Chengdu Shilun Seal Co., Ltd is can provide first-class mechanical sealing components, standard or customized, to our customers in various industries.

Shilun is among the pioneers in China that actually manufactures mechanical sealing products that can be used to replace products of international brands.
Our products have been widely used in China markets, among enterprises in industries such as petrochemical, oil refining, and nuclear power, etc.

Our products include various kinds of spring mechanical seals, welded metal bellow seals that can be used in many products such as pumps and reactors, and we also manufacture dry gas seal systems that can be used in pumps, centrifuges, and compressors.

We offer standard and/or customized metal bellows made from materials such as 17-4 pH (replacement for AM350), Inconel 718, HC-276, Ti, Alloy20, etc. The raw materials are from suppliers of aerospace materials. These metal bellows mechanical seals can be used in various systems that require the working environment within the ranges specified below:

A. Temperature: -200ºC ~ 450 ºC
B. Pressure: Vacuum 10-4 Torr ~ 15Mpa
C. Diameter of axle (outer diameter of axle sleeve): φ 13mm ~ φ 270mm (0.5" ~ 10.625")
D. Rotate speed: 1r/min ~ 13500r/min

1. Design of Bellows Mechanical Seals
2. Slid material of bellows is imported from the aerospace suppliers
3. Slid stamping
4. Welding bellows (the digital micro plasma welder is made by Shilun itself)
5. Vacuum heat-treatment
6. Bellows' elastic test and grinding
7. Static pressure test of bellows' components in water
8. Dynamic pressure test of cartridge bellows mechanical seals (450KG ultra-diameter shaft)
9. Laser etching
10. Encapsulating