Valve Packing Material Company

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Jiangsu Gist Technology Co.,ltd
Jiangsu Gist Technology Co.,ltd (formerly Dongtai Weifeng Machinery Factory was born in 2012) The new company was established in April 2020. The company's address is No. 1, Industrial Concentration Zone, Wulie Town, Dongtai City, covering an area of ​​22 mu, the factory building area is more than 11,000 square meters, and the total investment is 100 million yuan. The groundbreaking construction started in early 2021 and completed the construction in early 2022. The company is a manufacturer of complete machine automation equipment that integrates development, design, production, manufacturing, sales and after-sales service. The company has a group of highly technical design teams and high-quality front-line skilled employees. According to customer requirements, various high-precision and intelligent high-quality manufacturing equipment can be carefully customized for customers.

As a professional China valve packing material suppliers and valve packing material company, The high-end intelligent automation equipment produced by our company is used in the fields of core engine components such as locomotives, generator sets, mining machinery, commercial vehicles, ships, etc. It has maintained long-term cooperation with foreign-funded enterprises such as the engine parts manufacturing company, Germany MAHLE, the power management company, the United States EATON, and other foreign-funded enterprises, and has entered their global procurement system. The company has the right to import and export independently, and has exported equipment to more than 20 countries and regions such as Germany, Japan, Türkiye, and Iran in recent years. It has established a close partnership with major domestic engine valve manufacturers: Chongqing Sanai Hailing Industrial Co., Ltd., Jinan Ward Auto Parts Co., Ltd., Dengyun Co., Ltd.-Huaiji Lunar Valve Co., Ltd., etc.

The company has more than 10 invention patents and more than 100 utility models. It was awarded a national high-tech enterprise in 2022 and a specialized and specialized enterprise in 2024.

The company has passed the certification of various systems such as ISO9001:2015 quality management system, ISO14001:2015 environmental management system, ISO45001:2018 occupational health and safety management system, and has implemented various system management requirements, and has continuously innovated and improved to meet the all-round needs of customers. Adhering to the principles of people-oriented, win-win cooperation and customer , we warmly welcome domestic and foreign customers to visit our company for guidance!
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  • Jiangsu Gist Technology Co.,ltd
  • Jiangsu Gist Technology Co.,ltd
  • Jiangsu Gist Technology Co.,ltd
  • Jiangsu Gist Technology Co.,ltd
  • Jiangsu Gist Technology Co.,ltd
  • Jiangsu Gist Technology Co.,ltd
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Packing Material Industry knowledge

Valve packing is a sealing element installed between the valve stem and the stuffing box, preventing media leakage from the valve's moving parts. As a critical sealing component, the packing material's performance directly affects the valve's sealing performance, reliability, and service life.

Key Points for Valve Packing Installation and Maintenance
Installation Specifications
Clean the stuffing box and remove any remaining packing residue
Use staggered cuts (30° to 45° angle) for installation
Tighten layer by layer, maintaining a torque of 5 to 15 N·m
Perform 3 to 5 heat tightening cycles (for high-temperature valves)

Maintenance
Regularly check the gland bolt preload
Observe for leakage (allowable dripping of ≤ 1 drop/minute)
Add lubricant (graphite-based grease)
Replacement interval: Generally 2 to 5 years (depending on operating conditions)

Functions of Valve Packing
1. Sealing
Prevents media leakage: Forms a dynamic sealing barrier between the valve stem and the stuffing box, preventing pipeline media (liquid, gas, or steam) from leaking along the valve stem's axis.

2. Auxiliary functions
(1) Lubrication protection
Self-lubricating materials such as graphite/molybdenum disulfide can reduce the friction coefficient of the valve stem (0.08~0.15)
Reduce valve stem wear and extend service life (increase by 2~3 times)
(2) Adaptability to working conditions
Temperature buffer: Graphite packing can withstand drastic temperature differences from -200℃ to 600℃
Pressure regulation: Metal spiral wound gaskets can withstand 42MPa high pressure impact
Corrosion protection: PTFE packing resists strong acid and alkali corrosion (such as 98% sulfuric acid)
(3) Emergency safety function
Fire-safe packing (such as graphite metal composite) expands at high temperatures to form a secondary seal
Complies with API 607 fire test standards