 ... 345next »
