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TYPE 676
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Catalog excerpts

TYPE 676 - 1

® High-Performance Edge-Welded Metal Bellows Seals Low-Temperature and High-Temperature Series

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TYPE 676 - 2

Metastream High-Performance Bellows Seals Sealol developed the first welded metal bellows seal in 1957 to solve critical and demanding applications for NASA, and extended this technology to the process industry. Over 40 years of reliable performance in a broad range of applications, combined with an annual output of over 200,000 bellows seals, establishes Sealol as the leader in bellows sealing technology. Leader in Bellows Sealing Technology Sealol Low-Temperature and High-Temperature bellows seals assure low emissions and optimized Mean-Time-Between-Planned-Maintenance (MTBPM). • Superior...

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TYPE 676 - 3

High-Temperature Bellows Assemblies Performance Capabilities* Pressure Vacuum to 25 bar / 360 psi Vacuum to 69 bar / 1,000 psi with DOUBLE-PLY bellows (see Basic Pressure Ratings curve on Product Specification sheet) -75°C to +425°C / -100°F to +800°F with Flexible Graphite static packing *For more detailed information, see product specification sheet reference S-604/606/609. Materials of Construction Bellows Shell/Primary Ring Alloy 625 (UNS N06625) with Alloy 718 bellows 347 Stainless Steel (UNS S34700) with AM350 bellows Carbon, Tungsten Carbide, Silicon Carbide Static Seals Flexible...

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TYPE 676 - 4

High-Temperature Series Type 604 The Type 604 is the leading seal of choice for demanding, hightemperature applications. Available in either AM350 or Alloy 718, its high-strength design provides maximum reliability. The stationary bellows design accommodates high shaft-to-seal-chamber misalignment. Unlike rotating seals that must flex on every revolution to accommodate shaft-to-seal-chamber misalignment, the stationary 604 adapts to this condition by flexing only once during installation. This reduces seal movement, resulting in increased seal life. Type 609 The Type 609 incorporates all of...

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TYPE 676 - 5

API-682 Qualified (Type 670, 604 and 609) The Low-Temperature and High-Temperature Series Sealol Bellows Seals are fully qualified and comply with all API-682 technical design requirements. Advanced Research and Development The Sealol bellows incorporate all of the design features resulting from key engineering competencies, such as metallic thin shell methodology, tribology and fluid sealing technology, and thin film/fluid mechanics. Scientists at John Crane conduct in-depth research that points the way to tomorrow’s products. Sealol is a registered trademark of John Crane Inc., ECS is a...

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TYPE 676 - 6

Low-Temperature Series Type 670 The Type 670 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 670 has been tested per API-682 Type B seals for lowtemperature refinery services. Other common applications include acids, caustics, amines, and products with H2S, such as sour water and sour hydrocarbons. The Type 670 can be designed as a dual seal using a non-pressurized buffer or pressurized barrier fluid. A pumping...

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TYPE 676 - 7

Low-Temperature Bellows Assemblies Performance Capabilities* Pressure Vacuum to 25 bar / 360 psi for Types 670,675,676,680 Vacuum to 16 bar /230 psi for Types GL1B (see Basic Pressure Ratings curve on Product Specification sheet) -75°C to +290°C / -100°F to +550°F for Types 670,675,676,680 -40°C to +260°C / -40°F to +500°F for Type GL1B (depending on material being used) *For more detailed information, see product specification sheet reference S-670/676/680, and S-GL1B. Materials of Construction Bellows Type 675: Titanium (UNS R52400) Type 680: Alloy 20 (UNS N08020) Type 670: Alloy C-276...

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TYPE 676 - 8

Latin America São Paulo, Brazil Middle East, Africa, Asia Dubai, United Arab Emirates North America Morton Grove, Illinois USA For your nearest John Crane facility, please contact one of the locations above. If the products featured will be used in a potentially dangerous and/or hazardous process, your John Crane representative should be consulted prior to their selection and use. In the interest of continuous development, John Crane Companies reserve the right to alter designs and specifications without prior notice. It is dangerous to smoke while handling products made from PTFE. Old and...

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