仪器仪表模板

Installation of Sealing packing (stuffing box packing)

Ⅰ.Choose suitable packing style

    Some factors will affect the choice of packing as follow:

    a.       Style of equipment--------pump, valve, stirrer and so on

    b.      Condition of equipment-------new and old status, the gap between shaft  

           and stuffing, the shaft running true centred or eccentric

    c.       The physical characteristics of medium-------gas medium, liquid medium,

           abrasive medium, sticky medium etc

    d.      The chemical characteristics of medium------acidic medium, caustic

           medium etc

    e.       The temperature of medium------consider the frictional heat between the

           turning shaft and the packing, the factor of heat-transmitting properties etc

    f.    The pressure of medium

Ⅱ.Confirm exact packing cross section

Ⅲ.Calculating the exact length of packing ring

Ⅳ.Cut the packing ring exactly

          Usually  use  45°cut

Ⅴ.Inserting the packing ring into the stuffing box as graph as follows:

Ⅵ. Press the packing ring group out, adjust the leakage capacity up to the

     acceptable level.