The application of the modified clamp in sealing operation

⒈ leaking location and condition

   ⑴ leaking location: flange DN150mm  at the reserved pump outlet of the boiler feed water

   ⑵ leaking condition：

2  leaking medium parameter

3.  Sealing operation method

⑴ Clamp structure：make annular groove for sealing cavity reinforcement.

⑵ Sealant selection：apply sealant TXY-18#, which  could quickly set up the bearing capability.

⑶ Sealing method

  ① set up the block by injecting in the annular groove;

  ② control the injection time in accordance to sealant curing characteristics.

Sealing operation procedure

4, Sealing operation procedure

  ⑴ connect the adaptor to each injection port, and install the clamp;

  ⑵ drain the medium by the main injection port and inject the sealant at the annular groove；

  ⑶ inject . Compact the sealant in the sealing cavity and also make complementary injection after the sealant getting cured；

  ⑷ block at the end and inject the sealant in the middle sealing cavity.

5. Set up sealing cavity

    Inject from the port which is farthest from the main leaking port. Slight approach to the main leaking point.

   ⑴ Initial injection pressure

   ① Friction resistance of the injection pressure；

   ② Resistance of the leaking medium。

   ⑵ The condition of the area filled

   ① The sealant goes toward two sides from the injection port in the sealing cavity；

   ② The sealant flow toward the cavity interior；

   ③ Form a dense integer with the obstruction force increasing；

   ④ The sealant forms bedding surface at the edge area.

⑶. The change inside sealing cavity

⑷ . Set up the effective sealing stress

① The sealing pressure of the last injection is equal to the system pressure；

② Slowly add pressure, and the elastic energy accumulated with the extrusion pressure transmission. 

    Sealing completed：

③ Control the pressure increasing, and make immediate second round of  injection in case of stress relaxation.