Jining Donghong Machinery Co., Ltd

The secondary seal is a wellhead component that provides a means to isolate and seal a casing string.

Seal Types FS seal，P seal，CMS seal

FS is grease-free seal. No need to inject grease to activate the seal after installation, that is, no maintenance. A FS type sealing ring can handle the working pressure of 21MPa, Two can meet the working pressure of 35MPa

P type seal can meet most application environments. A P type sealing ring can handle the working pressure of 35MPa, Two can meet the working pressure of 105MPa

CMS is metal seal. Used under high corrosion and high pressure working conditions that ordinary elastic sealing materials cannot meet, Working pressure can reach 140MPa.