Metal Bellows Mechanical Seals (670)

These Metal Bellows Mechanical Seals (670) is an all Hastelloy C, rotating bellows seal, providing high strength and excellent corrosion resistance, It is extremely durable in applications where temperature and media(fluid) result in an aggressive environment.
The Metal Bellows Mechanical Seals (670) has been tested per API-682 YHB seals for low-temperature refinery services. Other common applications include acids, caustics, amines, and products with H2S, such as sour water and sour hydrocarbons.
The YH670 can be designed as a dual seal using a non-prssurized buffer or pressurized barrier fluid. A pumping ring recirculates barrier fluid, assuring cooler operating temperatures and extended reliable performance.

Material:
1.Bellow: Hastelloy-C
2.Metail parts: Hastelloy-C
3.Mating face: tungsten carbide, carbon, silicon carbide YG6/YG8
4.Packings: Viton, EPR, PTFE, Encapsulated Viton, Buna-N, Kalrez
Specifications:
1.Temperature -75A C~200A C
2.Pressure: vacuum to 2.0Mpa
vacuum to 6.0Mpa (double bellow)
3.Speeda 25MPs