YH680/YH670系列

The Type YH680 is the ideal seal for general-purpose applications. Its AM350 bellows provide corrosion resistance in a broad range of services. Its cost- effective design, combined with a reliable performance history, has made the Type YH680 the standard for many low-temperature applications found in the chemical, water and wastewater, pulp and paper, and utility industries.

The Type YH670 is an all Alloy C-276 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 Type YH670 has been tested per API-682 Type B 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 Type YH670 can be designed as a dual seal using a non-pressurized buffer or pressurized barrier fluid. A pumping ring recirculates barrier fluid, assuring cooler operating temperatures and extended reliable performance.

Performance Capabilities Pressure:  Vacuum to 25 bar / 360 psi Speed:  Up to 25 m/s / 5,000 fpm Temperature:        -75°C to +290°C / -100°F to +550°F Materials of Construction Bellows:  Type 670:    Alloy C-276 (UNS N10276)                    Type 675:   Titanium (UNS R52400) Type 680:    AM350 (UNS S35500)                           End-Fittings:  Type 670:    Alloy C-276                      Type 675:   Titanium (UNS R50400) Type 680:    316L Stainless Steel Faces :: Carbon, Tungsten Carbide, Silicon Carbide Static Seals: Fluorocarbon, EPR, PTFE-Encapsulated Fluorocarbon, Perfluoroelastomer, Nitrile