Large compression load required Graphite rings precompressed to 4000 psi for effectiveness of all rings. Gland torque must be maintained after installation and in service to levels shown in manuals.

• 大压缩负荷需要经过4000 psi压力预压的石墨密封环以加强所有密封环的密封效果。安装使用后,必须保持压盖扭力,使其达到手册要求的水平。